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Chapter 8
8-bit Timer
8.2.2
Programmable Timer Registers
The programmable timer register consists of timer n compare register (TMnOC) and timer n binary counter
(TMnBC).
Timer n Compare Register
(TM0OC: 0x03F72, TM1OC: 0x03F73, TM2OC: 0x03F82, TM3OC: 0x03F83, TM4OC: 0x03F92,
TM5OC: 0x03F93)
Timer n compare register is an 8-bit register which stores a value compared with timer n binary counter.
bp
Bit name
At reset
Access
When setting the compare register in cascade connection, pair of registers (TM1OC and
TM0OC, TM3OC and TM2OC, TM5OC and TM4OC) must be accessed simultaneously with
16-bit access instruction, MOVW.
..
..
Timer n Binary Counter
(TM0BC: 0x03F70, TM1BC: 0x03F71, TM2BC: 0x03F80, TM3BC: 0x03F81, TM4BC: 0x03F90,
TM5BC: 0x03F91)
Timer n binary counter is an 8-bit up counter. If any data are written to the timer n compare register while the
counter is stopped, the timer n binary counter is cleared to 0x00.
bp
Bit name
At reset
Access
When reading the value of TMnBC register in cascade connection, pair of registers (TM1BC
and TM0BC, TM3BC and TM2BC, TM5BC and TM4BC) must be accessed simultaneously
with 16-bit access instruction, MOVW.
..
..
When reading the value of TMnBC register while operating, indeterminate data while count-
ing up may be read. Alternatively, the register must be read multiple times, and those data
confirmed to be the same.
..
..
VIII - 8
8-bit Timer Control Registers
7
6
X
X
R/W
R/W
7
6
0
0
R
R
5
4
TMnOC7-0
X
X
R/W
R/W
R/W
5
4
TMnBC7-0
0
0
R
R
3
2
X
X
R/W
R/W
3
2
0
0
R
R
1
0
X
X
R/W
1
0
0
0
R
R
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