PIC16F688
TABLE 11-4: INITIALIZATION CONDITION FOR REGISTERS (CONTINUED)
• MCLR Reset
• Wake-up from Sleep
through interrupt
Power-on
Reset
• WDT Reset
• Brown-out Detect(1)
Register
Address
• Wake-up from Sleep
through WDT time-out
OSCCON
OSCTUNE
ANSEL
8Fh
90h
91h
95h
96h
97h
98h
99h
9Ah
9Bh
9Ch
9Dh
9Eh
9Fh
-110 x000
---0 0000
1111 1111
--11 -111
--00 0000
--00 0000
---- 0000
0-0- 0000
0000 0000
0000 0000
x--- x000
---- ----
xxxx xxxx
-000 ----
-110 x000
---u uuuu
1111 1111
--11 -111
--00 0000
0000 0000
0000 0000
0-0- 0000
0000 0000
0000 0000
u--- q000
---- ----
uuuu uuuu
-000 ----
-uuu uuuu
---u uuuu
uuuu uuuu
uuuu uuuu
--uu uuuu
uuuu uuuu
uuuu uuuu
u-u- uuuu
uuuu uuuu
uuuu uuuu
u--- uuuu
---- ----
uuuu uuuu
-uuu ----
WPUA
IOCA
EEDATH
EEADRH
VRCON
EEDAT
EEADR
EECON1
EECON2
ADRESL
ADCON1
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 and/or PIR1 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 11-5 for Reset value for specific condition.
5: If Reset was due to brown-out, then bit 0 = 0. All other Resets will cause bit 0 = u.
TABLE 11-5: INITIALIZATION CONDITION FOR SPECIAL REGISTERS
Program
Counter
Status
Register
PCON
Register
Condition
Power-on Reset
000h
000h
0001 1xxx
000u uuuu
--01 --0x
--0u --uu
MCLR Reset during normal operation
MCLR Reset during Sleep
WDT Reset
000h
000h
0001 0uuu
0000 uuuu
uuu0 0uuu
0001 1uuu
uuu1 0uuu
--0u --uu
--0u --uu
--uu --uu
--01 --10
--uu --uu
WDT Wake-up
PC + 1
Brown-out Detect
000h
PC + 1(1)
Interrupt Wake-up from Sleep
Legend: u= unchanged, x= unknown, — = unimplemented bit, reads as ‘0’.
Note 1: When the wake-up is due to an interrupt and Global Interrupt Enable bit, GIE, is set, the PC is loaded with
the interrupt vector (0004h) after execution of PC + 1.
DS41203B-page 108
Preliminary
2004 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
