IRMCS2031

SPI interface connector

IRMCS2031 has one SPI interface connector (J4) on the board. The connector is a 6pin header and its pin

assignement are shown below. The signal level is 3.3V with 5V tolerant input. Maximum transimission speed is

6MHz.

J4

HDR6

1

2

3

4

5

6

MISO

MOSI

SCLK

SYNC

CS

Figure 6 SPI interface connector

SPI Register Access

When configured as an SPI device read only and read/write operations are performed using the following transfer

format:

Command Byte

Data Byte 0

…………….

Data Byte N

Data Transfer Format

Bit Position

7

6

5

4

3

2

1

0

Read

Only

Register Map Starting Address

Command Byte Format

Data transfers begin at the address specified in the command byte and proceed sequentially until the SPI transfer

completes. Note that accesses are read/write unless the “read only” bit is set.

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