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PIC16F636T-I Datasheet, PDF (139/234 Pages) Microchip Technology – 8/14-Pin, Flash-Based 8-Bit CMOS Microcontrollers with nanoWatt Technology
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PIC12F635/PIC16F636/639
TABLE 12-4: INITIALIZATION CONDITION FOR REGISTERS
Register
Address
Power-on
Reset
Wake-up Reset
MCLR Reset
WDT Reset
Brown-out Reset(1)
Wake-up Reset
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
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
PORTC(6)
05h
--xx xx00
07h
--xx xx00
--00 0000
--00 0000
--uu uu00
--uu uu00
PCLATH
INTCON
PIR1
0Ah/8Ah
0Bh/8Bh
0Ch
---0 0000
0000 000x
0000 00-0
---0 0000
0000 000x
0000 00-0
---u uuuu
uuuu uuuu(2)
uuuu uu-u(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
WDTCON
18h
---0 1000
---0 1000
---u uuuu
CMCON0
19h
0000 0000
0000 0000
uuuu uuuu
CMCON1
1Ah
---- --10
---- --10
---- --uu
OPTION_REG
81h
1111 1111
1111 1111
uuuu uuuu
TRISA
TRISC(6)
85h
--11 1111
87h
--11 1111
--11 1111
--11 1111
--uu 1uuu
--uu 1uuu
PIE1
PCON
8Ch
0000 00-0
8Eh
--01 q-qq
0000 00-0
--0u u-uu(1,5)
uuuu uu-u
--0u u-uu
OSCCON
8Fh
-110 q000
-110 q000
-uuu uuuu
OSCTUNE
90h
---0 0000
---u uuuu
---u uuuu
WPUDA
95h
--11 -111
--11 -111
uuuu uuuu
IOCA
96h
--00 0000
--00 0000
--uu uuuu
WDA
97h
--11 -111
--11 -111
uuuu uuuu
VRCON
99h
0-0- 0000
0-0- 0000
u-u- uuuu
EEDAT
9Ah
0000 0000
0000 0000
uuuu uuuu
EEADR
9Bh
0000 0000
0000 0000
uuuu uuuu
EECON1
9Ch
---- x000
---- q000
---- uuuu
EECON2
9Dh
---- ----
---- ----
---- ----
ADRESL
9Eh
xxxx xxxx
uuuu uuuu
uuuu uuuu
ADCON1
9Fh
-000 ----
-000 ----
-uuu ----
LVDCON
94h
--00 -000
--00 -000
--uu -uuu
CRCON
110h
00-- --00
00-- --00
uu-- --uu
Legend:
Note 1:
2:
3:
4:
5:
6:
u = unchanged, x = unknown, - = unimplemented bit, reads as ‘0’, 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 12-5 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.
PIC16F636/639 only.
© 2007 Microchip Technology Inc.
DS41232D-page 137
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