PIC16C72A Microchip Technology, PIC16C72A Datasheet - Page 6

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PIC16C72A

Manufacturer Part Number
PIC16C72A
Description
28-Pin 8-Bit CMOS Microcontrollers
Manufacturer
Microchip Technology
Datasheet

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REGISTER 3:
DS39566A-page 6
bit 7
bit 6-5
bit 4
bit 3
bit 2
bit 1
bit 0
STATUS REGISTER (ADDRESS: 03h, 83h, 103h, 183h)
IRP: Register Bank Select bit (used for indirect addressing)
1 = Bank 2, 3 (100h - 1FFh)
0 = Bank 0, 1 (00h - FFh)
RP1:RP0: Register Bank Select bits (used for direct addressing)
Each bank is 128 bytes
11 = Bank 3 (180h - 1FFh)
10 = Bank 2 (100h - 17Fh)
01 = Bank 1 (80h - FFh)
00 = Bank 0 (00h - 7Fh)
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
(ADDWF, ADDLW, SUBLW, SUBWF instructions)
1 = A carry-out from the 4th low order bit of the result occurred
0 = No carry-out from the 4th low order bit of the result
C: Carry/borrow bit
(ADDWF, ADDLW, SUBLW, SUBWF instructions)
1 = A carry-out from the Most Significant bit of the result occurred
0 = No carry-out from the Most Significant bit of the result occurred
bit 7
Legend:
R = Readable bit
- n = Value at POR
R/W-0
Note 1: For borrow, the polarity is reversed. A subtraction is executed by adding the two’s
IRP
2: For rotate (RRF, RLF) instructions, this bit is loaded with either the high or low
complement of the second operand.
order bit of the source register.
R/W-0
RP1
Advance Information
R/W-0
RP0
W = Writable bit
‘1’ = Bit is set
R-1
TO
(1)
(1,2)
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R-1
PD
R/W-x
 2002 Microchip Technology Inc.
Z
x = Bit is unknown
R/W-x
DC
R/W-x
C
bit 0

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