3 read -> write operation, 4 write -> write operation – FUJITSU MB91460 SERIES FR60 User Manual
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Chapter 31 External Bus
5.Operation of the Ordinary bus interface
5.3 Read -> Write Operation
This section shows the operating timing for read -> write.
■
Operation Timing of Read -> Write
"Timing Chart for Read -> Write" shows the operation timing for (TYP3-0=0000
B
, AWR=0048
H
).
Figure 5-3 Timing Chart for Read -> Write
•
Setting of the W07/W06 bits of the AWR register enables 0-3 idle cycles to be inserted.
•
Settings in the CS area on the read side are enabled.
•
This idle cycle is inserted if the next access after a read access is write access or access to another area.
5.4 Write -> Write Operation
This section shows the operation timing for write -> write.
■
Write -> Write Operation
"Timing Chart for the Write -> Write Operation" shows the operation timing for (TYP3-0=0000
B
,
WR=0018
H
).
MCLK
AS
CSn
RD
WRn
D[31:0]
A[31:0]
Read
Write
Idle *