PIC18F87K22 Datasheet, PDF (196/548 Pages) Microchip Technology – 64/80-Pin, High-Performance, 1-Mbit Enhanced Flash Microcontrollers with 12-Bit A/D and nanoWatt XLP Technology

PIC18F87K22 FAMILY
14.1 Timer1 Gate Control Register
The Timer1 Gate Control register (T1GCON),
displayed in Register 14-2, is used to control the
Timer1 gate.
REGISTER 14-2: T1GCON: TIMER1 GATE CONTROL REGISTER⁽¹⁾
R/W-0
TMR1GE
bit 7
R/W-0
T1GPOL
R/W-0
T1GTM
R/W-0
R/W-0
T1GSPM T1GGO/T1DONE
R-x
T1GVAL
R/W-0
T1GSS1
R/W-0
T1GSS0
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
TMR1GE: Timer1 Gate Enable bit
If TMR1ON = 0:
This bit is ignored.
If TMR1ON = 1:
1 = Timer1 counting is controlled by the Timer1 gate function
0 = Timer1 counts regardless of Timer1 gate function
T1GPOL: Timer1 Gate Polarity bit
1 = Timer1 gate is active-high (Timer1 counts when gate is high)
0 = Timer1 gate is active-low (Timer1 counts when gate is low)
T1GTM: Timer1 Gate Toggle Mode bit
1 = Timer1 Gate Toggle mode is enabled
0 = Timer1 Gate Toggle mode is disabled and toggle flip-flop is cleared
Timer1 gate flip-flop toggles on every rising edge.
T1GSPM: Timer1 Gate Single Pulse Mode bit
1 = Timer1 Gate Single Pulse mode is enabled and is controlling Timer1 gate
0 = Timer1 Gate Single Pulse mode is disabled
T1GGO/T1DONE: Timer1 Gate Single Pulse Acquisition Status bit
1 = Timer1 gate single pulse acquisition is ready, waiting for an edge
0 = Timer1 gate single pulse acquisition has completed or has not been started
This bit is automatically cleared when T1GSPM is cleared.
T1GVAL: Timer1 Gate Current State bit
Indicates the current state of the Timer1 gate that could be provided to TMR1H:TMR1L; unaffected by
Timer1 Gate Enable (TMR1GE) bit.
T1GSS<1:0>: Timer1 Gate Source Select bits
11 = Comparator 2 output
10 = Comparator 1 output
01 = TMR2 to match PR2 output
00 = Timer1 gate pin
Note 1: Programming the T1GCON prior to T1CON is recommended.
DS39960B-page 196
Preliminary
 2010 Microchip Technology Inc.