Microcontrollers ApNote AP1639
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1. mode CHM after programming All verify attempts will fail as long as the CPU is not in normal mode regardless of the content of the OTP memory For entering normal mode it is necessary first to disconnect the pull down resistor at port pin POL 2 and then to reset the controller pin POL 4 has to remain unchanged low for bootstrap loader mode In module vefy which performs a comparison of the content of the OTP memory and the source data bits ROMEN and ROMS of register SYSCON will be set to 1 in order to enable internal OTP memory and to map the lower 32k OTP memory to segment 1 see user s manual Memory Organization Semiconductor Group 9 of 10 AP1639 03 98 SIEMENS C164 OTP Memory Programming 7 ROM UP The on chip OTP Flash ROM Memory Upload Tool Attached you find the Windows based utility ROM UP20 which allows you to upload the content of OTP and Flash memory blocks of 32k 256k are currently supported by using the bootstrap loader The uploaded data can then be stored into a file helpful and necessary for a file compare Following a short description of ROMUPV2 EXE Self extracting utility program to upload contents of internal Flash ROM memory via bootstrap loader In combination with a bootstrap loader which is executed from the internal flash this program allows to upload the content of internal Flash OTP ROM memory via the serial port and optionally to write the uploaded data into a f2. 0 0 AP1633 COCOON uu ut 4U00000 SIEMENS Microcontrollers ApNote AP1639 Additional file AP163901 EXE available In System Programming of C164 OTP Devices Siemens C164CI 16 bit microcontrollers provide 64 KByte OTP memory on chip This application note gives hints and examples for in system programming of C164Cl OTP devices Memory programming and memory uploading is supported by the Windows based memory tools Memtool and ROM UP Author Peter Kliegelh fer HL DC AT Microcontroller Application Support We A GpPDF Id sentigonductor Group 03 98 Rel 01 SIEMENS C164 OTP Memory Programming Contents Page 1 OTP Memory OverviewW 22 2000 e eee enhn 3 2 OTP Memory Configuration 00 cece eee 5 3 CPU Host Mode CHM Selection 0 cee eee 6 4 Memtool The on chip OTP Flash Memory Programming Tool 6 4 1 Special Memtool Options 000 E EEEE tees 7 5 Pits Traps and MINGS irsi iiser nr ns cece eee ee eens 7 6 OTP Programming Drivers Overview 000 e eee eee eee eee eee 8 6 1 Programm Verlly ssi aana pa EET E Ed bddedddddduduiu wit 9 7 ROM UP The on chip OTP Flash ROM Memory Upload Tool 10 AP1639 ApNote Revision History Actual Revision 03 98 Previous Revision none original version Page of Page of actual Rev prev Rel Semiconductor Group 2 of 10 AP1639 03 98 SIEMENS C1
3. 64 OTP Memory Programming 1 OTP Memory Overview The C164Cl devices provide 64 KBytes of one time programmable OTP memory on chip for both instruction code and constant data The C164Cl OTP module is a 512 KBit memory organized as 16K double words of 32 bit each On its CPU interface it presents a fast read access 60ns fopy 25 MHz of 32 bit in one machine cycle Read accesses of code and data are possible in any addressing mode thus realizing the highest CPU performance with fetch and execution of double word instructions in a single instruction cycle For programming and testing purposes a special interface is realised which directly connects the OTP module to an external or internal CPU host Programming is performed in steps of 16 bit words needing typically 100 us per word Special algorithms for over under programming with verify operations are not necessary The programming voltage is supplied on the EA VPP pin Unprogrammed OTP memory cells contain all 1 s The OTP memory can be programmed both in an appropiate programming board supplier Ertec SMS Data I O or in the target system which provides a lot of flexibility The lower 32 KBytes of the on chip OTP memory of the C164Cl can be mapped to either segment O 00 0000 to 00 7FFF or segment 1 01 0000 to 01 7FFF during the initialization phase to allow external memory to be used for additional system flexibility The upper 32 KBytes of the on chip OT
