HD643303x Hitachi, HD643303x Datasheet - Page 133

• Manufacturer Part Number: HD643303x
• Description: Hitachi Microcomputer
• Manufacturer: Hitachi

6.4 Usage Notes
6.4.1 Register Write Timing
ASTCR and WCER Write Timing: Data written to ASTCR or WCER takes effect starting from
the next bus cycle. Figure 6-11 shows the timing when an instruction fetched from area 0 changes
area 0 from three-state access to two-state access.
ø
Address
3-state access to area 0
T
1
T
2
Figure 6-11 ASTCR Write Timing
T
3
T
1
118
ASTCR address
T
2
T
3
2-state access
to area 0
T
1
T
2