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Document No. 002-14949 Rev. *E
Page 45 of 113
PRELIMINARY
CYW43353
9.2.1.5. Status
The gSPI interface supports status notification to the host after a read/write transaction. This status notification provides information
about any packet errors, protocol errors, information about available packet in the RX queue, etc. The status information helps in
reducing the number of interrupts to the host. The status-reporting feature can be switched off using a register bit, without any timing
overhead. The gSPI bus timing for read/write transactions with and without status notification are as shown in
and
for information on status field details.
Figure 23. gSPI Signal Timing Without Status (32-bit Big Endian)
C31
C30
C1
C0
D31
D30
D1
D0
Command
32
bits
Write
Data
16*n
bits
cs
sclk
mosi
C31
C30
C0
D31
D30
D0
Command
32
bits
Read
Data
16*n
bits
miso
cs
sclk
mosi
Response
Delay
C31
C30
C0
D31
D30
D0
Command
32
bits
Read
Data
16*n
bits
miso
cs
sclk
mosi
Response
Delay
D1
C31
C30
C1
C0
D31
D30
D1
D0
Command
32
bits
Write
Data
16*n
bits
cs
sclk
mosi
C31
C30
C1
C0
D31
D30
D1
D0
C31
C30
C1
C0
D31
D30
D1
D0
Command
32
bits
Write
Data
16*n
bits
cs
sclk
mosi
C31
C30
C0
D31
D30
D0
Command
32
bits
Read
Data
16*n
bits
miso
cs
sclk
mosi
Response
Delay
C31
C30
C0
D31
D30
D0
Command
32
bits
Read
Data
16*n
bits
miso
cs
sclk
mosi
Response
Delay
C31
C30
C0
D31
D30
D0
Command
32
bits
Read
Data
16*n
bits
miso
cs
sclk
mosi
Response
Delay
D1
C31
C30
C0
D31
D30
D0
Command
32
bits
Read
Data
16*n
bits
miso
cs
sclk
mosi
Response
Delay
D1
Write
Write
‐
Read
Read