HD6413008F RENESAS [Renesas Technology Corp], HD6413008F Datasheet - Page 272

• Manufacturer Part Number: HD6413008F
• Description: Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series
• Manufacturer: RENESAS [Renesas Technology Corp]

8. 16-Bit Timer
Timing of Setting of Overflow Flag (OVF): OVF is set to 1 when 16TCNT overflows from
H'FFFF to H'0000 or underflows from H'0000 to H'FFFF. Figure 8.35 shows the timing.
8.5.2
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 8.36 shows the timing.
Rev.4.00 Aug. 20, 2007 Page 228 of 638
REJ09B0395-0400
φ
Address
IMF, OVF
φ
16TCNT
Overflow
signal
OVF
OVI
Timing of Clearing of Status Flags
Figure 8.36 Timing of Clearing of Status Flags
Figure 8.35 Timing of Setting of OVF
T
1
TISR write cycle
TISR address
T
2
T
3