PIC16F1847_13 Datasheet, PDF (177/440 Pages) Microchip Technology – 18/20/28-Pin Flash Microcontrollers with XLP Technology

PIC16(L)F1847
21.0 TIMER1 MODULE WITH GATE
CONTROL
The Timer1 module is a 16-bit timer/counter with the
following features:
• 16-bit timer/counter register pair (TMR1H:TMR1L)
• Programmable internal or external clock source
• 2-bit prescaler
• Dedicated 32 kHz oscillator circuit
• Optionally synchronized comparator out
• Multiple Timer1 gate (count enable) sources
• Interrupt on overflow
• Wake-up on overflow (external clock,
Asynchronous mode only)
• Time base for the Capture/Compare function
• Special Event Trigger (with CCP/ECCP)
• Selectable Gate Source Polarity
FIGURE 21-1:
TIMER1 BLOCK DIAGRAM
• Gate Toggle Mode
• Gate Single-pulse Mode
• Gate Value Status
• Gate Event Interrupt
Figure 21-1 is a block diagram of the Timer1 module.
T1GSS<1:0>
T1G
00
T1GSPM
From Timer0
Overflow
01
sync_C1OUT
10
sync_C2OUT
11
T1GPOL
T1G_IN
TMR1ON
T1GTM
DQ
CK ^Q
R
Set flag bit
TMR1IF on
Overflow
TMR1⁽²⁾
TMR1H
TMR1L
0
Single Pulse
Acq. Control
1
T1GGO/DONE
0
T1GVAL
DQ
1
Q1 EN
Interrupt
det
Data Bus
RD
T1GCON
Set
TMR1GIF
EN
QD
T1CLK
TMR1ON
0
TMR1GE
To Comparator Module
Synchronized
clock input
T1OSO
T1OSI
T1OSCEN
T1CKI
OUT
T1OSC
EN
(1)
TMR1CS<1:0>
Cap. Sensing
Oscillator ¹¹
1
10
0
FOSC
Internal ⁰¹
Clock
FOSC/4
Internal ⁰⁰
Clock
1
T1SYNC
Prescaler
1, 2, 4, 8
2
T1CKPS<1:0>
Synchronize⁽³⁾
det
FOSC/2
Internal
Clock
Sleep input
To Clock Switching Modules
Note 1: ST Buffer is high speed type when using T1CKI.
2: Timer1 register increments on rising edge.
3: Synchronize does not operate while in Sleep.
 2011-2013 Microchip Technology Inc.
Preliminary
DS40001453D-page 177