PIC18F25K20T-ISS Datasheet, PDF(59/456 Page) Microchip Technology – 28/40/44-Pin Flash Microcontrollers with nanoWatt XLP Technology

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PIC18F25K20T-ISS Datasheet, PDF (59/456 Pages) Microchip Technology – 28/40/44-Pin Flash Microcontrollers with nanoWatt XLP Technology

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PIC18F2XK20/4XK20

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

PIC18F2XK20 PIC18F4XK20

PIC18F2XK20 PIC18F4XK20

PIC18F2XK20 PIC18F4XK20

PIC18F2XK20 PIC18F4XK20

---0 0000

0000 0000

0000 0000

00-0 0000

---0 0000

0000 0000

0000 0000

uu-0 0000

---0 uuuu(3)

uuuu uuuu(3)

uuuu uuuu(3)

uu-u uuuu(3)

PCLATU

PIC18F2XK20 PIC18F4XK20

---0 0000

---0 0000

---u uuuu

PCLATH

PCL

PIC18F2XK20 PIC18F4XK20

PIC18F2XK20 PIC18F4XK20

0000 0000

0000 0000

0000 0000

0000 0000

uuuu uuuu

PC + 2(2)

TBLPTRU

PIC18F2XK20 PIC18F4XK20

--00 0000

--00 0000

--uu uuuu

TBLPTRH

PIC18F2XK20 PIC18F4XK20

0000 0000

0000 0000

uuuu uuuu

TBLPTRL

PIC18F2XK20 PIC18F4XK20

0000 0000

0000 0000

uuuu uuuu

TABLAT

PIC18F2XK20 PIC18F4XK20

0000 0000

0000 0000

uuuu uuuu

PRODH

PIC18F2XK20 PIC18F4XK20

xxxx xxxx

uuuu uuuu

uuuu uuuu

PRODL

INTCON

INTCON2

INTCON3

PIC18F2XK20 PIC18F4XK20

PIC18F2XK20 PIC18F4XK20

PIC18F2XK20 PIC18F4XK20

PIC18F2XK20 PIC18F4XK20

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(1)

uuuu -u-u(1)

uu-u u-uu(1)

INDF0

PIC18F2XK20 PIC18F4XK20

N/A

N/A

N/A

POSTINC0

PIC18F2XK20 PIC18F4XK20

N/A

N/A

N/A

POSTDEC0

PIC18F2XK20 PIC18F4XK20

N/A

N/A

N/A

PREINC0

PIC18F2XK20 PIC18F4XK20

N/A

N/A

N/A

PLUSW0

PIC18F2XK20 PIC18F4XK20

N/A

N/A

N/A

FSR0H

PIC18F2XK20 PIC18F4XK20

---- 0000

---- 0000

---- uuuu

FSR0L

PIC18F2XK20 PIC18F4XK20

xxxx xxxx

uuuu uuuu

uuuu uuuu

WREG

PIC18F2XK20 PIC18F4XK20

xxxx xxxx

uuuu uuuu

uuuu uuuu

INDF1

PIC18F2XK20 PIC18F4XK20

N/A

N/A

N/A

POSTINC1

PIC18F2XK20 PIC18F4XK20

N/A

N/A

N/A

POSTDEC1

PIC18F2XK20 PIC18F4XK20

N/A

N/A

N/A

PREINC1

PIC18F2XK20 PIC18F4XK20

N/A

N/A

N/A

PLUSW1

PIC18F2XK20 PIC18F4XK20

N/A

N/A

N/A

Legend:

Note 1:

2:

3:

4:

5:

6:

u = unchanged, x = unknown, - = unimplemented bit, read as â0â, q = value depends on condition.

Shaded cells indicate conditions do not apply for the designated device.

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).

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.

See Table 4-3 for Reset value for specific condition.

Bits 6 and 7 of PORTA, LATA and TRISA are enabled, depending on the oscillator mode selected. When not enabled as

PORTA pins, they are disabled and read â0â.

All bits of the ANSELH register initialize to â0â if the PBADEN bit of CONFIG3H is â0â.

ï£ 2010 Microchip Technology Inc.

DS41303G-page 59

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