SH7216 Group Accessing MultiMediaCard Using the Renesas
Contents
1. data token MOSI From the SH7216 to the MMC Command Data CRC Data cRc MISO From the MMC Dat Dat to the SH7216 Response econ Busy sass Busy Response Idle H FF Mog Figure 7 Data Write Sequence R01AN0039EJ0100 Rev 1 00 Page 6 of 25 Aug 27 2010 RENESAS SH7216 Group Accessing MultiMediaCard Using the Renesas Serial Peripheral Interface 2 1 6 CRC The MMC detects an error using CRC7 and CRC16 Figure 8 and Figure 9 show CRC7 generator checker and CRC16 generator checker CRC is turned OFF by default in SPI mode however use CMD59 to turn ON or OFF the CRC Even when the CRC is turned OFF transmitting or receiving CRC cannot be omitted data out gt gt rj gt gt gt cuit data in i i gt A Generator polynominal X X 1 Figure 8 CRC7 Generator Checker data out gt FP Pe h gt PP Fe PP Pp gt Pe we m data in i gt Y Generator polynominal X X X 1 Figure 9 CRC16 Generator Checker R01AN0039EJ0100 Rev 1 00 Page 7 of 25 Aug 27 2010 RENESAS SH7216 Group Accessing MultiMediaCard Using the Renesas Serial Peripheral Interface 2 1 7 Initializing the MMC After power up the MMC requires delay cycles as its initialization sequence Then assert the CS2. the number which is included in the command name Set an argument to the command parameter according to the command Set the CRC7 which is computed from 5 bytes including the command code and command parameter Start Host End 0 1 Command Command parameter CRC7 1 code Ne ay A ag z lt y J 1 byte 4 bytes i 1 byte La gt CRC7 target data Figure 1 Command Format Table 1 lists major commands Table 1 Major Commands Name oo Description Name a Description CMDO H 00 Resets the MMC CMD17 H 11 Reads the single block CMD1 H 01 Initializes the MMC CMD18 H 12 Reads the multiple blocks CMD9 H 09 Reads the CSD register CMD24 H 18 Writes a single block CMD10 H 0A Reads the CID register CMD25 H 19 Writes the multiple blocks CMD12 H 0C Stops to read multiple blocks CMD58 H 3A Reads the OCR register CMD13 H OD Reads the Status register CMD59 H 3B Turns the CRC ON or OFF R01AN0039EJ0100 Rev 1 00 Page 3 of 25 Aug 27 2010 RENESAS SH7216 Group Accessing MultiMediaCard Using the Renesas Serial Peripheral Interface 2 1 3 Responses When the MMC receives a command from the SH7216 it returns a response The response format varies depending on the command This section describes R1 response as one of the major responses Figure 2 shows R1 response format bit 7 bit 0 0 In idle state 1 The card is in idle state and running the i
3. General Precautions in the Handling of MPU MCU Products The following usage notes are applicable to all MPU MCU products from Renesas For detailed usage notes on the products covered by this manual refer to the relevant sections of the manual If the descriptions under General Precautions in the Handling of MPU MCU Products and in the body of the manual differ from each other the description in the body of the manual takes precedence 1 Handling of Unused Pins Handle unused pins in accord with the directions given under Handling of Unused Pins in the manual The input pins of CMOS products are generally in the high impedance state In operation with an unused pin in the open circuit state extra electromagnetic noise is induced in the vicinity of LSI an associated shoot through current flows internally and malfunctions occur due to the false recognition of the pin state as an input signal become possible Unused pins should be handled as described under Handling of Unused Pins in the manual 2 Processing at Power on The state of the product is undefined at the moment when power is supplied The states of internal circuits in the LSI are indeterminate and the states of register settings and pins are undefined at the moment when power is supplied In a finished product where the reset signal is applied to the external reset pin the states of pins are not guaranteed from the moment when power is supplied until the reset process is c
4. Jaya Selangor Darul Ehsan Malaysia Tel 60 3 7955 9390 Fax 60 3 7955 9510 Renesas Electronics Korea Co Ltd 11F Samik Lavied or Bldg 720 2 Yeoksam Dong Kangnam Ku Seoul 135 080 Korea Tel 82 2 558 3737 Fax 82 2 558 5141 2010 Renesas Electronics Corporation All rights reserved Colophon 1 0
5. PE10 pin as general purpose I O ports This example controls the output port to generate the chip select signal not using SSL pin function of the RSPI Port E I O register L H 0400 PEIORL RO1ANO0039EJ0100 Rev 1 00 Aug 27 2010 Specify PE10 pin as output Page 11 of 25 ztENESAS SH7216 Group Accessing MultiMediaCard Using the Renesas Serial Peripheral Interface 2 2 3 RSPI Configuration Procedure Figure 13 and Figure 14 show flow charts for configuring the RSPI in the sample program This setting enables the RSPI to operate in master mode C RSPI configuration _ Set Standby control register 5 STBCR5 e Set the SPCR SPCR H 00 Set the RSPI control register SPCR Sen Sek the RSPI e Enable supplying the clock for the RSPI e Set the SPPCR SPPCR H 30 Set the RSPI pin control register SPPCR Functions 1 Set the MOSI idle value to 1 2 Set the output pin to CMOS output Not open drain 3 Disable the loopback e Set the SPBR SPBR H 07 Function Set the bit rate to 391 kbps When P clock is 50 MHz BRDV bit is 3 Set the RSPI bit rate register SPBR Set the SPDCR SPDCR H 00 Set the RSPI data control register SPDCR Functions l 1 Access the SPDR register in words 2 The SPDR reads the receive buffer 3 Transmit receive one frame by a transmission reception Set the SPCKD SPCKD H 00 Function Set the dela