4. All C164 OTP drivers are properly tested with 9600 Baud transmission rate You may also try the higher baudrate 19200 Bd for faster data transmission The readme txt files in the sub directories memtool siemdrv C16x contain important informations about each driver C164CI Standard RS232 external bus disabled BUSCONO 0000h no EINIT system clock output not enabled no Vpp switching control via port pin C164CI cv A customized version A RS232 external bus disabled BUSCONO 0000h no EINIT system clock output enabled no Vpp switching control via port pin C164CI Phytec Starterkit RS232 external bus disabled BUSCONO 0000h EINIT instruction in modules progp and vefy system clock output not enabled Vpp switching control via port pin P8 3 Semiconductor Group 8 of 10 AP1639 03 98 SIEMENS C164 OTP Memory Programming C164CI KL cv B customized version B K Line external bus disabled BUSCONO 0000h EINIT instruction in modules progp and vefy system clock output not enabled Vpp switching control via port pin P1L 0 C164CI cv C customized version C RS232 external bus disabled BUSCONO 0000h no EINIT system clock output enabled no Vpp switching control via port pin 6 1 Program Verify As already mentioned a verification of OTP programming can only be done when the CPU is in normal mode Be aware that the CPU is still in CPU host
5. P memory are assigned to locations 01 8000 to 02 0000 figure 1 Semiconductor Group 3 of 10 AP1639 03 98 SIEMENS C164 OTP Memory Programming ed 00 FFFF H 01 C000 Page 6 018000 008000 Page 5 Segment 1 014000 Page 4 a 010000 1 00 0000 Page 3 poo 4 00 0000 Mapping t Page2 00 8000 Page 1 A 00 4000 0 32K Page 0 N 000000 00 0000 Segment 0 Physical C16x Memory Configuration 64 KByte OTP Memory OTP Address Figure 1 C164Cl OTP Memory Overview Semiconductor Group 4 of 10 AP1639 03 98 SIEMENS C164 OTP Memory Programming 2 OTP Memory Configuration Upon reset the default memory configuration of the C164Cl is determined by the state of its EA pin When EA is low the internal OTP memory is disabled and the startup code is fetched from external memory In order to access the on chip OTP memory after booting from external memory the internal OTP memory must be enabled via software by setting bit ROMEN in register SYSCON The lower 32 KBytes of the OTP memory can be mapped to segment 0 or segment 1 controlled by bit ROMS1 in register SYSCON Mapping to segment 1 preserves the external memory containing the startup code while mapping to segment 0 replaces the lower 32 KBytes of the external memory with on chip OTP memory In this case a valid vector table must be provided As the on chip OTP memory covers more than segment 0 segmentation shou
6. bled In single chip applications this might could lead to problems with external peripherals because accesses to the OTP programming interface respectively to the registers OPAD OPDAT OPCTRL can be seen externally In this case it is necessary to reset bit BUSACTO before performing the first OTP programming interface access The default setting of BUSACTO in CHM is independent of SYSCON settings All C164 OTP drivers set BUSCONO and therefore BUSACTO to zero in module load 2 The lower baudrate 9600 Bd is recommended for single wire data transmission K Line Semiconductor Group 7 of 10 AP1639 03 98 SIEMENS C164 OTP Memory Programming 6 OTP Programming Drivers Overview Several OTP programming drivers are available This is founded on different demands of different applications The following overview is just a snapshot of the status quo In the future new versions will be available which will partly replace the current ones Please pay attention to the readme txt files which come along with the drivers Due to the fact that it is currently actual design step BC not possible to perform OTP read accesses in CPU host mode CHM the success of an OTP programming operation can only be verified in normal mode by reading the OTP content via ROMbus see chapter 6 1 This is just a workaround In the future C164 OTP devices will be available which allow OTP read access in CHM and therefore program verification during programming
7. ile When ROM Upload V2 0 is invoked click on box in the second line on the left side near loader program click on field load select file loader hex since the example bootstrap loader only accepts 32 bytes like the integrated bootstrap loader a second loader loader hex must be used to load larger programs click on field load on the right side of third line select desired upload program according to desired maximum memory size of your controller 64kb h67 will read entire memory of C164CI 8E 32kb h67 will read first 32 Kbyte of memory Note first 32Kbyte 0000h 7FFFh of memory is always mapped to segment 1 1 0000h 1 7FFFh by file loader hex in order to have linear addresses Semiconductor Group 10 of 10 AP1639 03 98
