Datasheet

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
φw/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