PIC18F-LF1XK50 MICROCHIP [Microchip Technology], PIC18F-LF1XK50 Datasheet - Page 112

• Manufacturer Part Number: PIC18F-LF1XK50
• Description: 20-Pin USB Flash Microcontrollers
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18F/LF1XK50
12.2
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 of the PIR1 register. The
interrupt is enabled by setting the TMR2 Match Inter-
rupt Enable bit, TMR2IE of the PIE1 register.
A range of 16 postscale options (from 1:1 through 1:16
inclusive) can be selected with the postscaler control
bits, T2OUTPS<3:0> of the T2CON register.
FIGURE 12-1:
TABLE 12-1:
DS41350E-page 112
INTCON GIE/GIEH PEIE/GIEL
PIR1
PIE1
IPR1
TMR2
T2CON
PR2
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used by the Timer2 module.
Name
T2OUTPS<3:0>
T2CKPS<1:0>
F
OSC
Timer2 Interrupt
/4
Timer2 Register
Timer2 Period Register
Bit 7
—
—
—
—
REGISTERS ASSOCIATED WITH TIMER2 AS A TIMER/COUNTER
TIMER2 BLOCK DIAGRAM
T2OUTPS3 T2OUTPS2 T2OUTPS1 T2OUTPS0 TMR2ON T2CKPS1 T2CKPS0
Internal Data Bus
1:1, 1:4, 1:16
ADIE
ADIP
ADIF
Bit 6
2
Prescaler
TMR0IE
RCIF
RCIE
RCIP
Bit 5
4
TMR2
INT0IE
TXIE
TXIP
Bit 4
TXIF
Preliminary
Reset
8
RABIE
SSPIE
SSPIP
SSPIF
Bit 3
12.3
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 MSSP module operating in SPI mode. Addi-
tional information is provided in Section 14.0 “Master
Synchronous Serial Port (MSSP) Module”.
Comparator
1:1 to 1:16
Postscaler
8
TMR2/PR2
Match
Timer2 Output
TMR0IF
CCP1IF
CCP1IE
CCP1IP
Bit 2
TMR2IF
TMR2IE
TMR2IP
INT0IF
 2010 Microchip Technology Inc.
Bit 1
PR2
8
Set TMR2IF
TMR2 Output
(to PWM or MSSP)
TMR1IF
TMR1IE
TMR1IP
RABIF
Bit 0
on page
Values
Reset
285
288
288
288
286
286
286