Microchip Technology AC160214 Data Sheet
2010-2012 Microchip Technology Inc.
DS41414D-page 207
PIC16(L)F1946/47
21.11 Register Definitions: Timer1 Control
REGISTER 21-1:
T1CON: TIMER1 CONTROL REGISTER
R/W-0/u
R/W-0/u
R/W-0/u
R/W-0/u
R/W-0/u
R/W-0/u
U-0
R/W-0/u
TMR1CS<1:0>
T1CKPS<1:0>
T1OSCEN
T1SYNC
—
TMR1ON
bit 7
bit 0
Legend:
R = Readable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-6
TMR1CS<1:0>:
Timer1 Clock Source Select bits
11 = Timer1 clock source is Capacitive Sensing Oscillator (CAPOSC)
10 = Timer1 clock source is pin or oscillator:
10 = Timer1 clock source is pin or oscillator:
If T1OSCEN = 0:
External clock from T1CKI pin (on the rising edge)
If T1OSCEN = 1:
Crystal oscillator on T1OSI/T1OSO pins
External clock from T1CKI pin (on the rising edge)
If T1OSCEN = 1:
Crystal oscillator on T1OSI/T1OSO pins
01 = Timer1 clock source is system clock (F
OSC
)
00 = Timer1 clock source is instruction clock (F
OSC
/4)
bit 5-4
T1CKPS<1:0>:
Timer1 Input Clock Prescale Select bits
11 = 1:8 Prescale value
10 = 1:4 Prescale value
01 = 1:2 Prescale value
00 = 1:1 Prescale value
10 = 1:4 Prescale value
01 = 1:2 Prescale value
00 = 1:1 Prescale value
bit 3
T1OSCEN:
LP Oscillator Enable Control bit
1 = Dedicated Timer1 oscillator circuit enabled
0 = Dedicated Timer1 oscillator circuit disabled
0 = Dedicated Timer1 oscillator circuit disabled
bit 2
T1SYNC:
Timer1 Synchronization Control bit
1 = Do not synchronize asynchronous clock input
0 = Synchronize asynchronous clock input with system clock (F
0 = Synchronize asynchronous clock input with system clock (F
OSC
)
bit 1
Unimplemented:
Read as ‘0’
bit 0
TMR1ON:
Timer1 On bit
1 = Enables Timer1
0 = Stops Timer1 and clears Timer1 gate flip-flop
0 = Stops Timer1 and clears Timer1 gate flip-flop