PIC17C752 MICROCHIP [Microchip Technology], PIC17C752 Datasheet - Page 90

• Manufacturer Part Number: PIC17C752
• Description: High-Performance 8-Bit CMOS EPROM Microcontrollers
• Manufacturer: MICROCHIP [Microchip Technology]

FIGURE 12-5: TMR0 READ/WRITE IN TIMER MODE
TABLE 12-1:
DS30264A-page 90
Address
05h, Unbanked
06h, Unbanked
07h, Unbanked
0Bh, Unbanked
0Ch, Unbanked
Legend:
Note 1:
WR_TMR0H
WR_TRM0L
RD_TMR0L
x = unknown, u = unchanged, - = unimplemented read as a '0', q - value depends on condition, Shaded cells are not used by Timer0.
Other (non power-up) resets include: external reset through MCLR and the Watchdog Timer Reset.
AD15:AD0
Instruction
Instruction
executed
TMR0H
TMR0L
fetched
Name
T0STA
CPUSTA
INTSTA
TMR0L
TMR0H
ALE
REGISTERS/BITS ASSOCIATED WITH TIMER0
Q1
DATAL,TMR0L
TMR0 register; low byte
TMR0 register; high byte
Write TMR0L
INTEDG
Previously
Fetched
Instruction
Bit 7
PEIF
MOVFP
—
Q2 Q3
FE
12
In this example, old TMR0 value is 12FEh, new value of AB56h is written.
T0CKIF
Q4
T0SE
Bit 6
—
DATAH,TMR0H
Q1
Write TMR0H
DATAL,TMR0L
Write TMR0L
MOVFP
FF
Q2 Q3
MOVFP
12
STKAV
T0CS
Bit 5
T0IF
Preliminary
Q4
GLINTD
T0PS3
Q1
DATAH,TMR0H
Bit 4
INTF
Read TMR0L
Write TMR0H
TMR0L,W
13
56
MOVPF
MOVFP
Q2 Q3
T0PS2
Bit 3
PEIE
TO
Q4
Q1
Read TMR0L
T0CKIE
Read TMR0L
T0PS1
AB
TMR0L,W
Bit 2
TMR0L,W
MOVPF
PD
Q2 Q3
MOVPF
T0PS0
Q4
Bit 1
POR
T0IE
Q1
Read TMR0L
Read TMR0L
TMR0L,W
TMR0L,W
MOVPF
57
Q2 Q3
MOVPF
INTE
Bit 0
BOR
—
1997 Microchip Technology Inc.
Q4 Q1
0000 000-
--11 1100
0000 0000
xxxx xxxx
xxxx xxxx
Value on
POR,
BOR
Read TMR0L
Read TMR0L
TMR0L,W
TMR0L,W
58
MOVPF
Q2 Q3
MOVPF
other resets
Value on all
0000 000-
--11 qq11
0000 0000
uuuu uuuu
uuuu uuuu
Q4
(Note1)