6. The state of CD pin of the connector varies depending on insertion or removal of the MMC The SH7216 detects the MMC insertion using this signal however note that the example shown in Figure 12 does not support hot insertion and removal Set the SH7216 pins according to the Pin Function Controller PFC Settings listed in Table 4 SH7216 3VCC 3VCC 3VCC 3VCC 3VCC oe Connector MMC PE10 SSL3 CS CS DAT3 PA4 MOSI DI e DI CMD VSS VSS VDD VDD PA5 RSPCK CLK gt SCLK CLK VSS VSS PA3 MISO DO DO DATO supe NC 8 Dipati a NC D2 DAT2 PA19 IRQ7 CD a D4 DAT4 4 WP pa D5 DAT5 COM 2 D6 DAT6 GND D7 DAT7 GND Note This example does not support hot insertion and removal Figure 12 MMC Connection in SPI Mode Table 4 Pin Function Controller PFC Settings Register Name Setting Port A control register H1 H 0000 PACRH1 Description Specify PA19 pin as general purpose I O ports MMC insertion can also be detected using IRQ7 however this example uses the input port to detect the insertion Port A I O register H H 0000 PAIORH Specify PA19 pin as input Port A control register L2 H 0055 PACRL2 Specify PA5 pin as RSPCK I O RSPI Specify PA4 pin as MOSI I O RSPI Port A control register L1 H 5000 PACRL1 Specify PAS pin as MISO I O RSPI Port E control register L3 H 0000 PECRL3 Specify
7. Write the transmit data in e Write the transmit data in the RSPI data register SPDR When the transmit the RSPI data register data is not specified write the dummy data Clear the transmit buffer empty flag Reception completed or overflow e Wait until the RSPI receive buffer full flag SPRF in the RSPI status register SPSR or overrun error flag OVRF is 1 Yes Yi Overflow No Read the receive data from the RSPI data register y y Clear the receive buffer full flag Clear the overflow flag y C Error e Set the SPE bit in the SPCR register to 0 to disable the RSPI No Transferred the specified number of bytes of data Yes Negate SSL3 signal e Control SSL3 signal by port to negate Disable the SPI transfer C r2 gt Figure 15 Flow Chart for Transferring Data in the Sample Program R01AN0039EJ0100 Rev 1 00 Page 14 of 25 Aug 27 2010 RENESAS SH7216 Group Accessing MultiMediaCard Using the Renesas Serial Peripheral Interface 3 Sample Program This section describes an overview of the sample program and MMC manipulation function API 3 1 Overview The sample program accesses the MMC in SPI mode It reads the Master boot record MBR and the first partition assuming that it is used in the file system Use the SH7216 Renesas Serial Peripheral Interface for the SPI transfer The specifications of data transfer
8. in bytes Functions mmc_data_read and mmc_data_write use this variable to calculate the address from the block number CSD_INFO gMmc_CsdlInfo MMC_SLOT_NUM Reads the CSD register information when the card is inserted and stores the information in the CSD_INFO structure unsigned char gMmc_CsdBuf MMC_SLOT_NUM MMC_CSD_ SIZE This is the buffer to read the CSD register which is read when the card is inserted unsigned char gMmc_CidBuf MMC_SLOT_NUM MMC_CID_ SIZE This is the buffer to read the CID register which is read when the card is inserted unsigned char gMmc_OcrBuf MMC_SLOT_NUM MMC_OCR_SIZE RO1ANO0039EJ0100 Rev 1 00 Aug 27 2010 This is the buffer to read the OCR register which is read when the card is inserted Page 18 of 25 7tENESAS SH7216 Group Accessing MultiMediaCard Using the Renesas Serial Peripheral Interface 3 6 Functions This section describes the main function and MMC manipulation functions API User function Main function Format void main void Return value None Description Initializes the hardware and driver variables Wait until the MMC is inserted and initialize the MMC After initialization it reads the Master boot record MBR and the starting sector of the first partition MMC manipulation function API mmc_init_driver Initializes the MMC driver Format void mmc_init_driver void Return value None Description Initializes the MMC d
9. in the design of your equipment Renesas Electronics assumes no responsibility for any losses incurred by you or third parties arising from the use of these circuits software or information 5 When exporting the products or technology described in this document you should comply with the applicable export control laws and regulations and follow the procedures required by such laws and regulations You should not use Renesas Electronics products or the technology described in this document for any purpose relating to military applications or use by the military including but not limited to the development of weapons of mass destruction Renesas Electronics products and technology may not be used for or incorporated into any products or systems whose manufacture use or sale is prohibited under any applicable domestic or foreign laws or regulations 6 Renesas Electronics has used reasonable care in preparing the information included in this document but Renesas Electronics does not warrant that such information is error free Renesas Electronics assumes no liability whatsoever for any damages incurred by you resulting from errors in or omissions from the information included herein 7 Renesas Electronics products are classified according to the following three quality grades Standard High Quality and Specific The recommended applications for each Renesas Electronics product depends on the product s quality grade as indicated below You must chec
