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PIC16F87XATI/SP Datasheet - Page 60

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PIC16F87XA
6.7
Resetting of Timer1 Register Pair
(TMR1H, TMR1L)
TMR1H and TMR1L registers are not reset to 00h on a
POR, or any other Reset, except by the CCP1 and
CCP2 special event triggers.
T1CON register is reset to 00h on a Power-on Reset,
or a Brown-out Reset, which shuts off the timer and
leaves a 1:1 prescale. In all other Resets, the register
is unaffected.
TABLE 6-2:
REGISTERS ASSOCIATED WITH TIMER1 AS A TIMER/COUNTER
Address
Name
Bit 7
Bit 6
0Bh,8Bh,
INTCON
GIE
PEIE
TMR0IE
10Bh, 18Bh
(1)
0Ch
PIR1
PSPIF
ADIF
(1)
8Ch
PIE1
PSPIE
ADIE
0Eh
TMR1L
Holding Register for the Least Significant Byte of the 16-bit TMR1 Register
0Fh
TMR1H Holding Register for the Most Significant Byte of the 16-bit TMR1 Register
10h
T1CON
T1CKPS1 T1CKPS0 T1OSCEN T1SYNC TMR1CS TMR1ON --00 0000 --uu uuuu
Legend:
x = unknown, u = unchanged, - = unimplemented, read as ‘0’. Shaded cells are not used by the Timer1 module.
Note 1:
Bits PSPIE and PSPIF are reserved on the 28-pin devices; always maintain these bits clear.
DS39582C-page 60
6.8
Timer1 Prescaler
The prescaler counter is cleared on writes to the
TMR1H or TMR1L registers.
Bit 5
Bit 4
Bit 3
Bit 2
INTE
RBIE
TMR0IF
RCIF
TXIF
SSPIF
CCP1IF
RCIE
TXIE
SSPIE
CCP1IE
Value on
Value on:
Bit 1
Bit 0
all other
POR, BOR
Resets
INTF
RBIF
0000 000x 0000 000u
TMR2IF
TMR1IF 0000 0000 0000 0000
TMR2IE
TMR1IE 0000 0000 0000 0000
xxxx xxxx uuuu uuuu
xxxx xxxx uuuu uuuu
 2001-2013 Microchip Technology Inc.

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