Accessory Port (mCard) Interfaces on Conduit

The accessory card interface to the Conduit base board has the following interface options:

Interface Description
I2C Used by all accessory cards. I2C is required for Electronic identification (EID) support on the accessory card but can be used for other I2C devices. It should support standard (100 kHz) and/or fast (400 kHz) clock speeds.
The I2C interface reserves the full block of EEPROM address space for Electronic ID support, so we recommend that you not attach any other EEPROM devices to the interface. We recommend that you use a 24C04 part, because both address bits of the 24C04 are connected to the AP interface allowing you to identify four separate accessory port (AP) cards in a system.
Serial UART Serial UART with HW flow control used by Serial inteface based Accessory Cards
SDIO interface and/or SPI Interface AP1 has option for SDIO or SPI interface, based on what Accessory Card is installed. AP2 supports only SPI based Accessory Cards.
GPIO Additional control pins for certain Accessory Cards.
Interrupts Software defined interrupts. Can also be used as additional control pins.
PPS GPS generated Pulse-Per-Second signal used for software timing. Default is 1 pulse/sec.
USB 2.0 A standard USB 2.0 High Speed interface for USB based Accessory Cards.
5 VDC 1 Amp supply Used by all accessory cards.
3.3 VDC 1 Amp supply Used by all accessory cards.

For accessory card specifications, regulatory content, and installation information, go to Accessory Cards.