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PIC18F2455_07 Datasheet, PDF (53/430 Pages) Microchip Technology – 28/40/44-Pin, High Performance, Enhanced Flash, USB Microcontrollers with nanoWatt Technology
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PIC18F2455/2550/4455/4550
TABLE 4-4: INITIALIZATION CONDITIONS FOR ALL REGISTERS
Register
Applicable Devices
Power-on Reset,
Brown-out Reset
MCLR Resets,
WDT Reset,
RESET Instruction,
Stack Resets
Wake-up via WDT
or Interrupt
TOSU
TOSH
TOSL
STKPTR
2455 2550 4455 4550
2455 2550 4455 4550
2455 2550 4455 4550
2455 2550 4455 4550
---0 0000
0000 0000
0000 0000
00-0 0000
---0 0000
0000 0000
0000 0000
uu-0 0000
---0 uuuu(1)
uuuu uuuu(1)
uuuu uuuu(1)
uu-u uuuu(1)
PCLATU
2455 2550 4455 4550
---0 0000
---0 0000
---u uuuu
PCLATH
PCL
2455 2550 4455 4550
2455 2550 4455 4550
0000 0000
0000 0000
0000 0000
0000 0000
uuuu uuuu
PC + 2(3)
TBLPTRU
2455 2550 4455 4550
--00 0000
--00 0000
--uu uuuu
TBLPTRH
2455 2550 4455 4550
0000 0000
0000 0000
uuuu uuuu
TBLPTRL
2455 2550 4455 4550
0000 0000
0000 0000
uuuu uuuu
TABLAT
2455 2550 4455 4550
0000 0000
0000 0000
uuuu uuuu
PRODH
2455 2550 4455 4550
xxxx xxxx
uuuu uuuu
uuuu uuuu
PRODL
INTCON
INTCON2
INTCON3
2455 2550 4455 4550
2455 2550 4455 4550
2455 2550 4455 4550
2455 2550 4455 4550
xxxx xxxx
0000 000x
1111 -1-1
11-0 0-00
uuuu uuuu
0000 000u
1111 -1-1
11-0 0-00
uuuu uuuu
uuuu uuuu(2)
uuuu -u-u(2)
uu-u u-uu(2)
INDF0
2455 2550 4455 4550
N/A
N/A
N/A
POSTINC0 2455 2550 4455 4550
N/A
N/A
N/A
POSTDEC0 2455 2550 4455 4550
N/A
N/A
N/A
PREINC0
2455 2550 4455 4550
N/A
N/A
N/A
PLUSW0
2455 2550 4455 4550
N/A
N/A
N/A
FSR0H
2455 2550 4455 4550
---- 0000
---- 0000
---- uuuu
FSR0L
2455 2550 4455 4550
xxxx xxxx
uuuu uuuu
uuuu uuuu
WREG
2455 2550 4455 4550
xxxx xxxx
uuuu uuuu
uuuu uuuu
INDF1
2455 2550 4455 4550
N/A
N/A
N/A
POSTINC1 2455 2550 4455 4550
N/A
N/A
N/A
POSTDEC1 2455 2550 4455 4550
N/A
N/A
N/A
PREINC1
2455 2550 4455 4550
N/A
N/A
N/A
PLUSW1
2455 2550 4455 4550
N/A
N/A
N/A
FSR1H
2455 2550 4455 4550
---- 0000
---- 0000
---- uuuu
FSR1L
2455 2550 4455 4550
xxxx xxxx
uuuu uuuu
uuuu uuuu
BSR
2455 2550 4455 4550
---- 0000
---- 0000
---- uuuu
Legend:
Note 1:
2:
3:
4:
5:
u = unchanged, x = unknown, - = unimplemented bit, read as ‘0’, q = value depends on condition.
Shaded cells indicate conditions do not apply for the designated device.
When the wake-up is due to an interrupt and the GIEL or GIEH bit is set, the TOSU, TOSH and TOSL are
updated with the current value of the PC. The STKPTR is modified to point to the next location in the
hardware stack.
One or more bits in the INTCONx or PIRx registers will be affected (to cause wake-up).
When the wake-up is due to an interrupt and the GIEL or GIEH bit is set, the PC is loaded with the interrupt
vector (0008h or 0018h).
See Table 4-3 for Reset value for specific condition.
PORTA<6>, LATA<6> and TRISA<6> are enabled depending on the oscillator mode selected. When not
enabled as PORTA pins, they are disabled and read ‘0’.
© 2007 Microchip Technology Inc.
Preliminary
DS39632D-page 51
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