PIC18F23K22 Datasheet, PDF (170/492 Pages) Microchip Technology – 28/40/44-Pin, Low-Power, High-Performance Microcontrollers with nanoWatt XLP Technology

PIC18(L)F2X/4XK22
12.13 Timer1/3/5 Control Register
The Timer1/3/5 Control register (TxCON), shown in
Register 12-1, is used to control Timer1/3/5 and select
the various features of the Timer1/3/5 module.
REGISTER 12-1: TXCON: TIMER1/3/5 CONTROL REGISTER
R/W-0/u
R/W-0/u
TMRxCS<1:0>
bit 7
R/W-0/u
R/W-0/u
TxCKPS<1:0>
R/W-0/u
TxSOSCEN
R/W-0/u
TxSYNC
R/W-0/0
TxRD16
R/W-0/u
TMRxON
bit 0
Legend:
R = Readable bit
u = Bit is unchanged
‘1’ = Bit is set
W = Writable bit
x = Bit is unknown
‘0’ = Bit is cleared
U = Unimplemented bit, read as ‘0’
-n/n = Value at POR and BOR/Value at all other Resets
bit 7-6
bit 5-4
bit 3
bit 2
bit 1
bit 0
TMRxCS<1:0>: Timer1/3/5 Clock Source Select bits
11 = Reserved. Do not use.
10 = Timer1/3/5 clock source is pin or oscillator:
If TxSOSCEN = 0:
External clock from TxCKI pin (on the rising edge)
If TxSOSCEN = 1:
Crystal oscillator on SOSCI/SOSCO pins
01 = Timer1/3/5 clock source is system clock (FOSC)
00 = Timer1/3/5 clock source is instruction clock (FOSC/4)
TxCKPS<1:0>: Timer1/3/5 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
TxSOSCEN: Secondary Oscillator Enable Control bit
1 = Dedicated Secondary oscillator circuit enabled
0 = Dedicated Secondary oscillator circuit disabled
TxSYNC: Timer1/3/5 External Clock Input Synchronization Control bit
TMRxCS<1:0> = 1X
1 = Do not synchronize external clock input
0 = Synchronize external clock input with system clock (FOSC)
TMRxCS<1:0> = 0X
This bit is ignored. Timer1/3/5 uses the internal clock when TMRxCS<1:0> = 1X.
TxRD16: 16-Bit Read/Write Mode Enable bit
1 = Enables register read/write of Timer1/3/5 in one 16-bit operation
0 = Enables register read/write of Timer1/3/5 in two 8-bit operation
TMRxON: Timer1/3/5 On bit
1 = Enables Timer1/3/5
0 = Stops Timer1/3/5
Clears Timer1/3/5 Gate flip-flop
DS41412B-page 170
Preliminary
 2010 Microchip Technology Inc.