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PIC16F684T-E Datasheet, PDF (107/192 Pages) Microchip Technology – 14-Pin, Flash-Based 8-Bit CMOS Microcontrollers with nanoWatt Technology
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PIC16F684
TABLE 12-4: INITIALIZATION CONDITION FOR REGISTERS (CONTINUED)
Register
Address
Power-on
Reset
MCLR Reset
WDT Reset (Continued)
Brown-out Reset(1)
Wake-up from Sleep through
Interrupt
Wake-up from Sleep through
WDT Time-out (Continued)
OSCTUNE
90h
---0 0000
---u uuuu
---u uuuu
ANSEL
91h
1111 1111
1111 1111
uuuu uuuu
PR2
92h
1111 1111
1111 1111
1111 1111
WPUA
95h
--11 -111
--11 -111
uuuu uuuu
IOCA
96h
--00 0000
--00 0000
--uu 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 ----
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 12-5 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.
6: Port pins with analog functions controlled by the ANSEL register will read ‘0’ immediately after a Reset
even though the data latches are either undefined (POR) or unchanged (other Resets).
TABLE 12-5: INITIALIZATION CONDITION FOR SPECIAL REGISTERS
Condition
Program
Counter
Status
Register
PCON
Register
Power-on Reset
000h
0001 1xxx
--01 --0x
MCLR Reset during normal operation
000h
000u uuuu
--0u --uu
MCLR Reset during Sleep
000h
0001 0uuu
--0u --uu
WDT Reset
000h
0000 uuuu
--0u --uu
WDT Wake-up
PC + 1
uuu0 0uuu
--uu --uu
Brown-out Reset
Interrupt Wake-up from Sleep
000h
PC + 1(1)
0001 1uuu
uuu1 0uuu
--01 --u0
--uu --uu
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.
© 2007 Microchip Technology Inc.
DS41202F-page 105
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