8. ld be enabled by clearing bit SGTDIS in register SYSCON in order to map the whole internal OTP into the address space Whenever the internal memory configuration of the C164Cl is changed mapping enabling disabling the following procedure must be used to ensure correct operation Configure the internal OTP memory as required Execute an inter segment branch JMPS CALLS RETS Reload all four DPP registers Note Register SYSCON can only be modified before the execution of the EINIT instruction Note For detailed informations concerning the handling of internal non volatile memory please refer to the users manual chapter System Programming Handling the Internal ROM Pits Traps and Mines Semiconductor Group 5 of 10 AP1639 03 98 SIEMENS C164 OTP Memory Programming 3 CPU Host Mode CHM Selection For in system programming it is necessary to activate the programming interface which is realized as an XBUS peripheral The C164Cl enters CHM with port pin POL 2 low during reset It is useful to combine this mode with the bootstrap loader mode see next chapter 4 Memtool The OTP Flash Memory Programming Tool In system programming of on chip OTP and Flash memory is supported by the Windows based programming tool Memtool which is freely available Siemens provides driver updates on the Internet please ask for the current status Memtool is an application example as well as a programming tool for on chip OTP a
9. nd Flash memory supporting C161Cl 32F C167CR 16F C167CS 32F and C163 16F Flash devices and C164CI 8E OTP devices Thanks to the modular structure Memtool is easily expandable for future C16x devices For an interested user all driver sources are also available figure 2 Along with the drivers come readme txt files which contain informations about the hardware requirements and latest informations about Memtool and each driver Memtool C163 Flash C167 Flash C164 OTP Driver Driver Driver Driver Driver Driver Sources Sources Sources Figure 2 Semiconductor Group 6 of 10 AP1639 03 98 SIEMENS C164 OTP Memory Programming All software including the programming data is downloaded from a host PC into the internal RAM of the microcontroller The application expects only internal RAM external RAM is not required For OTP programming an additional programming voltage e g 11 5 V has to be applied to pin EA Vpp Please check for the right Vpp value in the status sheet In order to download the application from a PC a serial link has to be established The C164CI already provides an asynchronous serial interface that only has to be connected to COM1 or COM2 of your PC Supposing you are using a Phytec C164CI starter kit you can directly connect its serial connector with the COM1 COM2 interface of your PC Note Fo
10. r getting started two steps are needed 1 Activate bootstrap loader mode and enter CPU host mode these modes are activated with port pins POL 2 and POL 4 LOW during reset simple 8 2k pull down resistors are applicable 2 Connect the target with the C164Cl device to a host PC with a serial cable 4 1 Special Memtool Options For default Memtool expects serial communication via RS232 Some drivers also support single wire transmission K Line All drivers which support K Line protocol are marked with KL see box Target Change Select Controller Type Choose the desired mode RS232 or K Line in box Interface Setup Interface In some cases it is also useful to get a LOG file of the transmitted data For LOG file generation switch DIAGLOG in the Memtool configuration file memtool ini siemtool ini has to be set to 1 The LOG file will be closed by leaving Memtool A set box for the LOG switch is currently not implemented 5 Pits Traps and Mines To prevent the controller from beeing damaged main power should always be connected before and disconnected after Vpp The C164CI enters bootstrap mode if pin POL 4 is sampled low at the end of a hardware reset In this case the BSL is activated independent of the selected bus mode no evaluation of pin EA external access in bootstrap loader mode In CPU host mode CHM the default setting of bit BUSACTO in register BUSCONO is 1 which means external bus ena
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