HD6432646 Hitachi, HD6432646 Datasheet - Page 418

• Manufacturer Part Number: HD6432646
• Description: (HD64F264x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

Contention between Overflow/Underflow and Counter Clearing: If overflow/underflow and
counter clearing occur simultaneously, the TCFV/TCFU flag in TSR is not set and TCNT clearing
takes precedence.
Figure 10-56 shows the operation timing when a TGR compare match is specified as the clearing
source, and H'FFFF is set in TGR.
384
Figure 10-56 Contention between Overflow and Counter Clearing
TCNT input
clock
TCNT
Counter
clear signal
TGF
TCFV
ø
H'FFFF
Disabled
H'0000