Microchip Technology AC244045 Data Sheet

© 2009 Microchip Technology Inc.

DS41341E-page 125

The Timer1 Gate Control register (T1GCON), shown in
Register 12-2, is used to control Timer1 Gate.

 

R/W-0

R/W-0

R/W-0

R/W-0

R/W-0

R-x

R/W-0

R/W-0

TMR1GE

T1GPOL

T1GTM

T1GSPM

T1GGO/

DONE

T1GVAL

T1GSS1

T1GSS0

bit 7

bit 0

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 7

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

bit 6

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)

bit 5

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.

bit 4

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

bit 3

T1GGO/DONE: 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.

bit 2

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 1-0

T1GSS<1:0>: Timer1 Gate Source Select bits

00

 = Timer1 Gate pin

01

 = Timer0 Overflow output

10

 = TMR2 Match PR2 output

11

 = Watchdog Timer scaler overflow

Watchdog Timer oscillator is turned on if TMR1GE = 1, regardless of the state of TMR1ON