KAmodMMC
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Contents
Description
KAmodMMC Module allows easy and safety connection to any MMC and SD memory card digital system. It provides both compatible connector and bi-directional logic voltage conversion 3.3 V <- > 5 V.
Basic Features
- all-purpose interface for SD and MMC cards
- supply voltage: 5 V
- on-board 3.3 V voltage regulator for SD /MMC cards supply
- on-board logic voltage converter
- maximal card clocking frequency: 13 MHz
- supply voltage indicating LED
- card insertion indicating LED
- jumper for module – system terminals disconnection
Standard Equipment
| Code | Description |
|---|---|
| KAmodMMC |
|
Schematic
Board Layout
Module Connection
CON1 connector description (according to 5V TTL and 3.3V TTL voltage levels)
| Contact No. | Contacts assignment | Description (SD) | Description (MMC) | Connecting designation |
|---|---|---|---|---|
| 1 | +5 V | (+) of supply voltage (5V recommended) | (+) of supply voltage (5V recommended) | Supply |
| 2 | DAT3 (CD/DAT3)/(DT3) | D3 data line | ChipSelect (0 active) | Input /output |
| 3 | DAT2/(DT2) | D2 data line | - | Input /output |
| 4 | CMD | Command input line | MOSI | Input /output |
| 5 | DAT1/(DT1) | D1 data line | IRQ (option) | Input /output |
| 6 | CLK | Card clock signal input | SCK | Input |
| 7 | CDET | Card in slot insertion signal output (0 active) | Card in slot insertion signal output (0 active) | Output |
| 8 | DAT0/(DT0) | D0 data line | MISO | Input /output |
| 9 | WP | Write protection signal output (0 active) | Write protection signal output (0 active) | Output |
| 10 | GND | Supply ground | Supply ground | Supply |
Indicating LEDs
Two indicating LEDs in this module are designed to signalize:
- connected supply – PWR designated LED
- SD or MMC card insertion into Con2 slot-connector – CD designated LED
Module Control
JP1 jumper in this module, allows to connect (On – position) or disconnect (Off – position) SD /MMC card to /from mating system.
