Datasheet

Section 14 Timer Z
Rev. 3.00 Mar. 15, 2006 Page 280 of 526
REJ09B0060-0300
3. Overflow Flag (OVF) Set Timing: The overflow flag is set to 1 when the TCNT overflows.
Figure 14.50 shows the timing.
OVF
TCNT
Overflow signal
H'0000H'FFFF
ITMZ
φ
Figure 14.50 OVF Flag Set Timing
14.5.2 Status Flag Clearing Timing
The status flag can be cleared by writing 0 after reading 1 from the CPU. Figure 14.51 shows the
timing in this case.
Address
TSR address
φ
WTSR
(internal write signal)
IMF, OVF
ITMZ
Figure 14.51 Status Flag Clearing Timing