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Sheet目录3840

122页 123页 124页 125页 [126页]127页 128页 129页 130页

2010-2012 Microchip Technology Inc.

DS39977F-page 211

PIC18F66K80 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

R-x

R/W-0

TMR1GE

T1GPOL

T1GTM

T1GSPM

T1GGO/T1DONE

T1GVAL

T1GSS1

T1GSS0

bit 7

bit 0

Legend:

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:

= Timer1 counting is controlled by the Timer1 gate function

= Timer1 counts regardless of Timer1 gate function

bit 6

T1GPOL:

Timer1 Gate Polarity bit

= Timer1 gate is active-high (Timer1 counts when gate is high)

= Timer1 gate is active-low (Timer1 counts when gate is low)

bit 5

T1GTM:

Timer1 Gate Toggle Mode bit

= Timer1 Gate Toggle mode is enabled

= 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

= Timer1 Gate Single Pulse mode is enabled and is controlling Timer1 gate

= Timer1 Gate Single Pulse mode is disabled

bit 3

T1GGO/T1DONE:

Timer1 Gate Single Pulse Acquisition Status bit

= Timer1 gate single pulse acquisition is ready, waiting for an edge

= 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.

bit 1-0

T1GSS<1:0>:

Timer1 Gate Source Select bits

= Comparator 2 output

= Comparator 1 output

= TMR2 to match PR2 output

= Timer1 gate pin

Note 1:

Programming the T1GCON prior to T1CON is recommended.

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