Appendix B Internal I/O Registers
Rev. 6.00 Aug 04, 2006 page 591 of 680
REJ09B0145-0600
TCW—Timer Counter W
H'B3
Watchdog timer
Bit
Initial value
Read/Write
7
TCW7
0
R/W
6
TCW6
0
R/W
5
TCW5
0
R/W
4
TCW4
0
R/W
3
TCW3
0
R/W
0
TCW0
0
R/W
2
TCW2
0
R/W
1
TCW1
0
R/W
Count value
TMC—Timer Mode Register C
H'B4
Timer C
Bit
Initial value
Read/Write
7
TMC7
0
R/W
6
TMC6
0
R/W
5
TMC5
0
R/W
3
1
0
TMC0
0
R/W
2
TMC2
0
R/W
1
TMC1
0
R/W
4
1
Auto-reload function select
Clock select
Internal clock:
Internal clock:
0
1
Internal clock:
Internal clock:
0
1
0
1
0
1
0
0
1
1
0
0
1
1
0
0
0
0
1
1
1
1
Internal clock:
Internal clock:
Internal clock:
External event (TMIC): Counting
on rising or falling edge
*
Don't care
φ
/8192
φ
/2048
φ
/512
φ
/64
φ
/16
φ
/4
φ
w/4
0
Interval timer function selected
1
Auto-reload function selected
Counter up/down control
0
TCC is an up-counter
1
TCC is a down-counter
*
Hardware control of TCC up/down operation by UD pin input
UD pin input high: Down-counter
UD pin input low: Up-counter
0
0
1
Содержание H8/38342
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