PIC16F628-20SLASHSS datasheet(104/160 Pages) MICROCHIP

104 / 160 page

PIC16F62X

DS40300B-page 104

Preliminary

TABLE 14-7:

INITIALIZATION CONDITION FOR REGISTERS

Address

Power-on Reset

•MCLR Reset during

normal operation

•MCLR Reset during

SLEEP

• WDT Reset

• Brown-out Detect (1)

• Wake up from

SLEEP through

interrupt

• Wake up from

SLEEP through

WDT time-out

W-

xxxx xxxx

uuuu uuuu

INDF

00h

TMR0

01h

xxxx xxxx

uuuu uuuu

PCL

02h

0000 0000

PC + 1

(3)

STATUS

03h

0001 1xxx

000q quuu

(4)

uuuq quuu

(4)

FSR

04h

xxxx xxxx

uuuu uuuu

PORTA

05h

xxxx 0000

xxxx u000

xxxx 0000

PORTB

06h

xxxx xxxx

uuuu uuuu

T1CON

10h

--00 0000

--uu uuuu

T2CON

12h

-000 0000

CCP1CON

17h

--00 0000

RCSTA

18h

0000 -00x

CMCON

1Fh

0000 0000

uu-- uuuu

PCLATH

0Ah

---0 0000

---u uuuu

INTCON

0Bh

0000 000x

0000 000u

uuuu uqqq

(2)

PIR1

0Ch

0000 -000

-q-- ----

(2,5)

OPTION

81h

1111 1111

uuuu uuuu

TRISA

85h

11-1 1111

11-- 1111

uu-u uuuu

TRISB

86h

1111 1111

uuuu uuuu

PIE1

8Ch

0000 -000

uuuu -uuu

PCON

8Eh

---- 1-0x

---- 1-uq

(1,6)

---- --uu

TXSTA

98h

0000 -010

EECON1

9Ch

---- x000

---- q000

VRCON

9Fh

000- 0000

uuu- uuuu

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

Note 1:

If VDD goes too low, Power-on Reset will be activated and registers will be affected differently.

2: One or more bits in INTCON, PIR1 and/or PIR2 will be affected (to cause wake-up).

3: When the wake-up is due to an interrupt and the GIE bit is set, the PC is loaded with the interrupt vector (0004h).

4: See Table 14-6 for reset value for specific condition.

5: If wake-up was due to comparator input changing, then bit 6 = 1. All other interrupts generating a wake-up will cause

bit 6 = u.

6: If reset was due to brown-out, then bit 0 = 0. All other resets will cause bit 0 = u.

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