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| PIC16F631_08 Datasheet, PDF (207/306 Pages) Microchip Technology – 20-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology | |||
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PIC16F631/677/685/687/689/690
TABLE 14-4: INITIALIZATION CONDITION FOR REGISTER
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
â
xxxx xxxx
uuuu uuuu
uuuu uuuu
INDF
00h/80h/
100h/180h
xxxx xxxx
xxxx xxxx
uuuu uuuu
TMR0
PCL
STATUS
01h/101h
02h/82h/
102h/182h
03h/83h/
103h/183h
xxxx xxxx
0000 0000
0001 1xxx
uuuu uuuu
0000 0000
000q quuu(4)
uuuu uuuu
PC + 1(3)
uuuq quuu(4)
FSR
04h/84h/
104h184h
xxxx xxxx
uuuu uuuu
uuuu uuuu
PORTA
05h/105h
--xx xxxx
--uu uuuu
--uu uuuu
PORTB
06h/106h
xxxx ----
uuuu ----
uuuu ----
PORTC
07h/107h
xxxx xxxx
uuuu uuuu
uuuu uuuu
PCLATH
INTCON
PIR1
PIR2
0Ah/8Ah/
10Ah/18Ah
0Bh/8Bh/
10Bh/18Bh
0Ch
0Dh
---0 0000
0000 000x
-000 0000
0000 ----
---0 0000
0000 000u
-000 0000
0000 ----
---u uuuu
uuuu uuuu(2)
-uuu uuuu(2)
uuuu ----(2)
TMR1L
0Eh
xxxx xxxx
uuuu uuuu
uuuu uuuu
TMR1H
0Fh
xxxx xxxx
uuuu uuuu
uuuu uuuu
T1CON
10h
0000 0000
uuuu uuuu
uuuu uuuu
TMR2
11h
0000 0000
0000 0000
uuuu uuuu
T2CON
12h
-000 0000
-000 0000
-uuu uuuu
SSPBUF
13h
xxxx xxxx
uuuu uuuu
uuuu uuuu
SSPCON
14h
0000 0000
0000 0000
uuuu uuuu
CCPR1L
15h
xxxx xxxx
uuuu uuuu
uuuu uuuu
CCPR1H
16h
xxxx xxxx
uuuu uuuu
uuuu uuuu
CCP1CON
17h
0000 0000
0000 0000
uuuu uuuu
RCSTA
18h
0000 000x
0000 000x
uuuu uuuu
TXREG
19h
0000 0000
0000 0000
uuuu uuuu
RCREG
1Ah
0000 0000
0000 0000
uuuu uuuu
PWM1CON
1Ch
0000 0000
0000 0000
uuuu uuuu
ECCPAS
1Dh
0000 0000
0000 0000
uuuu uuuu
ADRESH
1Eh
xxxx xxxx
uuuu uuuu
uuuu uuuu
ADCON0
1Fh
0000 0000
0000 0000
uuuu uuuu
OPTION_REG 81h/181h
1111 1111
1111 1111
uuuu uuuu
TRISA
85h/185h
--11 1111
--11 1111
--uu uuuu
Legend:
Note 1:
2:
3:
4:
5:
6:
u = unchanged, x = unknown, â = unimplemented bit, reads as â0â, q = value depends on condition.
If VDD goes too low, Power-on Reset will be activated and registers will be affected differently.
One or more bits in INTCON and/or PIR1 will be affected (to cause wake-up).
When the wake-up is due to an interrupt and the GIE bit is set, the PC is loaded with the interrupt vector (0004h).
See Table 14-5 for Reset value for specific condition.
If Reset was due to brown-out, then bit 0 = 0. All other Resets will cause bit 0 = u.
Accessible only when SSPM<3:0> = 1001.
© 2008 Microchip Technology Inc.
DS41262E-page 205
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