tmp19a44fda TOSHIBA Semiconductor CORPORATION, tmp19a44fda Datasheet - Page 251

• Manufacturer Part Number: tmp19a44fda
• Description: 32bit Tx System Risc
• Manufacturer: TOSHIBA Semiconductor CORPORATION

External Bus Interface
(5) Chip selector recovery time
If access to external areas occurs consecutively, a dummy cycle can be inserted for recovery time.
The dummy cycle insertion setting can be made in the chip selector and wait controller registers,
BmnCS<BnCSCV>. As for the number of dummy cycles, one system clock (internal) can be specified for
each block. Fig. 8.18 shows the timing of recovery time insertion.
When chip selector recovery is inserted (ALE width:1fsys)
fsys
A[23:16]
AD[15:0]
/RD,/WR
ALE
/CS
Lower-order address
Fig. 8.18 Timing of Recovery Time Insertion
Normal cycle
tsys
Higher-order address
TMP19A44 (rev1.3) 8-23
Data
Lower-order address
Chip selector recovery cycle
Higher-order address
Data
Dummy cycle
TMP19A44
2010-04-01