12F508 Microchip Technology, 12F508 Datasheet - Page 23
12F508
Manufacturer Part Number
12F508
Description
Search -----> PIC12F508
Manufacturer
Microchip Technology
Datasheet
1.12F508.pdf
(98 pages)
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REGISTER 4-2:
© 2005 Microchip Technology Inc.
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
STATUS REGISTER (ADDRESS: 03h) (PIC16F505)
RBWUF: PORTB Reset bit
1 = Reset due to wake-up from Sleep on pin change
0 = After power-up or other Reset
Reserved: Do not use
PA0: Program Page Preselect bits
1 = Page 1 (200h-3FFh)
0 = Page 0 (000h-1FFh)
Each page is 512 bytes.
Using the PA0 bit as a general purpose read/write bit in devices which do not use it for program
page preselect is not recommended, since this may affect upward compatibility with future
products.
TO: Time-out bit
1 = After power-up, CLRWDT instruction, or SLEEP instruction
0 = A WDT time-out occurred
PD: Power-down bit
1 = After power-up or by the CLRWDT instruction
0 = By execution of the SLEEP instruction
Z: Zero bit
1 = The result of an arithmetic or logic operation is zero
0 = The result of an arithmetic or logic operation is not zero
DC: Digit carry/borrow bit (for ADDWF and SUBWF instructions)
ADDWF:
1 = A carry from the 4th low-order bit of the result occurred
0 = A carry from the 4th low-order bit of the result did not occur
SUBWF:
1 = A borrow from the 4th low-order bit of the result did not occur
0 = A borrow from the 4th low-order bit of the result occurred
C: Carry/borrow bit (for ADDWF, SUBWF and RRF, RLF instructions)
ADDWF:
1 = A carry occurred
0 = A carry did not occur 0 = A borrow occurred
bit 7
Legend:
R = Readable bit
-n = Value at POR
RBWUF
R/W-0
R/W-0
—
R/W-0
SUBWF:
1 = A borrow did not occur Load bit with LSb or MSb, respectively
PA0
Preliminary
W = Writable bit
‘1’ = Bit is set
PIC12F508/509/16F505
R-1
TO
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R-1
PD
RRF or RLF:
R/W-x
Z
x = Bit is unknown
R/W-x
DC
DS41236B-page 21
R/W-x
C
bit 0
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