PIC18F258 MICROCHIP [Microchip Technology], PIC18F258 Datasheet - Page 118
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PIC18F258
Manufacturer Part Number
PIC18F258
Description
High Performance, 28/40-Pin Enhanced FLASH Microcontrollers with CAN
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18F258.pdf
(384 pages)
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PIC18FXX8
13.2
The Timer2 module has an 8-bit period register, PR2.
Timer2 increments from 00h until it matches PR2 and
then resets to 00h on the next increment cycle. PR2 is
a readable and writable register. The PR2 register is
initialized to FFh upon RESET.
FIGURE 13-1:
TABLE 13-1:
DS41159B-page 116
INTCON GIE/GIEH PEIE/GIEL
PIR1
PIE1
IPR1
TMR2
T2CON
PR2
Legend: x = unknown, u = unchanged, - = unimplemented, read as '0'. Shaded cells are not used by the Timer2 module.
Name
Timer2 Interrupt
Timer2 Module Register
Timer2 Period Register
Note 1: TMR2 register output can be software selected by the SSP Module as a baud clock.
F
PSPIF
PSPIE
PSPIP
Bit 7
OSC
—
/4
REGISTERS ASSOCIATED WITH TIMER2 AS A TIMER/COUNTER
TOUTPS3 TOUTPS2 TOUTPS1 TOUTPS0 TMR2ON T2CKPS1 T2CKPS0 -000 0000 -000 0000
TIMER2 BLOCK DIAGRAM
ADIF
ADIE
ADIP
Bit 6
T2CKPS1:T2CKPS0
1:1, 1:4, 1:16
Prescaler
TMR0IE
RCIE
RCIP
RCIF
Bit 5
2
INT0IE
Bit 4
TXIF
TXIE
TXIP
Comparator
Preliminary
TMR2
PR2
SSPIE
SSPIP
SSPIF
RBIE
Bit 3
RESET
EQ
13.3
The output of TMR2 (before the postscaler) is a clock
input to the Synchronous Serial Port module, which
optionally uses it to generate the shift clock.
TMR0IF
CCP1IE
CCP1IP
CCP1IF
TOUTPS3:TOUTPS0
Bit 2
Postscaler
1:1 to 1:16
Output of TMR2
TMR2IF
TMR2IE
TMR2IP
TMR2
Output
INT0IF
4
Bit 1
(1)
TMR1IE
TMR1IP
TMR1IF
Bit 0
RBIF
2002 Microchip Technology Inc.
Sets Flag
bit TMR2IF
0000 000x 0000 000u
0000 0000 0000 0000
0000 0000 0000 0000
0000 0000 0000 0000
0000 0000 0000 0000
1111 1111 1111 1111
POR, BOR
Value on
Value on
RESETS
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