Figure 10-59 Timing of Setting of OVF
10.5.2 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 10-60 shows the timing.
Figure 10-60 Timing of Clearing of Status Flags
Overflow
signal
H'FFFF
H'0000
ø
TCNT
OVF
OVI
ø
Address
IMF, OVF
TSR write cycle
TSR address
T
1
T
2
T
3
378
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