10. int slot_no MMC_INFO info int slot_no l Slot number MMC_INFO info O Buffer to store the card information Return value MMC_OK Successful MMC_ERR_PARAM Parameter error Description Returns the card information card type write protection status capacity and the number of blocks R01AN0039EJ0100 Rev 1 00 Page 23 of 25 Aug 27 2010 RENESAS SH7216 Group Accessing MultiMediaCard Using the Renesas Serial Peripheral Interface 4 References e Software Manual SH 2A SH2A FPU Software Manual Rev 3 00 The latest version of the software manual can be downloaded from the Renesas Electronics website e Hardware Manual SH7214 Group SH7216 Group Hardware User s Manual Rev 2 00 The latest version of the hardware user s manual can be downloaded from the Renesas Electronics website e MMC specifications MultiMediaCard MMC Electrical Standard High Capacity Ver 4 2 URL http www jedec org RO1AN0039EJ0100 Rev 1 00 Page 24 of 25 Aug 27 2010 RENESAS SH7216 Group Website and Support Renesas Electronics Website http www renesas com Inquiries http www renesas com inquiry Accessing MultiMediaCard Using the Renesas Serial Peripheral Interface All trademarks and registered trademarks are the property of their respective owners RO1AN0039EJ0100 Rev 1 00 Aug 27 2010 7tENESAS Page 25 of 25 Revision Record Description Rev Date Page Summary 1 00 Aug 27 10 First edition issued A 1
11. mode are as follows e Operating mode Mode 3 Clock while the RSPI is in idle state is H and the RSPI latches the data on even edge e Transfer speed 391 kHz when the MMC is detected 8 33 MHz When the MMC is transferring data e Buffer transfer Access in 8 bit wide by the CPU transfer e Interrupt Used Processing required for controlling the MMC are described as MMC manipulation functions API in the following section 3 2 MMC Manipulation Functions API Table 5 lists the MMC manipulation functions API Table 5 MMC Manipulation Functions API Function Name Description mmc_init_driver Initializes the MMC driver mmc_attach Initializes the media when the MMC is inserted mmc_detach Terminates the media when the MMC is removed mmc_read_data Reads the data from the MMC mmc_write_data Writes the data to the MMC mmc_check_card Detects the insertion of the MMC mmc_get_info Retrieves the card information RO1ANO039EJ0100 Rev 1 00 Page 15 of 25 Aug 27 2010 RENESAS SH7216 Group 3 3 Macro Definitions Constants Accessing MultiMediaCard Using the Renesas Serial Peripheral Interface Table 6 lists the macro definitions used in the MMC manipulation functions API Table 6 Macro Definitions Category Macro Name Value Description Slot Management MMC_SLOT_NUM 1 Number of slots for the MMC MMC_SLOTO 0 Slot number 0 MM
12. signal issue CMDO to transition to SPI mode Initialize the MMC by CMD1 and data transfer is enabled after the initialization sequence is completed Figure 10 shows the initialization steps when using the MMC in SPI mode A Start Insert delay cycles to satisfy all the conditions y Use the RSPI to transmit the H FF data for the number of bytes 3 Transmit H FF data required 5 1 ms min 74 clock cycles min 2 e The supply ramp up time min y y Reset the MMC card 4 Issues CMD0 Assert the chip select signal CS issue CMDO to transition to SPI mode Succeeding commands assert CS signal gt Initializes Te MNC card Issuing CMD1 for the first time starts initialization and check the succeeding responses to make sure that the initialization is Issues CMD1 3 completed O E 5 After the initialization is completed any commands other than CMD1 can be issued Y Figure 10 Initializing the MMC in SPI Mode R01AN0039EJ0100 Rev 1 00 Page 8 of 25 Aug 27 2010 RENESAS SH7216 Group 2 2 Accessing MultiMediaCard Using the Renesas Serial Peripheral Interface Renesas Serial Peripheral Interface RSPI This section describes how to use the SH7216 Renesas Serial Peripheral Interface RSPI 2 2 1 RSPI Operation The SH7216 includes one channel of the Renesas Serial Peripheral Interface RSPI It allows the serial communication with peripheral devices in 4
13. BRENESAS OO __apuicationnore SH7216 Group R01AN0039EJ0100 Rev 1 00 Accessing MultiMediaCard Aug 27 2010 Using the Renesas Serial Peripheral Interface Introduction This application note describes an example to access the MultiMediaCard MMC using the Renesas Serial Peripheral Interface Target Device SH7216 Contents 1 010 0 0110 9 tunun nnan unnn Annn an AAEE EE EEEE AA EA EEEE EERE AR EEEE EERE R EENAA EEEE nnna Enana nnne 2 Ze APplicatloNS issia niniaren ienien aaa na Aaea oa cated chi ba EEN AEEA Eaa AEE ALANA 3 3 Sample Program ievsiccsetedessnceceiactecuebeiuts Godacdecvud dey aia ycbetecqusdd denbleedecadacl ceeuhibesaceebleasadedsedeecdbideeens 15 Ae REISS COS ieee et eect e Cece AA T E EE E E 24 RO1ANO039EJ0100 Rev 1 00 Page 1 of 25 Aug 27 2010 RENESAS SH7216 Group Accessing MultiMediaCard Using the Renesas Serial Peripheral Interface 1 Introduction 1 1 Specifications This application accesses the MMC using the Renesas Serial Peripheral Interface 1 2 Modules Used e Renesas Serial Peripheral Interface e Pin Function Controller 1 3 Applicable Conditions MCU SH7216 Operating Frequency Internal clock 200 MHz Bus clock 50 MHz Peripheral clock 50 MHz AD clock 50 MHz Integrated Development Renesas Electronics Environment High performance Embedded Workshop Ver 4 07 00 C Compiler Renesas Electronics SuperH RISC engine Family C C compiler package Ver 9 03 Release 00 Compiler Options
