PIC16C926-I/CL Microchip Technology, PIC16C926-I/CL Datasheet - Page 49
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PIC16C926-I/CL
Manufacturer Part Number
PIC16C926-I/CL
Description
64/68-Pin CMOS Microcontrollers with LCD Driver
Manufacturer
Microchip Technology
Datasheet
1.PIC16C926-ICL.pdf
(182 pages)
- Current page: 49 of 182
- Download datasheet (4Mb)
6.0
Timer1 is a 16-bit timer/counter consisting of two 8-bit
registers (TMR1H and TMR1L), which are readable
and
(TMR1H:TMR1L) increments from 0000h to FFFFh
and rolls over to 0000h. The TMR1 Interrupt, if enabled,
is generated on overflow, which is latched in interrupt
flag bit, TMR1IF (PIR1<0>). This interrupt can be
enabled/disabled by setting/clearing TMR1 interrupt
enable bit, TMR1IE (PIE1<0>).
Timer1 can operate in one of two modes:
• As a timer
• As a counter
The operating mode is determined by the clock select
bit, TMR1CS (T1CON<1>).
REGISTER 6-1:
2001 Microchip Technology Inc.
writable.
TIMER1 MODULE
bit 7-6
bit 5-4
bit 3
bit 2
bit 1
bit 0
The
T1CON: TIMER1 CONTROL REGISTER (ADDRESS 10h)
Unimplemented: Read as '0'
T1CKPS1:T1CKPS0: 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
T1OSCEN: Timer1 Oscillator Enable Control bit
1 = Oscillator is enabled
0 = Oscillator is shut-off
Note: The oscillator inverter and feedback resistor are turned off to eliminate power drain.
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.
TMR1CS: Timer1 Clock Source Select bit
1 = External clock from pin T1CKI (on the rising edge)
0 = Internal clock (F
TMR1ON: Timer1 On bit
1 = Enables Timer1
0 = Stops Timer1
bit 7
Legend:
R = Readable bit
- n = Value at POR
U-0
—
TMR1
U-0
Register
—
OSC
T1CKPS1
/4)
R/W-0
pair
Preliminary
W = Writable bit
’1’ = Bit is set
T1CKPS0
R/W-0
In Timer mode, Timer1 increments every instruction
cycle. In Counter mode, it increments on every rising
edge of the external clock input.
Timer1 can be turned on and off using the control bit
TMR1ON (T1CON<0>).
Timer1 also has an internal “RESET input”. This
RESET can be generated by the CCP module
(Section 8.0). Register 6-1 shows the Timer1 control
register.
When the Timer1 oscillator is enabled (T1OSCEN is
set), the RC1/T1OSI and RC0/T1OSO/T1CKI pins
become inputs, regardless of the TRISC<1:0>. RC1
and RC0 will be read as ‘0’.
T1OSCEN T1SYNC TMR1CS TMR1ON
U = Unimplemented bit, read as ‘0’
’0’ = Bit is cleared
R/W-0
PIC16C925/926
R/W-0
x = Bit is unknown
R/W-0
DS39544A-page 47
R/W-0
bit 0
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