Datasheet

PIC18F46J11 FAMILY
DS39932D-page 216  2011 Microchip Technology Inc.
15.1 Timer3 Gate Control Register
The Timer3 Gate Control register (T3GCON), provided
in Register 14-2, is used to control the Timer3 gate.
REGISTER 15-2: T3GCON: TIMER3 GATE CONTROL REGISTER (ACCESS F97h)
(1)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R-x R/W-0 R/W-0
TMR3GE T3GPOL T3GTM T3GSPM T3GGO/T3DONE
T3GVAL T3GSS1 T3GSS0
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 TMR3GE: Timer3 Gate Enable bit
If TMR3ON =
0:
This bit is ignored.
If TMR3ON =
1:
1 = Timer3 counting is controlled by the Timer3 gate function
0 = Timer3 counts regardless of Timer3 gate function
bit 6 T3GPOL: Timer3 Gate Polarity bit
1 = Timer3 gate is active-high (Timer3 counts when gate is high)
0 = Timer3 gate is active-low (Timer3 counts when gate is low)
bit 5 T3GTM: Timer3 Gate Toggle Mode bit
1 = Timer3 Gate Toggle mode is enabled
0 = Timer3 Gate Toggle mode is disabled and toggle flip-flop is cleared
Timer3 gate flip-flop toggles on every rising edge.
bit 4 T3GSPM: Timer3 Gate Single Pulse Mode bit
1 = Timer3 Gate Single Pulse mode is enabled and is controlling Timer3 gate
0 = Timer3 Gate Single Pulse mode is disabled
bit 3 T3GGO/T3DO
NE: Timer3 Gate Single Pulse Acquisition Status bit
1 = Timer3 gate single pulse acquisition is ready, waiting for an edge
0 = Timer3 gate single pulse acquisition has completed or has not been started
This bit is automatically cleared when T3GSPM is cleared.
bit 2 T3GVAL: Timer3 Gate Current State bit
Indicates the current state of the Timer3 gate that could be provided to TMR3H:TMR3L. Unaffected by
Timer3 Gate Enable bit (TMR3GE).
bit 1-0 T3GSS<1:0>: Timer3 Gate Source Select bits
10 = TMR2 to match PR2 output
01 = Timer0 overflow output
00 = Timer3 gate pin (T3G)
Note 1: Programming the T3GCON prior to T3CON is recommended.