14. C_SLOT1 1 Slot number 1 Error Code MMC_OK 0 Successful MMC_ERR_PARAM 1 Parameter error MMC_ERR_HARD 2 Hardware error MMC_ERR_CRC 3 CRC error MMC_ERR_WP 4 Write protect error MMC_ERR_MBLKCMD 5 Multiple block command error MMC_ERR_IDLE 6 Idle state error MMC_ERR_OTHER 7 Other error Flag Management MMC_TRUE 0x01 Flag is ON MMC_FALSE 0x00 Flag is OFF Card Type MMC_CARD_UNDETECT 0x00 The card is not detected MMC_CARD_MMC 0x01 The MMC is detected MMC_CARD_OTHER OxFF The other type of card is detected Write protection MMC_NO_PROTECT 0x00 Not write protected MMC_W_PROTECT_HARD 0x01 Write protected by hardware MMC_W_PROTECT_SOFT 0x02 Write protected by software Data Transfer MMC_MODE_NORMAL 0x00 Normal transfer mode Mode MMC_MODE_DIRECT 0x01 Direct transfer mode Not used MMC_MODE_FORCED_W 0x02 Force writing mode Write protection is invalid Card Information MMC_BLK_SIZE 512 Block size MMC_CRC_SIZE 2 CRC size MMC_CSD_ SIZE 16 CSD register size MMC_CID_ SIZE 16 CID register size MMC_OCR_SIZE 4 OCR register size RO1ANO0039EJ0100 Rev 1 00 Aug 27 2010 RENESAS Page 16 of 25 SH7216 Group Accessing MultiMediaCard Using the Renesas Serial Peripheral Interface 3 4 Structures Figure 16 shows the structures used in the MMC manipulation functions API e Structures to define the MMC information typedef struct unsigned char Card Card type unsigned char WProtect Write protection status unsigned long
15. Default setting in the High performance Embedded Workshop cpu sh2afpu fpu single debug gbr auto global_volatile 0 opt_range all infinite_loop 0 del_vacant_loop 0 struct_alloc 1 MMC Compliant with version 4 2 Note MMC with version 4 3 or later does not support SPI mode 1 4 Related Application Note For more information refer to the following application note e SH7216 Group Example of Initialization 1 5 About Active low Pins Signals The symbol suffixed to the pin or signal names indicates that the pins or signals are active low RO1AN0039EJ0100 Rev 1 00 Page 2 of 25 Aug 27 2010 RENESAS SH7216 Group Accessing MultiMediaCard Using the Renesas Serial Peripheral Interface 2 Applications This application accesses the MMC using the Renesas Serial Peripheral Interface RSPI This section describes an overview of the MMC protocols and the RSPI For more information about the MMC protocols refer to the MMC specifications 2 1 MMC Protocols Overview 2 1 1 SPI Mode The MMC has two modes MultiMediaCard mode MMC mode which is defined as its default operating mode and SPI mode which is based on the SPI standard This application uses SPI mode As this application note assumes that the MMC is used in SPI mode MMC mode is not described here 2 1 2 Commands Use the commands to access the MMC Figure 1 shows the command format Fix bits start host and end to 0 1 and 1 respectively Set the command code as
16. HARD MMC_ERR_WP MMC_ERR_OTHER int mode Slot number Block number to start writing the data Number of blocks to write Buffer to store the write data Data transfer mode Successful Parameter error Hardware error Write protect error Other error Card is not detected Description Writes the data to the card in blocks 512 bytes Writes the specified number of blocks from the specified block number Specify the data transfer mode by the following mode MMC_MODE_NORMAL Write data uses the buffer area specified by an argument MMC_MODE_FORCED_W Force to write data even when the card is write protected RO1ANO0039EJ0100 Rev 1 00 Aug 27 2010 Page 22 of 25 7tENESAS SH7216 Group Accessing MultiMediaCard Using the Renesas Serial Peripheral Interface MMC manipulation function API mmc_check_card Detects an insertion of a card Format int mmc_check_card int slot_no unsigned char sts int slot_no Slot number unsigned char sts Buffer to store the card insertion state Return value MMC _OK Successful MMC_ERR_PARAM Parameter error Description Detects the insertion of the card and stores the port status in the argument sts MMC_TRUE Card is detected MMC_FALSE Card is not detected Note As the chattering on pins is not removed remove any chattering on caller as appropriate MMC manipulation function API mmc_get_info Retrieves the card information Format int mmc_get_info
