PIC24FJ16GA MICROCHIP [Microchip Technology], PIC24FJ16GA Datasheet - Page 22

• Manufacturer Part Number: PIC24FJ16GA
• Description: 28/44-Pin General Purpose, 16-Bit Flash Microcontrollers
• Manufacturer: MICROCHIP [Microchip Technology]

PIC24FJ64GA004 FAMILY
2.2
REGISTER 2-1:
DS39881C-page 20
bit 15
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 15-9
bit 8
bit 7-5
bit 4
bit 3
bit 2
bit 1
bit 0
Note 1:
R/W-0
IPL2
U-0
—
2:
(2)
CPU Control Registers
(1)
The IPL Status bits are read-only when NSTDIS (INTCON1<15>) = 1.
The IPL Status bits are concatenated with the IPL3 bit (CORCON<3>) to form the CPU Interrupt Priority
Level (IPL). The value in parentheses indicates the IPL when IPL3 = 1.
Unimplemented: Read as ‘0’
DC: ALU Half Carry/Borrow bit
1 = A carry-out from the 4th low-order bit (for byte-sized data) or 8th low-order bit (for word-sized data)
0 = No carry-out from the 4th or 8th low-order bit of the result has occurred
IPL2:IPL0: CPU Interrupt Priority Level Status bits
111 = CPU interrupt priority level is 7 (15); user interrupts disabled.
110 = CPU interrupt priority level is 6 (14)
101 = CPU Interrupt Priority Level is 5 (13)
100 = CPU interrupt priority level is 4 (12)
011 = CPU interrupt priority level is 3 (11)
010 = CPU interrupt priority level is 2 (10)
001 = CPU interrupt priority level is 1 (9)
000 = CPU interrupt priority level is 0 (8)
RA: REPEAT Loop Active bit
1 = REPEAT loop in progress
0 = REPEAT loop not in progress
N: ALU Negative bit
1 = Result was negative
0 = Result was non-negative (zero or positive)
OV: ALU Overflow bit
1 = Overflow occurred for signed (2’s complement) arithmetic in this arithmetic operation
0 = No overflow has occurred
Z: ALU Zero bit
1 = An operation which effects the Z bit has set it at some time in the past
0 = The most recent operation which effects the Z bit has cleared it (i.e., a non-zero result)
C: ALU Carry/Borrow bit
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
R/W-0
IPL1
of the result occurred
U-0
—
SR: ALU STATUS REGISTER
(2)
(1)
W = Writable bit
‘1’ = Bit is set
R/W-0
IPL0
U-0
—
(2)
(1)
U-0
R-0
RA
—
Preliminary
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R/W-0
U-0
—
N
(1,2)
R/W-0
U-0
OV
—
© 2008 Microchip Technology Inc.
x = Bit is unknown
R/W-0
U-0
—
Z
R/W-0
R/W-0
DC
C
bit 8
bit 0