PIC16F87X Datasheet, PDF (58/218 Pages) Microchip Technology – 28/40-pin 8-Bit CMOS FLASH Microcontrollers

PIC16F87X
7.1 Timer2 Prescaler and Postscaler
The prescaler and postscaler counters are cleared
when any of the following occurs:
• a write to the TMR2 register
• a write to the T2CON register
• any device RESET (POR, MCLR Reset, WDT
Reset, or BOR)
TMR2 is not cleared when T2CON is written.
7.2 Output of TMR2
The output of TMR2 (before the postscaler) is fed to the
SSP module, which optionally uses it to generate shift
clock.
TABLE 7-1: REGISTERS ASSOCIATED WITH TIMER2 AS A TIMER/COUNTER
Address Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on:
POR,
BOR
Value on
all other
RESETS
0Bh,8Bh, INTCON
10Bh,18Bh
0Ch
PIR1
8Ch
PIE1
GIE
PSPIF⁽¹⁾
PSPIE⁽¹⁾
PEIE
ADIF
ADIE
T0IE
RCIF
RCIE
INTE
TXIF
TXIE
RBIE
T0IF
INTF
RBIF 0000 000x 0000 000u
SSPIF
SSPIE
CCP1IF TMR2IF TMR1IF 0000 0000 0000 0000
CCP1IE TMR2IE TMR1IE 0000 0000 0000 0000
11h
TMR2
Timer2 Module’s Register
0000 0000 0000 0000
12h
T2CON
—
TOUTPS3 TOUTPS2 TOUTPS1 TOUTPS0 TMR2ON T2CKPS1 T2CKPS0 -000 0000 -000 0000
92h
PR2
Timer2 Period Register
1111 1111 1111 1111
Legend: x = unknown, u = unchanged, - = unimplemented, read as '0'. Shaded cells are not used by the Timer2 module.
Note 1: Bits PSPIE and PSPIF are reserved on the PIC16F873/876; always maintain these bits clear.
DS30292C-page 56
 2001 Microchip Technology Inc.