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PIC18LF4331 Datasheet(PDF) 137 Page - Microchip Technology

Part # PIC18LF4331
Description  28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High-Performance PWM and A/D
PDF  392 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC18LF4331 Datasheet(HTML) 137 Page - Microchip Technology

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 2010 Microchip Technology Inc.
DS39616D-page 137
PIC18F2331/2431/4331/4431
14.2
Timer2 Interrupt
Timer2 can also generate an optional device interrupt.
The Timer2 output signal (TMR2 to PR2 match) pro-
vides the input for the 4-bit output counter/postscaler.
This counter generates the TMR2 match interrupt flag
which is latched in TMR2IF (PIR1<1>).
The interrupt is enabled by setting the TMR2 Match
Interrupt Enable bit, TMR2IE (PIE1<1>). A range of
16 postscale options (from 1:1 through 1:16 inclusive)
can be selected with the postscaler control bits,
T2OUTPS<3:0> (T2CON<6:3>).
14.3
Output of TMR2
The unscaled output of TMR2 is available primarily to
the CCP modules, where it is used as a time base for
operations in PWM mode. Timer2 can be optionally
used as the shift clock source for the SSP module
operating in SPI mode.
For additional information, see Section 19.0
“Synchronous Serial Port (SSP) Module”
.
FIGURE 14-1:
TIMER2 BLOCK DIAGRAM
TABLE 14-1:
REGISTERS ASSOCIATED WITH TIMER2 AS A TIMER/COUNTER
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Reset Values
on Page:
INTCON
GIE/GIEH PEIE/GIEL
TMR0IE
INT0IE
RBIE
TMR0IF
INT0IF
RBIF
54
PIR1
—
ADIF
RCIF
TXIF
SSPIF
CCP1IF
TMR2IF
TMR1IF
57
PIE1
—
ADIE
RCIE
TXIE
SSPIE
CCP1IE
TMR2IE
TMR1IE
57
IPR1
—
ADIP
RCIP
TXIP
SSPIP
CCP1IP
TMR2IP
TMR1IP
57
TMR2
Timer2 Register
55
T2CON
—
TOUTPS3 TOUTPS2 TOUTPS1 TOUTPS0 TMR2ON T2CKPS1 T2CKPS0
55
PR2
Timer2 Period Register
55
Legend:
— = unimplemented, read as ‘0’. Shaded cells are not used by the Timer2 module.
Comparator
TMR2 Output
TMR2
Postscaler
Prescaler
PR2
2
FOSC/4
1:1 to 1:16
1:1, 1:4, 1:16
4
T2OUTPS<3:0>
T2CKPS<1:0>
Set TMR2IF
Internal Data Bus
8
Reset
TMR2/PR2
8
8
(to PWM or SSP)
Match



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