Single-Chip Microcontrollers User's Manual

241
CHAPTER 10 WATCH TIMER
TMC21
Prescaler
Selector
INTWT
5-Bit Counter
f
W
2
14
f W
2
13
INTTM3
To 16-Bit Timer
/
Event Counter
Watch Timer Mode
Control Register
TMC26 TMC25
TMC24 TMC23 TMC22 TMC21 TMC20
Internal Bus
TCL24
Timer Clock
Select Register 2
3
f W
2
4
f W
2
5
f W
2
6
f W
2
7
f W
2
8
f W
2
9
f W
f XX /2
7
f XT
Clear
Clear
Selector
Selector
Selector
Figure 10-1. Watch Timer Block Diagram