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8XC251SA, SB, SP, SQ USER'S MANUAL
8.2
TIMER/COUNTER OPERATION................................................................................... 8-1
8.3
TIMER 0......................................................................................................................... 8-3
8.3.1
Mode 0 (13-bit Timer) ...............................................................................................8-4
8.3.2
Mode 1 (16-bit Timer) ...............................................................................................8-4
8.3.3
Mode 2 (8-bit Timer With Auto-reload) ......................................................................8-5
8.3.4
Mode 3 (Two 8-bit Timers) ........................................................................................8-5
8.4
TIMER 1......................................................................................................................... 8-5
8.4.1
Mode 0 (13-bit Timer) ...............................................................................................8-9
8.4.2
Mode 1 (16-bit Timer) ...............................................................................................8-9
8.4.3
Mode 2 (8-bit Timer with Auto-reload) .......................................................................8-9
8.4.4
Mode 3 (Halt) ............................................................................................................8-9
8.5
TIMER 0/1 APPLICATIONS........................................................................................... 8-9
8.5.1
Auto-load Setup Example .........................................................................................8-9
8.5.2
Pulse Width Measurements ....................................................................................8-10
8.6
TIMER 2....................................................................................................................... 8-10
8.6.1
Capture Mode .........................................................................................................8-11
8.6.2
Auto-reload Mode ...................................................................................................8-12
8.6.2.1
Up Counter Operation ........................................................................................8-12
8.6.2.2
Up/Down Counter Operation ..............................................................................8-13
8.6.3
Baud Rate Generator Mode ....................................................................................8-14
8.6.4
Clock-out Mode .......................................................................................................8-14
8.7
WATCHDOG TIMER ................................................................................................... 8-16
8.7.1
Description ..............................................................................................................8-16
8.7.2
Using the WDT ........................................................................................................8-18
8.7.3
WDT During Idle Mode ...........................................................................................8-18
8.7.4
WDT During PowerDown ........................................................................................8-18
CHAPTER 9
9.1
PCA DESCRIPTION ...................................................................................................... 9-1
9.1.1
Alternate Port Usage .................................................................................................9-2
9.2
PCA TIMER/COUNTER................................................................................................. 9-2
9.3
PCA COMPARE/CAPTURE MODULES ....................................................................... 9-5
9.3.1
16-bit Capture Mode .................................................................................................9-5
9.3.2
Compare Modes .......................................................................................................9-7
9.3.3
16-bit Software Timer Mode ......................................................................................9-7
9.3.4
High-speed Output Mode ..........................................................................................9-8
9.3.5
PCA Watchdog Timer Mode .....................................................................................9-9
9.3.6
Pulse Width Modulation Mode ................................................................................9-11
CHAPTER 10
10.1
OVERVIEW ................................................................................................................. 10-1
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