17. MemSize Card capacity unsigned longMaxBlkNum The number of the max blocks MMC_INFO total 10byte Ay e Structures to define the CSD information typedef struct unsigned short Taac Asynchronous data access time unsigned short Nsac Synchronization data access time int Nac Data access time unsigned long MemSize Card capacity unsigned longMaxBlkNum The number of the max blocks ky unsigned char WP Write protection information unsigned char Reserve 3 CSD_INFO total 20byte af Figure 16 Structures Used in the MMC Manipulation Functions API RO1ANO039EJ0100 Rev 1 00 Page 17 of 25 Aug 27 2010 RENESAS SH7216 Group Accessing MultiMediaCard Using the Renesas Serial Peripheral Interface 3 5 Variables Table 7 lists the variables used in the MMC manipulation functions API Use these constants to make sure the status of the MMC inserted The MMC manipulation functions store the variable value Table 7 Variables Used in the MMC Manipulation Functions API Declaration unsigned char gMmc_Media MMC_SLOT_NUM Description Stores the type of the card detected For the macro definition used refer to Card Type in Table 6 unsigned char gMmc_WP MMC_SLOT_NUM Stores the status of the write protection For the macro definition used refer to Write protection in Table 6 unsigned short g4mc_AddrRev MMC_SLOT_NUM Stores the block size
18. SPI transmit interrupt SPRI RSPI receive interrupt SPEI RSPI error interrupt SPDR RSPI data register R01AN0039EJ0100 Rev 1 00 Aug 27 2010 Figure 11 RSPI Block Diagram 7tENESAS Page 9 of 25 SH7216 Group Accessing MultiMediaCard Using the Renesas Serial Peripheral Interface 2 2 2 MMC Card Connections to the SH7216 Table 3 lists the MMC pins Pin configurations for MMC mode and SPI mode are different and the MMC is in MMC Mode when it is powered on As the MMC uses only common pins with SPI and MMC modes before transition to SPI mode the MMC is allowed to communicate with pin connections in SPI mode Table 3 MMC Pins Pin SPI Mode MMC Mode No Name Description Name Description 1 CS Chip select DAT3 Data 2 DI Data IN CMD Command response 3 VSS1 Ground VSS1 Ground 4 VDD Power supply VDD Power supply 5 SCLK Clock CLK Clock 6 VSS2 Ground VSS2 Ground 7 DO Data OUT DATO Data 8 Not used DAT1 Data 9 Not used DAT2 Data 10 Not used DAT4 Data 11 Not used DAT5 Data 12 Not used DAT6 Data 13 Not used DAT7 Data R01AN0039EJ0100 Rev 1 00 Page 10 of 25 Aug 27 2010 RENESAS SH7216 Group Accessing MultiMediaCard Using the Renesas Serial Peripheral Interface Figure 12 shows the MMC connection in SPI mode External pull up resistors are installed on pins SSL3 MOSI and MISO to avoid MMC malfunction when the MCU pins are high impedance
19. apacity and layout pattern When changing to products of different type numbers implement a system evaluation test for each of the products Notice 1 All information included in this document is current as of the date this document is issued Such information however is subject to change without any prior notice Before purchasing or using any Renesas Electronics products listed herein please confirm the latest product information with a Renesas Electronics sales office Also please pay regular and careful attention to additional and different information to be disclosed by Renesas Electronics such as that disclosed through our website 2 Renesas Electronics does not assume any liability for infringement of patents copyrights or other intellectual property rights of third parties by or arising from the use of Renesas Electronics products or technical information described in this document No license express implied or otherwise is granted hereby under any patents copyrights or other intellectual property rights of Renesas Electronics or others You should not alter modify copy or otherwise misappropriate any Renesas Electronics product whether in whole or in part Descriptions of circuits software and other related information in this document are provided only to illustrate the operation of semiconductor products and application examples You are fully responsible for the incorporation of these circuits software and information
20. ftware alone is very difficult please evaluate the safety of the final products or system manufactured by you 10 Please contact a Renesas Electronics sales office for details as to environmental matters such as the environmental compatibility of each Renesas Electronics product Please use Renesas Electronics products in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances including without limitation the EU RoHS Directive Renesas Electronics assumes no liability for damages or losses occurring as a result of your noncompliance with applicable laws and regulations 11 This document may not be reproduced or duplicated in any form in whole or in part without prior written consent of Renesas Electronics 12 Please contact a Renesas Electronics sales office if you have any questions regarding the information contained in this document or Renesas Electronics products or if you have any other inquiries Note 1 Renesas Electronics as used in this document means Renesas Electronics Corporation and also includes its majority owned subsidiaries Note 2 Renesas Electronics product s means any product developed or manufactured by or for Renesas Electronics 7rCENESAS SALES OFFICES Renesas Electronics Corporation http www renesas com Refer to http Avww renesas com for the latest and detailed information Renesas Electronics America Inc 2880 Scott Boulevard San
