PIC16C62X
TABLE 9-6:
INITIALIZATION CONDITION FOR SPECIAL REGISTERS
Program
Counter
STATUS
Register
PCON
Register
Condition
Power-on Reset
000h
000h
000h
000h
PC + 1
000h
0001 1xxx
000u uuuu
0001 0uuu
0000 uuuu
uuu0 0uuu
000x xuuu
uuu1 0uuu
---- --0x
---- --uu
---- --uu
---- --uu
---- --uu
---- --u0
---- --uu
MCLR reset during normal operation
MCLR reset during SLEEP
WDT reset
WDT Wake-up
Brown-out Reset
(1)
Interrupt Wake-up from SLEEP
PC + 1
Legend: u= unchanged, x= unknown, -= unimplemented bit, reads as ‘0’.
Note 1: When the wake-up is due to an interrupt and global enable bit, GIE is set, the PC is loaded with the interrupt vector
(0004h) after execution of PC+1.
TABLE 9-7:
INITIALIZATION CONDITION FOR REGISTERS
• MCLR Reset during
normal operation
• MCLR Reset during
SLEEP
• Wake up from SLEEP
through interrupt
• Wake up from SLEEP
through WDT time-out
• WDT Reset
(1)
Register
Address
Power-on Reset
• Brown-out Reset
xxxx xxxx
-
uuuu uuuu
-
uuuu uuuu
-
W
-
INDF
TMR0
00h
01h
xxxx xxxx
uuuu uuuu
uuuu uuuu
(3)
0000 0000
0000 0000
PC + 1
PCL
02h
(4)
(4)
0001 1xxx
xxxx xxxx
---x xxxx
xxxx xxxx
00-- 0000
---0 0000
000q quuu
uuuq quuu
STATUS
FSR
03h
04h
05h
06h
1Fh
0Ah
uuuu uuuu
---u uuuu
uuuu uuuu
00-- 0000
---0 0000
uuuu uuuu
---u uuuu
uuuu uuuu
uu-- uuuu
---u uuuu
PORTA
PORTB
CMCON
PCLATH
(2)
0000 000x
0000 000u
uuuu uqqq
INTCON
0Bh
(2,5)
-0-- ----
1111 1111
---1 1111
1111 1111
-0-- ----
-0-- ----
1111 1111
---1 1111
1111 1111
-0-- ----
-q-- ----
PIR1
0Ch
81h
85h
86h
8Ch
uuuu uuuu
---u uuuu
uuuu uuuu
-u-- ----
OPTION
TRISA
TRISB
PIE1
(1,6)
---- --0x
000- 0000
---- --uq
000- 0000
---- --uu
uuu- uuuu
PCON
8Eh
9Fh
VRCON
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, PIR1 and/or PIR2 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 comparator input changing, then bit 6 = 1. All other interrupts generating a wake-up will cause bit 6 = u.
6: If reset was due to brown-out, then bit 0 = 0. All other resets will cause bit 0 = u.
DS30235G-page 52
Preliminary
1998 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
