Datasheet
PIC16(L)F720/721
DS40001430E-page 32 2010-2013 Microchip Technology Inc.
TABLE 3-6: INITIALIZATION CONDITION FOR REGISTERS
Register Address
Power-on Reset/
Brown-out Reset
(1)
MCLR Reset/
WDT Reset
Wake-up from Sleep through
Interrupt/Time-out
W—xxxx xxxx uuuu uuuu uuuu uuuu
INDF 00h/80h/
100h/180h
xxxx xxxx xxxx xxxx uuuu uuuu
TMR0 01h/101h xxxx xxxx uuuu uuuu uuuu uuuu
PCL 02h/82h/
102h/182h
0000 0000 0000 0000 PC + 1
(3)
STATUS 03h/83h/
103h/183h
0001 1xxx 000q quuu
(4)
uuuq quuu
(4)
FSR 04h/84h/
104h/184h
xxxx xxxx uuuu uuuu uuuu uuuu
PORTA 05h --xx xxxx --xx xxxx --uu uuuu
PORTB 06h xxxx ---- xxxx ---- uuuu ----
PORTC 07h xxxx xxxx xxxx xxxx uuuu uuuu
PCLATH 0Ah/8Ah/
10Ah/18Ah
---0 0000 ---0 0000 ---u uuuu
INTCON 0Bh/8Bh/
10Bh/18Bh
0000 000x 0000 000x uuuu uuuu
(2)
PIR1 0Ch 0000 0000 0000 0000 uuuu uuuu
(2)
TMR1L 0Eh xxxx xxxx uuuu uuuu uuuu uuuu
TMR1H 0Fh xxxx xxxx uuuu uuuu uuuu uuuu
T1CON 10h 0000 -0-0 0000 -0-0 uuuu -u-u
TMR2 11h 0000 0000 0000 0000 uuuu uuuu
T2CON 12h -000 0000 -000 0000 -uuu uuuu
SSPBUF 13h xxxx xxxx xxxx xxxx uuuu uuuu
SSPCON 14h 0000 0000 0000 0000 uuuu uuuu
CCPR1L 15h xxxx xxxx xxxx xxxx uuuu uuuu
CCPR1H 16h xxxx xxxx xxxx xxxx uuuu uuuu
CCP1CON 17h --00 0000 --00 0000 --uu uuuu
RCSTA 18h 0000 000x 0000 000x uuuu uuuu
TXREG 19h 0000 0000 0000 0000 uuuu uuuu
RCREG 1Ah 0000 0000 0000 0000 uuuu uuuu
ADRES 1Eh xxxx xxxx uuuu uuuu uuuu uuuu
ADCON0 1Fh --00 0000 --00 0000 --uu uuuu
OPTION_REG 81h/181h 1111 1111 1111 1111 uuuu uuuu
TRISA 85h --11 -111 --11 -111 --uu -uuu
TRISB 86h 1111 ---- 1111 ---- uuuu ----
TRISC 87h 1111 1111 1111 1111 uuuu uuuu
PIE1 8Ch 0000 0000 0000 0000 uuuu uuuu
Legend: u = unchanged, x = unknown,
- = unimplemented bit, reads as ‘0’, q = value depends on condition.
Note 1: If V
DD 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 3-8 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.