PIC10F200 Microchip Technology, Inc., PIC10F200 Datasheet - Page 21

• Manufacturer Part Number: PIC10F200
• Description: 6-Pin, 8-Bit Flash Microcontrollersfeatures 6-pin SOT-23 Packaging Precision 4 MHZ Internal Oscillator Baseline Core With 33 Instructions, 2 Stack Levels All Single-cycle Instructions Except For Program Branches Which Are Two Cycles 12-bit Wide
• Manufacturer: Microchip Technology, Inc.

4.4
This register contains the arithmetic status of the ALU,
the Reset status and the page preselect bit.
The Status register can be the destination for any
instruction, as with any other register. If the Status
register is the destination for an instruction that affects
the Z, DC or C bits, then the write to these three bits is
disabled. These bits are set or cleared according to the
device logic. Furthermore, the TO and PD bits are not
writable. Therefore, the result of an instruction with the
Status register as destination may be different than
intended.
REGISTER 4-1:
 2004 Microchip Technology Inc.
Status Register
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
STATUS REGISTER (ADDRESS: 03h)
GPWUF: GPIO Reset bit
1 = Reset due to wake-up from Sleep on pin change
0 = After power-up or other Reset
CWUF: Comparator Wake-up on Change Flag Bit
1 = Reset due to wake-up from Sleep on comparator change
0 = After power-up or other Reset conditions.
Reserved: Do not use. Use of this bit 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
Legend:
R = Readable bit
-n = Value at POR
bit 7
GPWUF
R/W-0
Note 1: This bit is used on the PIC10F204/206. For code compatibility do not use this bit on
the PIC10F200/202.
CWUF
R/W-0
(1)
R/W-0
Preliminary
—
SUBWF:
1 = A borrow did not occur Load bit with LSb or MSb, respectively
0 = A borrow occurred
W = Writable bit
‘1’ = Bit is set
PIC10F200/202/204/206
R-1
TO
For example, CLRF STATUS, will clear the upper three
bits and set the Z bit. This leaves the Status register as
000u u1uu (where u = unchanged).
Therefore, it is recommended that only BCF, BSF and
MOVWF instructions be used to alter the Status register.
These instructions do not affect the Z, DC or C bits from
the Status register. For other instructions which do
affect Status bits, see Section 10.0 “Instruction Set
Summary”.
(1)
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
DS41239A-page 19
R/W-x
C
bit 0