Datasheet

PIC16F684
DS41202F-page 104 © 2007 Microchip Technology Inc.
TABLE 12-4: INITIALIZATION CONDITION FOR REGISTERS
Register Address
Power-on
Reset
MCLR
Reset
WDT Reset
Brown-out Reset
(1)
Wake-up from Sleep through
Interrupt
Wake-up from Sleep through
WDT Time-out
W—xxxx xxxx uuuu uuuu uuuu uuuu
INDF 00h/80h xxxx xxxx xxxx xxxx uuuu uuuu
TMR0 01h xxxx xxxx uuuu uuuu uuuu uuuu
PCL 02h/82h 0000 0000 0000 0000 PC + 1
(3)
STATUS 03h/83h 0001 1xxx 000q quuu
(4)
uuuq quuu
(4)
FSR 04h/84h xxxx xxxx uuuu uuuu uuuu uuuu
PORTA
(6)
05h --x0 x000 --u0 u000 --uu uuuu
PORTC
(6)
07h --xx 0000 --uu 0000 --uu uuuu
PCLATH 0Ah/8Ah ---0 0000 ---0 0000 ---u uuuu
INTCON 0Bh/8Bh 0000 0000 0000 0000 uuuu uuuu
(2)
PIR1 0Ch 0000 0000 0000 0000 uuuu uuuu
(2)
TMR1L 0Eh xxxx xxxx uuuu uuuu uuuu uuuu
TMR1H 0Fh xxxx xxxx uuuu uuuu uuuu uuuu
T1CON 10h 0000 0000 uuuu uuuu -uuu uuuu
TMR2 11h 0000 0000 0000 0000 uuuu uuuu
T2CON 12h -000 0000 -000 0000 -uuu uuuu
CCPR1L 13h xxxx xxxx uuuu uuuu uuuu uuuu
CCPR1H 14h xxxx xxxx uuuu uuuu uuuu uuuu
CCP1CON 15h 0000 0000 0000 0000 uuuu uuuu
PWM1CON 16h 0000 0000 0000 0000 uuuu uuuu
ECCPAS 17h 0000 0000 0000 0000 uuuu uuuu
WDTCON 18h ---0 1000 ---0 1000 ---u uuuu
CMCON0 19h 0000 0000 0000 0000 uuuu uuuu
CMCON1 1Ah ---- --10 ---- --10 ---- --uu
ADRESH 1Eh xxxx xxxx uuuu uuuu uuuu uuuu
ADCON0 1Fh 00-0 0000 00-0 0000 uu-u uuuu
OPTION_REG 81h 1111 1111 1111 1111 uuuu uuuu
TRISA 85h --11 1111 --11 1111 --uu uuuu
TRISC 87h --11 1111 --11 1111 --uu uuuu
PIE1 8Ch 0000 0000 0000 0000 uuuu uuuu
PCON 8Eh --01 --0x --0u --uq
(1, 5)
--uu --uu
OSCCON 8Fh -110 x000 -110 q000 -uuu uuuu
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 12-5 for Reset value for specific condition.
5: If Reset was due to brown-out, then bit 0 = 0. All other Resets will cause bit 0 = u.
6: Port pins with analog functions controlled by the ANSEL register will read ‘0’ immediately after a Reset
even though the data latches are either undefined (POR) or unchanged (other Resets).