User guide

Redpine Signals, Inc. Proprietary and Confidential. Page 108
R
R
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Figure 23: Frame Read using SPI Commands
The following is the procedure to be followed by the Host to do a memory read.
1. Prepare and send the commands C1, C2 as described for Slave Read.
2. Read the response from the SPI slave (RS9110-N-11-2X module).
3. Status 0x58 indicates that the slave is ready. Host should send the commands
C3, C4 which indicate the length of the data to be read.
Host
Module
Wait period
Start Token (0x55 or
0x0000_0055 depending on 8-bit
or 32-bit mode)
Dummy (0x00)
Dummy (0x00)
D0(0x00)
D1 (0x00)
D(N-1)
(0x00)
……
….
W0
W1
W(N-1)
(0x00)
……
….
C1
C2
C3
C4
R
R
Response
Dummy response
Dummy response
Dummy (0x00)
…………….
Dummy data
Data read
Dummy
R (0x58)
Response