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Chapter 7
Bus and Memory Control (BCU, MEMC)
Preliminary User’s Manual U17566EE1V2UM00
(2)
Read with address setup wait and idle state insertion
Figure 7-14
Timing: read data with address setup wait and idle state insertion
Register settings:
• BCTm.BTk0 = 0 (connected external device is SRAM or external I/O)
• ASC.ACk[1:0] = 01
B
(one address setup wait state inserted)
• DWCm.DWk[2:0] = 000
B
(no programmable data wait states inserted)
• BCC.BCk[1:0] = 01
B
(one idle state inserted)
Note
1.
The circles indicate the sampling timing.
2.
The broken line indicates the high-impedance state (bus is not driven).
TA
S
W
Addre
ss
D
a
t
a
WAIT (inp
u
t)
D[
3
1:0] (I/O)
WR (o
u
tp
u
t)
RD (o
u
tp
u
t)
C
S
k (o
u
tp
u
t)
A[2
3
:0] (o
u
tp
u
t)
BCLK
TI
T2
T1
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