Datasheet

PIC16F87/88
DS30487D-page 72  2002-2013 Microchip Technology Inc.
REGISTER 7-1: T1CON: TIMER1 CONTROL REGISTER (ADDRESS 10h)
U-0 R-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— T1RUN T1CKPS1 T1CKPS0 T1OSCEN T1SYNC TMR1CS TMR1ON
bit 7 bit 0
bit 7 Unimplemented: Read as ‘0’
bit 6 T1RUN: Timer1 System Clock Status bit
1 = System clock is derived from Timer1 oscillator
0 = System clock is derived from another source
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
bit 3 T1OSCEN: Timer1 Oscillator Enable Control bit
1 = Oscillator is enabled
0 = Oscillator is shut off (the oscillator inverter is turned off to eliminate power drain)
bit 2 T1SYNC
: Timer1 External Clock Input Synchronization Control bit
TMR1CS = 1:
1 = Do not synchronize external clock input
0 = Synchronize external clock input
TMR1CS =
0:
This bit is ignored. Timer1 uses the internal clock when TMR1CS = 0.
bit 1 TMR1CS: Timer1 Clock Source Select bit
1 = External clock from pin RB6/AN5
(1)
/PGC/T1OSO/T1CKI (on the rising edge)
0 = Internal clock (F
OSC/4)
Note 1: Available on PIC16F88 devices only.
bit 0 TMR1ON: Timer1 On bit
1 = Enables Timer1
0 = Stops Timer1
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