16F630 datasheet(63/132 Pages) MICROCHIP

63 / 132 page

 2003 Microchip Technology Inc.

DS40039C-page 61

PIC16F630/676

TABLE 9-7:

INITIALIZATION CONDITION FOR REGISTERS

Address

Power-on

Reset

•MCLR Reset

• 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/80h

—

TMR0

01h

xxxx xxxx

uuuu uuuu

PCL

02h/82h

0000 0000

PC + 1(3)

STATUS

03h/83h

0001 1xxx

000q quuu(4)

uuuq quuu(4)

FSR

04h/84h

xxxx xxxx

uuuu uuuu

PORTA

05h

--xx xxxx

--uu uuuu

PORTC

07h

--xx xxxx

--uu uuuu

PCLATH

0Ah/8Ah

---0 0000

---u uuuu

INTCON

0Bh/8Bh

0000 0000

0000 000u

uuuu uuqq(2)

PIR1

0Ch

00-- 0--0

qq-- q--q(2,5)

T1CON

10h

-000 0000

-uuu uuuu

CMCON

19h

-0-0 0000

-u-u uuuu

ADRESH

1Eh

xxxx xxxx

uuuu uuuu

ADCON0

1Fh

00-0 0000

uu-u uuuu

OPTION_REG

81h

1111 1111

uuuu uuuu

TRISA

85h

--11 1111

--uu uuuu

TRISC

87h

--11 1111

--uu uuuu

PIE1

8Ch

00-- 0--0

uu-- u--u

PCON

8Eh

---- --0x

---- --uu(1,6)

---- --uu

OSCCAL

90h

1000 00--

uuuu uu--

ANSEL

91h

1111 1111

uuuu uuuu

WPUA

95h

--11 -111

uuuu uuuu

IOCA

96h

--00 0000

--uu uuuu

VRCON

99h

0-0- 0000

u-u- uuuu

EEDATA

9Ah

0000 0000

uuuu uuuu

EEADR

9Bh

-000 0000

-uuu uuuu

EECON1

9Ch

---- x000

---- q000

---- uuuu

EECON2

9Dh

---- ----

ADRESL

9Eh

xxxx xxxx

uuuu uuuu

ADCON1

9Fh

-000 ----

-uuu ----

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

Note 1: If V

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

2: One or more bits in INTCON and/or PIR1 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 9-6 for RESET value for specific condition.

5: If wake-up was due to data EEPROM write completing, bit 7 = 1; A/D conversion completing, bit 6 = 1;

Comparator input changing, bit 3 = 1; or Timer1 rolling over, bit 0 = 1. All other interrupts generating a

wake-up will cause these bits to = 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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