HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 402

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 9 16-Bit Timer Pulse Unit (TPU)
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 9.52 shows the operation timing when a TGR compare match is specified as the clearing
source, and H'FFFF is set in TGR.
Rev.3.00 Mar. 26, 2007 Page 360 of 772
REJ09B0355-0300
Figure 9.52 Contention between Overflow and Counter Clearing
TCNT input
clock
TCNT
Counter
clear signal
TGF flag
TCFV flag
Prohibited
H'FFFF
H'0000