PIC16LC554 datasheet(42/96 Pages) MICROCHIP

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PIC16C55X(A)

DS40143B-page 42

Preliminary

TABLE 7-5:

INITIALIZATION CONDITION FOR SPECIAL REGISTERS

TABLE 7-6:

INITIALIZATION CONDITION FOR REGISTERS

Condition

Program

Counter

STATUS

PCON

Power-on Reset

000h

0001 1xxx

---- --0-

MCLR reset during normal operation

000h

0001 1uuu

---- --u-

MCLR reset during SLEEP

000h

0001 0uuu

---- --u-

WDT reset

000h

0000 1uuu

---- --u-

WDT Wake-up

PC + 1

uuu0 0uuu

---- --u-

Interrupt Wake-up from SLEEP

PC + 1(1)

uuu1 0uuu

---- --u-

Legend: u = unchanged, x = unknown, - = unimplemented bit, reads as ‘0’.

Note 1:

When the wake-up is due to an interrupt and global enable bit, GIE is set, the PC is loaded with the interrupt vector

(0004h) after execution of PC+1.

Address

Power-on Reset

• MCLR Reset during

normal operation

• MCLR Reset during

SLEEP

• WDT Reset

• Wake up from SLEEP

through interrupt

• Wake up from SLEEP

through WDT time-out

xxxx xxxx

uuuu uuuu

INDF

00h

TMR0

01h

xxxx xxxx

uuuu uuuu

PCL

02h

0000 0000

PC + 1

(2)

STATUS

03h

0001 1xxx

000q quuu

(3)

uuuq quuu

(3)

FSR

04h

xxxx xxxx

uuuu uuuu

PORTA

05h

---x xxxx

---u uuuu

PORTB

06h

xxxx xxxx

uuuu uuuu

PCLATH

0Ah

---0 0000

---u uuuu

INTCON

0Bh

0000 000x

uuuu uuuu

(1)

OPTION

81h

1111 1111

uuuu uuuu

TRISA

85h

---1 1111

---u uuuu

TRISB

86h

1111 1111

uuuu uuuu

PCON

8Eh

---- --0-

---- --u-

Legend: u = unchanged, x = unknown, - = unimplemented bit, reads as ‘0’,q = value depends on condition.

Note 1: One or more bits in INTCON will be affected (to cause wake-up).

2: When the wake-up is due to an interrupt and the GIE bit is set, the PC is loaded with the interrupt

vector (0004h).

3: See Table 7-5 for reset value for speciﬁc condition.

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