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PIC16F676-I Datasheet, PDF (63/132 Pages) Microchip Technology – 14-Pin, Flash-Based 8-Bit CMOS Microcontrollers
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PIC16F630/676
TABLE 9-7: INITIALIZATION CONDITION FOR REGISTERS
Register
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
INDF
—
00h/80h
xxxx xxxx
—
uuuu uuuu
—
uuuu uuuu
—
TMR0
PCL
STATUS
01h
02h/82h
03h/83h
xxxx xxxx
0000 0000
0001 1xxx
uuuu uuuu
0000 0000
000q quuu(4)
uuuu uuuu
PC + 1(3)
uuuq quuu(4)
FSR
04h/84h xxxx xxxx
uuuu uuuu
uuuu uuuu
PORTA
05h
--xx xxxx
--uu uuuu
--uu uuuu
PORTC
07h
--xx xxxx
--uu uuuu
--uu uuuu
PCLATH
INTCON
PIR1
0Ah/8Ah
0Bh/8Bh
0Ch
---0 0000
0000 0000
00-- 0--0
---0 0000
0000 000u
00-- 0--0
---u uuuu
uuuu uuqq(2)
qq-- q--q(2,5)
T1CON
10h
-000 0000
-uuu uuuu
-uuu uuuu
CMCON
19h
-0-0 0000
-0-0 0000
-u-u uuuu
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
PCON
8Ch
00-- 0--0
8Eh
---- --0x
00-- 0--0
---- --uu(1,6)
uu-- u--u
---- --uu
OSCCAL
90h
1000 00--
1000 00--
uuuu uu--
ANSEL
91h
1111 1111
1111 1111
uuuu uuuu
WPUA
95h
--11 -111
--11 -111
uuuu uuuu
IOCA
96h
--00 0000
--00 0000
--uu uuuu
VRCON
99h
0-0- 0000
0-0- 0000
u-u- uuuu
EEDATA
9Ah
0000 0000
0000 0000
uuuu uuuu
EEADR
9Bh
-000 0000
-000 0000
-uuu uuuu
EECON1
9Ch
---- x000
---- q000
---- uuuu
EECON2
9Dh
---- ----
---- ----
---- ----
ADRESL
9Eh
xxxx xxxx
uuuu uuuu
uuuu uuuu
ADCON1
9Fh
-000 ----
-000 ----
-uuu ----
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 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.
 2010 Microchip Technology Inc.
DS40039F-page 63
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