21. is in idle state the SH7216 receives H FF data Discard the received H FF data When the MMC is busy H 00 wait until it receives H FF data the MMC is in idle state MOSI From the SH7216 to the MMC Command Command MISO From the MMC to the SH7216 Response Response 7 Idle H FF Busy H 00 Figure 5 Access Sequence with No Data Figure 6 shows the data read sequence when reading multiple blocks The SH7216 issues the Multiple Block Read command receives a response and then a data token The SH7216 issues the Stop command to stop the communication Multiple Block Read command Stop command MOSI From the SH7216 to the MMC command Commana MISO From the Response Data CRC Data CRC Response MMC to the SH7216 Idle H FF 1 block 512 bytes Start data block token Figure 6 Data Read Sequence Figure 7 shows the data write sequence when writing multiple blocks The SH7216 issues the Multiple Block Write command receives a response and then transmits a data token After transmitting a data token the SH7216 receives a data response The SH7216 issues the Multiple Block Write Stop data token to stop the communication Start data block token Multiple Block Write command 1 block 512 bytes Multiple Block Write Stop
22. k the quality grade of each Renesas Electronics product before using it in a particular application You may not use any Renesas Electronics product for any application categorized as Specific without the prior written consent of Renesas Electronics Further you may not use any Renesas Electronics product for any application for which it is not intended without the prior written consent of Renesas Electronics Renesas Electronics shall not be in any way liable for any damages or losses incurred by you or third parties arising from the use of any Renesas Electronics product for an application categorized as Specific or for which the product is not intended where you have failed to obtain the prior written consent of Renesas Electronics The quality grade of each Renesas Electronics product is Standard unless otherwise expressly specified in a Renesas Electronics data sheets or data books etc Standard Computers office equipment communications equipment test and measurement equipment audio and visual equipment home electronic appliances machine tools personal electronic equipment and industrial robots High Quality Transportation equipment automobiles trains ships etc traffic control systems anti disaster systems anti crime systems safety equipment and medical equipment not specifically designed for life support Specific Aircraft aerospace equipment submersible repeaters nuclear reactor control systems medical equipment or sy
23. l to 0 active As the sample program controls the SSL signal by port the SSLP register setting is invalid Set the SSLP SSLP H 00 y Set the SPSCR SPSCR H 00 Set the RSPI sequence control register SPSCR Function Specify the sequence length to 1 Only SPCMD register 0 is used e Select the multiplexed pins Set the port PORT Function Pins MISO MOSI and RSPCK y Set the RSPI control register SPCR Functions 1 Disable the RSPI 2 Disable the transmision reception error interrupt 3 Set the RSPI in master mode y 4 Disable to detect the mode fault error End 5 Set the RSPI in SPI mode Set the SPCR SPCR H 08 Figure 14 Flow Chart for Configuring the RSPI in the Sample Program 2 2 RO1AN0039EJ0100 Rev 1 00 Page 13 of 25 Aug 27 2010 RENESAS SH7216 Group Accessing MultiMediaCard Using the Renesas Serial Peripheral Interface 2 2 4 RSPI Data Transfer Procedure Figure 15 shows the flow chart for transferring data in the sample program This setting allows the RSPI for full duplex communication C Data transfer y Enable the SPI transfer e Set the SPE bit in the SPCR register to 1 to enable the RSPI Assert SSL3 signal e Control SSL3 signal by port to assert gt gt e Wait until the RSPI transmit buffer empty flag SPTEF in the RSPI status Transmit buffer register SPSR is 1 is empty Yes
24. nitializing process Erase Reset 1 An erase sequence was cleared before executing because non erase command was received Illegal Command Switch Error 1 An illegal command code was detected Communication CRC Error 1 The CRC check of the last command failed Erase Sequence Error 1 An error occurred in the sequence of erase commands Address Misaligned 1 A misaligned block is detected during data transfer Address Out Of Range Block Length Error 1 The command s argument was out of the allowed rage for this card Figure 2 R1 Response RO1AN0039EJ0100 Rev 1 00 Page 4 of 25 Aug 27 2010 RENESAS SH7216 Group Accessing MultiMediaCard Using the Renesas Serial Peripheral Interface 2 1 4 Data Token When the MMC receives a command to read or write the data the MMC read command or the SH7216 write command transfers the data using the data token after receiving the response Figure 3 shows the data token format The MMC inserts the start data block token at the beginning of the data to distinguish an invalid value in idle state H FF from the valid data H FF The MMC adds CRC16 at the end of the data however the start data block token is not included in the CRC calculation Table 2 lists the start data block tokens ha gt CRC16 target data H Start data block token Data CRC16 Seals 1 byte 1 block 512 bytes 2 bytes Figure 3 Data Token Forma
