PIC16F1847 datasheet(22/408 Pages) MICROCHIP

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PIC16(L)F1847

DS41453B-page 22

Preliminary

 2011 Microchip Technology Inc.

STATUS: STATUS REGISTER

U-0

R-1/q

R/W-0/u

—

ZDC(1)

C(1)

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

u = Bit is unchanged

x = Bit is unknown

-n/n = Value at POR and BOR/Value at all other Resets

‘1’ = Bit is set

‘0’ = Bit is cleared

q = Value depends on condition

bit 7-5

Unimplemented:

Read as ‘0’

bit 4

TO:

Time-out bit

= After power-up, CLRWDT instruction or SLEEP instruction

= A WDT time-out occurred

bit 3

PD:

Power-down bit

= After power-up or by the CLRWDT instruction

= By execution of the SLEEP instruction

bit 2

Zero bit

= The result of an arithmetic or logic operation is zero

= The result of an arithmetic or logic operation is not zero

bit 1

DC:

Digit Carry/Digit Borrow bit(1)

= A carry-out from the 4th low-order bit of the result occurred

= No carry-out from the 4th low-order bit of the result

bit 0

Carry/Borrow bit(1)

= A carry-out from the Most Significant bit of the result occurred

= No carry-out from the Most Significant bit of the result occurred

Note 1:

For Borrow, the polarity is reversed. A subtraction is executed by adding the two’s complement of the

second operand. For rotate (RRF, RLF) instructions, this bit is loaded with either the high-order or low-order

bit of the source register.

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