HD643303x Hitachi, HD643303x Datasheet - Page 267

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

8.5.2 Clearing of Status Flags
If the CPU reads a status flag while it is set to 1, then writes 0 in the status flag, the status flag is
cleared. Figure 8-60 shows the timing.
ø
TCNT
Overflow
signal
OVF
OVI
ø
Address
IMF, OVF
H'FFFF
Figure 8-60 Timing of Clearing of Status Flags
Figure 8-59 Timing of Setting of OVF
T
1
252
TSR write cycle
TSR address
T
2
H'0000
T
3