25. ompleted In a similar way the states of pins in a product that is reset by an on chip power on reset function are not guaranteed from the moment when power is supplied until the power reaches the level at which resetting has been specified 3 Prohibition of Access to Reserved Addresses Access to reserved addresses is prohibited The reserved addresses are provided for the possible future expansion of functions Do not access these addresses the correct operation of LSI is not guaranteed if they are accessed 4 Clock Signals After applying a reset only release the reset line after the operating clock signal has become stable When switching the clock signal during program execution wait until the target clock signal has stabilized When the clock signal is generated with an external resonator or from an external oscillator during a reset ensure that the reset line is only released after full stabilization of the clock signal Moreover when switching to a clock signal produced with an external resonator or by an external oscillator while program execution is in progress wait until the target clock signal is stable 5 Differences between Products Before changing from one product to another i e to one with a different type number confirm that the change will not lead to problems The characteristics of MPU MCU in the same group but having different tyoe numbers may differ because of the differences in internal memory c
26. read_ data Reads the data from the card Accessing MultiMediaCard Using the Renesas Serial Peripheral Interface MMC manipulation function API Format int mmc_read_data int slot_no unsigned long blkno unsigned long bikent unsigned char buff int slot_no unsigned unsigned long blkno long blkcnt unsigned char buff int mode Return value MMC_OK MMC_ERR_PARAM MMC_ERR_HARD MMC_ERR_CRC MMC_ERR_OTHER int mode Slot number Block number to start reading the data Number of blocks to read O Buffer to store the read data Data transfer mode Successful Parameter error Hardware error CRC error Other error Card is not detected Description Reads the data from the card in blocks 512 bytes Reads the specified number of blocks from the specified block number Specify the data transfer mode by the following mode MMC_MODE_NORMAL Store the read data in the buffer area specified by an argument RO1ANO0039EJ0100 Rev 1 00 Aug 27 2010 Page 21 of 25 7tENESAS SH7216 Group mmc_write data Writes the data to the card Accessing MultiMediaCard Using the Renesas Serial Peripheral Interface MMC manipulation function API Format int mmc_write_data int slot_no unsigned long blkno unsigned long blkent unsigned char buff int slot_no unsigned long blkno unsigned long blkcnt unsigned char buff int mode Return value MMC OK MMC_ERR_PARAM MMC_ERR_
27. river Initializes the control module Renesas Serial Peripheral Interface Starts up all slots 1 Sets the pins to control the card 2 Initializes the driver variable area Execute this function once after the system is powered on RO1AN0039EJ0100 Rev 1 00 Page 19 of 25 Aug 27 2010 RENESAS SH7216 Group Accessing MultiMediaCard Using the Renesas Serial Peripheral Interface MMC manipulation function API mmc_attach Initializes the MMC slot attach process Format int mmc_attach int slot_no int slot_no Slot number Return value MMC OK Successful MMC_ERR_PARAM Parameter error MMC_ERR_HARD Hardware error MMC_ERR_CRC CRC error MMC_ERR_IDLE Idle state error MMC_ERR_OTHER Other error Card is not detected Description Initialize the MMC card slot Initializes the card control variables Initializes the card Execute this function when an insertion of the card is detected MMC manipulation function API mmc_detach Detaches the MMC slot Format int mmc_detach int slot_no int slot_no Slot number Return value MMC OK Successful MMC_ERR_PARAM Parameter error Description Executes the detach process to the specified slot Initializes the control module Renesas Serial Peripheral Interface Sets the pins to control the card Initializes the card control variables Execute this function when the card is removed RO1AN0039EJ0100 Rev 1 00 Page 20 of 25 Aug 27 2010 RENESAS SH7216 Group mmc_
28. stems for life support e g artificial life support devices or systems surgical implantations or healthcare intervention e g excision etc and any other applications or purposes that pose a direct threat to human life 8 You should use the Renesas Electronics products described in this document within the range specified by Renesas Electronics especially with respect to the maximum rating operating supply voltage range movement power voltage range heat radiation characteristics installation and other product characteristics Renesas Electronics shall have no liability for malfunctions or damages arising out of the use of Renesas Electronics products beyond such specified ranges 9 Although Renesas Electronics endeavors to improve the quality and reliability of its products semiconductor products have specific characteristics such as the occurrence of failure at a certain rate and malfunctions under certain use conditions Further Renesas Electronics products are not subject to radiation resistance design Please be sure to implement safety measures to guard them against the possibility of physical injury and injury or damage caused by fire in the event of the failure of a Renesas Electronics product such as safety design for hardware and software including but not limited to redundancy fire control and malfunction prevention appropriate treatment for aging degradation or any other appropriate measures Because the evaluation of microcomputer so
