MMC/SD Board User Manual
Contents
1. MMC SD Manual All Mikroelektronika s development systems feature a large number of peripheral modules expanding microcontroller s range of application and making the process of program testing easier In addition to these modules it is also possible to use numerous additional modules linked to the development system through the I O port connectors Some of these additional modules can operate as stand alone devices without being connected to the microcontroller SJ MikroElektronika SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD waking ib siw ple MMC SD MMC SD Additional Board A MultiMedia Card MMC is a memory card manufactured in Flash technology The standard size of these cards is 24x32x1 4 mm MMC cards have been superseded by Secure Digital Cards SD cards lately but they are still very popular and widely used because they can be utilized with most devices that support SD cards Both types of cards are used as memory data storage in portable devices such as cameras digital audio players cellular phones etc Most modern computers are supplied with an MMC SD slot that can read both MMC and SD cards The MMC SD additional board enables data read write between a microcontroller and MMC SD cards Data transfer is performed via a standard Serial Peripheral Interface SPI Due to built in voltage level converters such as 74LVCC3245 these cards may be used both with 3 3V and 5V microcontrollers The positi2. on of jumper J1 depends on the power supply voltage level The MMC SD additional board is connected to Mikroelektronika s development systems via a standard IDC10 connector Figure 1 MMC SD additional board Figure 2 MMC SD additional board connected to a development system VCC MMC CN2 9 MMC CARD VCC MMC VCC 3 3 VOUT VCC BRD 3 3V Dev Board ZAC a s arene c2 1 c1 Ge 5V Dev Board OVCC REG 700nF MC33269DT 3 3 100nF 34 10uF 330uF Figure 3 MMC SD additional board connection schematic FERRITE MikroElektronika MMC SD DIP switch SW1 is used to select microcontroller pins to be used for SPI communication When the MMC SD additional board is conected to EasyPIC LV18F EasyLV 18F and BigPIC development systems the following switches on the DIP switch SW1 should be set to the ON position P4 gt MISO P5 gt MOSI P3 gt SCK For EasyAVR and Easy8051 development systems the following switches on the DIP switch SW1 should be set to the ON position P6 gt MISO P5 gt MOSI P7 gt SCk For the EASYdsPIC development system the following switches on the DIP switch SW1 should be set to the ON position P2 gt MISO P3 gt MOSI P6 gt SCK For the Easy24 33 development system the following switches on the DIP switch SW1 should be set to the ON position P2 gt MISO P5 gt MOSI P3 gt SCK MikroElektr
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