PIC18F87K22 Datasheet, PDF (211/548 Pages) Microchip Technology – 64/80-Pin, High-Performance, 1-Mbit Enhanced Flash Microcontrollers with 12-Bit A/D and nanoWatt XLP Technology

PIC18F87K22 FAMILY
16.1 Timer3/5/7 Gate Control Register
The Timer3/5/7 Gate Control register (TxGCON),
provided in Register 14-2, is used to control the Timerx
gate.
REGISTER 16-2: TxGCON: TIMERx GATE CONTROL REGISTER⁽¹⁾
R/W-0
TMRxGE
bit 7
R/W-0
TxGPOL
R/W-0
TxGTM
R/W-0
R/W-0
TxGSPM TxGGO/TxDONE
R-x
TxGVAL
R/W-0
TxGSS1
R/W-0
TxGSS0
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1-0
TMRxGE: Timerx Gate Enable bit
If TMRxON = 0:
This bit is ignored.
If TMRxON = 1:
1 = Timerx counting is controlled by the Timerx gate function
0 = Timerx counts regardless of Timerx gate function
TxGPOL: Timerx Gate Polarity bit
1 = Timerx gate is active-high (Timerx counts when gate is high)
0 = Timerx gate is active-low (Timerx counts when gate is low)
TxGTM: Timerx Gate Toggle Mode bit
1 = Timerx Gate Toggle mode is enabled.
0 = Timerx Gate Toggle mode is disabled and toggle flip-flop is cleared
Timerx gate flip-flop toggles on every rising edge.
TxGSPM: Timerx Gate Single Pulse Mode bit
1 = Timerx Gate Single Pulse mode is enabled and is controlling Timerx gate
0 = Timerx Gate Single Pulse mode is disabled
TxGGO/TxDONE: Timerx Gate Single Pulse Acquisition Status bit
1 = Timerx gate single pulse acquisition is ready, waiting for an edge
0 = Timerx gate single pulse acquisition has completed or has not been started
This bit is automatically cleared when TxGSPM is cleared.
TxGVAL: Timerx Gate Current State bit
Indicates the current state of the Timerx gate that could be provided to TMRxH:TMRxL. Unaffected by the
Timerx Gate Enable (TMRxGE) bit.
TxGSS<1:0>: Timerx Gate Source Select bits
11 = Comparator 2 output
10 = Comparator 1 output
01 = TMR(x+1) to match PR(x+1) output⁽²⁾
00 = Timer1 gate pin
The Watchdog Timer oscillator is turned on if TMRxGE = 1, regardless of the state of TMRxON.
Note 1: Programming the TxGCON prior to TxCON is recommended.
2: Timer(x+1) will be Timer4/6/8 for Timerx (Timer3/5/7), respectively.
 2010 Microchip Technology Inc.
Preliminary
DS39960B-page 211