Read Data in
IRQ Status Register
Dummy Read
Write Address
Byte (0x6C)
No Data Transitions
(All High/Low)
Don't Care
Ignore
0
1
1
0
1
1
0
0
B7 B6 B5 B4 B3 B2 B1 B0
SLAVE
SELECT
MISO
MOSI
DATA_CLK
No Data Transitions
(All High/Low)
31
SLOS757G – DECEMBER 2011 – REVISED MARCH 2020
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Detailed Description
Copyright © 2011–2020, Texas Instruments Incorporated
A procedure for a dummy read is as follows:
1. Starting the dummy read
1. When using slave select (SS): set SS bit low
2. When not using SS: start condition is when SCLK is high
2. Send address word to IRQ Status register (0x0C) with read and continuous address mode bits set to 1
3. Read 1 byte (8 bits) from IRQ Status register (0x0C)
4. Dummy read 1 byte from register 0Dh (collision position and interrupt mask)
5. Stopping the dummy read
1. When using slave select (SS): set SS bit high
2. When not using SS: stop condition when SCLK is high
Figure 6-14. Procedure for Dummy Read
Figure 6-15. Dummy Read Using SPI With SS
6.12.6.1 Serial Interface Mode Without Slave Select (SS)
The serial interface without the slave select pin must use delimiters for the start and stop conditions.
Between these delimiters, the address, data, and command words can be transferred. All words must be 8
bits long with MSB transmitted first (see