Hitachi H8/3664 Hardware Manual page 196

Table of Contents

Overflow flag Set Timing: The overflow flag (OVF) is set to 1 when TCNTV overflows from

H'FF to H'00. Figure 11.4 shows the timing.

Overflow signal

Compare Match Flag set Timing: Compare match flag A or B (CMFA or CMFB) is set to 1

when TCNTV matches TCORA or TCORB. The internal compare-match signal is generated in the

last state in which the values match (when TCNTV changes from the matching value to a new

value). Accordingly, when TCNTV matches TCORA or TCORB, the compare match signal is not

generated until the next clock input to TCNTV. Figure 11.5 shows the timing.

Compare match

Figure 11.4 OVF Set Timing

Figure 11.5 CMFA and CMFB Set Timing