PIC16F877-20L Datasheet, PDF (127/218 Pages) Microchip Technology – 28/40-Pin 8-Bit CMOS FLASH Microcontrollers

PIC16F87X
TABLE 12-6: INITIALIZATION CONDITIONS FOR ALL REGISTERS (CONTINUED)
Register
Devices
Power-on Reset,
Brown-out Reset
MCLR Resets,
WDT Reset
Wake-up via WDT or
Interrupt
PIE2
873 874 876 877
-r-0 0--0
-r-0 0--0
-r-u u--u
PCON
873 874 876 877
---- --qq
---- --uu
---- --uu
PR2
873 874 876 877
1111 1111
1111 1111
1111 1111
SSPADD
873 874 876 877
0000 0000
0000 0000
uuuu uuuu
SSPSTAT
873 874 876 877
--00 0000
--00 0000
--uu uuuu
TXSTA
873 874 876 877
0000 -010
0000 -010
uuuu -uuu
SPBRG
873 874 876 877
0000 0000
0000 0000
uuuu uuuu
ADRESL
873 874 876 877
xxxx xxxx
uuuu uuuu
uuuu uuuu
ADCON1
873 874 876 877
0--- 0000
0--- 0000
u--- uuuu
EEDATA
873 874 876 877
0--- 0000
0--- 0000
u--- uuuu
EEADR
873 874 876 877
xxxx xxxx
uuuu uuuu
uuuu uuuu
EEDATH
873 874 876 877
xxxx xxxx
uuuu uuuu
uuuu uuuu
EEADRH
873 874 876 877
xxxx xxxx
uuuu uuuu
uuuu uuuu
EECON1
873 874 876 877
x--- x000
u--- u000
u--- uuuu
EECON2
873 874 876 877
---- ----
---- ----
---- ----
Legend: u = unchanged, x = unknown, - = unimplemented bit, read as '0', q = value depends on condition,
r = reserved, maintain clear
Note 1: One or more bits in INTCON, PIR1 and/or PIR2 will be affected (to cause wake-up).
2: When the wake-up is due to an interrupt and the GIE bit is set, the PC is loaded with the interrupt vector
(0004h).
3: See Table 12-5 for RESET value for specific condition.
FIGURE 12-5:
TIME-OUT SEQUENCE ON POWER-UP (MCLR TIED TO VDD)
VDD
MCLR
INTERNAL POR
PWRT TIME-OUT
OST TIME-OUT
INTERNAL RESET
TPWRT
TOST
 1998-2013 Microchip Technology Inc.
DS30292D-page 127