Document Number: 002-14826 Rev. *G
Page 57 of 65
PRELIMINARY
CYW43903
17.1.3 Memory Fast-Read Timing
shows the SPI flash extended and quad memory fast-read timing.
Note:
Regarding
:
1. 24-bit addressing is used, so A[MAX] = A[23] and A[MIN] = A[0].
2. For an extended SPI protocol, C
x
= 7 + (A[MAX] + 1).
3. For a quad SPI protocol, C
x
= 1 + (A[MAX] + 1)/4.
Figure 15. Memory Fast-Read Timing
0
7
8
C
x
MSB
Command
LSB
C
Extended
DQ0
DQ1
High-Z
D
OUT
D
OUT
D
OUT
D
OUT
D
OUT
D
OUT
D
OUT
D
OUT
D
OUT
0
1
2
C
x
C
Quad
DQ[3:0]
MSB
Don’t care
A[MAX]
A[MIN]
LSB
Dummy Cycles
MSB
Command
LSB
A[MAX]
A[MIN]
Dummy Cycles
D
OUT
D
OUT
D
OUT
MSB
LSB