PIC16F87_05 Datasheet, PDF (138/228 Pages) Microchip Technology – 18/20/28-Pin Enhanced Flash Microcontrollers with nanoWatt Technology

PIC16F87/88
TABLE 15-4: INITIALIZATION CONDITIONS FOR ALL REGISTERS (CONTINUED)
Register
Power-on Reset,
Brown-out Reset
MCLR Reset,
WDT Reset
Wake-up via WDT or
Interrupt
TXREG
0000 0000
0000 0000
uuuu uuuu
RCREG
0000 0000
0000 0000
uuuu uuuu
ADRESH
xxxx xxxx
uuuu uuuu
uuuu uuuu
ADCON0
0000 00-0
0000 00-0
uuuu uu-u
OPTION_REG
TRISA
TRISB
1111 1111
1111 1111
1111 1111
1111 1111
1111 1111
1111 1111
uuuu uuuu
uuuu uuuu
uuuu uuuu
PIE1
PIE2
-000 0000
00-0 ----
-000 0000
00-0 ----
-uuu uuuu
uu-u ----
PCON
---- --0q
---- --uu
---- --uu
OSCCON
-000 0000
-000 0000
-uuu uuuu
OSCTUNE
--00 0000
--00 0000
--uu uuuu
PR2
1111 1111
1111 1111
1111 1111
SSPADD
SSPSTAT
TXSTA
0000 0000
0000 0000
0000 -010
0000 0000
0000 0000
0000 -010
uuuu uuuu
uuuu uuuu
uuuu -u1u
SPBRG
ANSEL
0000 0000
-111 1111
0000 0000
-111 1111
uuuu uuuu
-111 1111
CMCON
0000 0111
0000 0111
uuuu u111
CVRCON
000- 0000
000- 0000
uuu- uuuu
WDTCON
---0 1000
---0 1000
---u uuuu
ADRESL
xxxx xxxx
uuuu uuuu
uuuu uuuu
ADCON1
EEDATA
EEADR
0000 ----
xxxx xxxx
xxxx xxxx
0000 ----
uuuu uuuu
uuuu uuuu
uuuu ----
uuuu uuuu
uuuu uuuu
EEDATH
EEADRH
--xx xxxx
---- -xxx
--uu uuuu
---- -uuu
--uu uuuu
---- -uuu
EECON1
x--x x000
u--x u000
u--u uuuu
EECON2
---- ----
---- ----
---- ----
Legend:
Note 1:
2:
3:
u = unchanged, x = unknown, - = unimplemented bit, read as ‘0’, q = value depends on condition
One or more bits in INTCON, PIR1 and PR2 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 15-3 for Reset value for specific condition.
DS30487C-page 136
 2005 Microchip Technology Inc.