29. t Table 2 Start Data Block Tokens Data Token Type Value Single Multiple Block Read H FE B 1111 1110 Single Block Write H FE B 1111 1110 Multiple Block Write Start H FC B 1111 1100 Multiple Block Write Stop H FD B 1111 1101 Figure 4 shows the data error token format If the MMC cannot transfer the data when the SH7216 reads the data the MMC returns the data error token to the SH7216 instead of the data token When the SH7216 writes data in the MMC the MMC returns the data response to the SH7216 to indicate whether the MMC writes the data successfully bit 7 bit 0 Execution Error 1 Generic internal card error occurred 0 0 0 Card Error 1 Generic internal card error Card ECC Failed 1 Card internal ECC was applied but failed to correct the data Address Out Of Range 1 The command parameters was out of the allowed range for this card Address Misalign 1 A misaligned block is detected during data transfer Figure 4 Data Error Token Format RO1AN0039EJ0100 Rev 1 00 Page 5 of 25 Aug 27 2010 RENESAS SH7216 Group Accessing MultiMediaCard Using the Renesas Serial Peripheral Interface 2 1 5 MMC Access Sequence This section describes the MMC access sequence Figure 5 shows the MMC access sequence when there is no data The SH7216 issues the command and then receives the response If the SH7216 tries to receive data when the MMC
30. ta Clara CA 95050 2554 U S A Tel 1 408 588 6000 Fax 1 408 588 6130 Renesas Electronics Canada Limited 1101 Nicholson Road Newmarket Ontario L3Y 9C3 Canada Tel 1 905 898 5441 Fax 1 905 898 3220 Renesas Electronics Europe Limited Dukes Meadow Millboard Road Bourne End Buckinghamshire SL8 5FH U K Tel 44 1628 585 100 Fax 44 1628 585 900 Renesas Electronics Europe GmbH Arcadiastrasse 10 40472 Dusseldorf Germany Tel 49 211 6503 0 Fax 49 211 6503 1327 Renesas Electronics China Co Ltd 7th Floor Quantum Plaza No 27 ZhiChunLu Haidian District Beijing 100083 P R China Tel 86 10 8235 1155 Fax 86 10 8235 7679 Renesas Electronics Shanghai Co Ltd Unit 204 205 AZIA Center No 1233 Lujiazui Ring Rd Pudong District Shanghai 200120 China Tel 86 21 5877 1818 Fax 86 21 6887 7858 7898 Renesas Electronics Hong Kong Limited Unit 1601 1613 16 F Tower 2 Grand Century Place 193 Prince Edward Road West Mongkok Kowloon Hong Kong Tel 852 2886 9318 Fax 852 2886 9022 9044 Renesas Electronics Taiwan Co Ltd 7F No 363 Fu Shing North Road Taipei Taiwan R O C Tel 886 2 8175 9600 Fax 886 2 8175 9670 Renesas Electronics Singapore Pte Ltd 1 harbourFront Avenue 06 10 keppel Bay Tower Singapore 098632 Tel 65 6213 0200 Fax 65 6278 8001 Renesas Electronics Malaysia Sdn Bhd Unit 906 Block B Menara Amcorp Amcorp Trade Centre No 18 Jin Persiaran Barat 46050 Petaling
31. wire SPI operation and 3 wire clock synchronous operation using pins MOSI Master Out Slave In MISO Master In Slave Out SSL Slave Select and RSPCK SPI Clock As the RSPI has the following features it supports various SPI compliant devices e Master slave modes e Serial transfer clock with programmable polarity and phase change SPI mode e Transfer bit length selectable from 8 9 10 11 12 13 14 15 16 20 24 and 32 Figure 11 shows the RSPI block diagram Internal data bus Bus interface 1 i 1 i Baud rate Po 1 generator 1 i i i 1 i Shift register i i i 1 1 7 i 1 i Normal Master i 1 MOSI rT i Transmission 1 reception 1 1 9 2 controller i Loopback Slave 1 Normal Master MISO lt gt O O i Loopback j i i 1 Loo os Slave i gt SPTI i gt SPRI 1 SSLO lt be SPEI H SSL1 to SSL3 i 1 RSPCK H i 1 Legend SPCR RSPI control register SSLP RSPI slave select polarity register SPPCR RSPI pin control register SPSR RSPI status register SPSCR RSPI sequence control register SPSSR RSPI sequence status register SPDCR RSPI data control register SPCKD RSPI clock delay register SSLND RSPI slave select negate delay register SPND RSPI next access delay register SPCMD RSPI command registers 0 to 3 SPBR RSPI bit rate register SPTX RSPI transmit buffer SPRX RSPI receive buffer SPTI R
32. y from SSL signal assertion to RSPCK operation to 1 RSPCK When the SCKDEN bit is 1 Set the RSPI clock delay register SPCKD e Set the SSLND SSLND H 00 Function Set the delay from the RSPCK oscillation stop to SSL signal negation to 1 RSPCK When the SLNDEN bit is 1 Set the RSPI next access delay register SPND Set the SPND SPND H 00 Function Specify the SSL signal negation period after the transfer is completed to 1 RSPCK When the SPNDEN bit is 1 Set the SPCMDO SPCMDO H 07BF Set the RSPI command register 0 SPCMDO ae 1 Specify the RSPCK delay to 1 RSPCK Set the RSPI slave select negate delay register SSLND 2 3 Specify the next access delay to 1 RSPCK 4 Specify the data format to MSB first 5 Specify the transfer data length to 8 bits 6 Keep the SSL signal level from the end of the transfer until the beginning of the next access Specify the SSL signal to assert SSL3 Specify the SPBR divided by 8 as the bit rate Specify the RSPCK when idling to 1 0 Specify the RSPCK to output data on odd edge and latch data on even edge Figure 13 Flow Chart for Configuring the RSPI in the Sample Program 1 2 RO1AN0039EJ0100 Rev 1 00 Page 12 of 25 Aug 27 2010 RENESAS SH7216 Group Accessing MultiMediaCard Using the Renesas Serial Peripheral Interface y Set the RSPI slave select polarity register SSLP Function Specify the SSL signa
Download Pdf Manuals
Related Search