Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsMicrocontrollers, Microprocessors & QuartzesEmbedded microcontroller QFN 44 (8x8) 8-Bit 48 MHz I/O number 35

PIC18F2455/2550/4455/4550

TABLE 4-4: INITIALIZATION CONDITIONS FOR ALL REGISTERS

Power-on Reset,

Brown-out Reset

MCLR

Resets,

WDT Reset,

RESET Instruction,

Stack Resets

Wake-up via WDT

or Interrupt

TOSU 2455 2550 4455 4550 ---0 0000 ---0 0000 ---0 uuuu

(1)

TOSH 2455 2550 4455 4550 0000 0000 0000 0000 uuuu uuuu

(1)

TOSL 2455 2550 4455 4550 0000 0000 0000 0000 uuuu uuuu

(1)

STKPTR 2455 2550 4455 4550 00-0 0000 uu-0 0000 uu-u uuuu

(1)

PCLATU 2455 2550 4455 4550 ---0 0000 ---0 0000 ---u uuuu

PCLATH 2455 2550 4455 4550 0000 0000 0000 0000 uuuu uuuu

PCL 2455 2550 4455 4550 0000 0000 0000 0000 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 2455 2550 4455 4550 xxxx xxxx uuuu uuuu uuuu uuuu

INTCON 2455 2550 4455 4550 0000 000x 0000 000u uuuu uuuu

(2)

INTCON2 2455 2550 4455 4550 1111 -1-1 1111 -1-1 uuuu -u-u

(2)

INTCON3 2455 2550 4455 4550 11-0 0-00 11-0 0-00 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: 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.

Note 1: 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.

2: One or more bits in the INTCONx or PIRx registers will be affected (to cause wake-up).

3: 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).

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

5: 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’.