Datasheet

Table Of Contents
Section 11 8-Bit Timers (TMR)
Page 364 of 846 REJ09B0140-0900 Rev. 9.00
Sep 16, 2010
H8S/2215 Group
11.8.2 Contention between TCNT Write and Increment
If a timer counter clock pulse is generated during the T
2
state of a TCNT write cycle, the write
takes priority and the counter is not incremented. Figure 11.11 shows this operation.
φ
Address
TCNT address
Internal write signal
TCNT input clock
TCNT
NM
T
1
T
2
TCNT write cycle by CPU
Counter write data
Figure 11.11 Contention between TCNT Write and Increment