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IRMCS2033
SPI interface Connector
IRMCS2033 has one SPI interface connector (J4) on the board. The connector is a 6-pin header and its pin
assignments are shown below. The signal level is 3.3V with 5V tolerant input. Maximum transmission speed is 6
MHz.
J4
SPI
Interface
1
2
3
4
5
MISO
SCLK
MOSI
SYNC
CS
6
HDR6
Figure 7. 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
Register Map Starting Address
Only
Command Byte Format
Data transfers begin at the address specified in the command byte and proceed sequentially until the SPI transfer
completes. As in the Host Parallel Access, the internal address register is incremented after each SPI byte is
transferred. Note that accesses are read/write unless the “read only” bit is set.
This document is the property of International Rectifier and may not be copied or distributed without expressed consent.
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