UPD78F9500MA-CAC-A Datasheet, PDF (140/342 Pages) Renesas Technology Corp – 8-Bit Single-Chip Microcontrollers

CHAPTER 7 8-BIT TIMER H1
Figure 7-8. Timing of Interval Timer/Square-Wave Output Operation (1/2)
(a) Basic operation (01H ≤ CMP01 ≤ FEH)
Count clock
Count start
8-bit timer counter H1 ^{00H 01H}
CMP01
N 00H 01H
Clear
N
N
00H 01H 00H
Clear
TMHE1
INTTMH1
TOH1
Interval time
<1>
<2>
<2>
<3>
Level inversion,
Level inversion,
match interrupt occurrence,
match interrupt occurrence,
8-bit timer counter H1 clear
8-bit timer counter H1 clear
<1> The count operation is enabled by setting the TMHE1 bit to 1. The count clock starts counting no more than
1 clock after the operation is enabled.
<2> When the values of 8-bit timer counter H1 and the CMP01 register match, the value of 8-bit timer counter H1
is cleared, the TOH1 output level is inverted, and the INTTMH1 signal is output.
<3> The INTTMH1 signal and TOH1 output become inactive by clearing the TMHE1 bit to 0 during timer H1
operation. If these are inactive from the first, the level is retained.
Remark 01H ≤ N ≤ FEH
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User’s Manual U18172EJ3V0UD