PIC16F506 Microchip Technology, PIC16F506 Datasheet - Page 63

• Manufacturer Part Number: PIC16F506
• Description: (PIC12F510 / PIC16F506) 8-Bit Flash Microcontroller
• Manufacturer: Microchip Technology

10.3
The device differentiates between various kinds of
Reset:
• Power-on Reset (POR)
• MCLR Reset during normal operation
• MCLR Reset during Sleep
• WDT Time-out Reset during normal operation
• WDT Time-out Reset during Sleep
• Wake-up from Sleep Reset on pin change
• Wake-up from Sleep Reset on comparator
Some registers are not reset in any way, they are
unknown on POR and unchanged in any other Reset.
Most other registers are reset to “Reset state” on
Power-on Reset (POR), MCLR, WDT or Wake-up from
Sleep Reset on pin change or wake-up from Sleep
Reset on comparator change. The exceptions are TO,
PD, CWUF and RBWUF/GPWUF bits. They are set or
cleared differently in different Reset situations. These
bits are used in software to determine the nature of
Reset. See Table 10-4 for a full description of Reset
states of all registers.
TABLE 10-3:
© 2006 Microchip Technology Inc.
W
INDF
TMR0
PCL
STATUS
FSR
OSCCAL
GPIO
CM1CON0
ADCON0
ADRES
OPTION
TRISIO
Legend: u = unchanged, x = unknown, – = unimplemented bit, read as ‘0’, q = value depends on condition.
Note 1:
change
Register
2:
Reset
Bits <7:2> of W register contain oscillator calibration values due to MOVLW XX instruction at top of
memory.
See Table 10-5 for Reset value for specific conditions.
RESET CONDITIONS FOR REGISTERS – PIC12F510
Address
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
—
—
—
Power-on Reset
qqqq qqqu
Preliminary
0001 1xxx
1111 1100
1111 1111
110x xxxx
1111 1111
1111 1111
xxxx xxxx
xxxx xxxx
xxxx xxxx
1111 111-
--xx xxxx
--11 1111
(1)
PIC12F510/16F506
Wake-up On Pin Change, Wake-up on
MCLR Reset, WDT Time-out,
Comparator Change
qqqq qqqu
qq0q quuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
11uu uuuu
uu11 1100
uuuu uuu-
1111 1111
--uu uuuu
1111 1111
--11 1111
(1)
(2)
DS41268B-page 61