DSPIC33FJ64GP310AT-I/PF View Datasheet(PDF) - Microchip Technology
Part Name
Description
Manufacturer
DSPIC33FJ64GP310AT-I/PF Datasheet PDF : 322 Pages
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dsPIC33FJXXXGPX06/X08/X10
3.4 CPU Control Registers
CPU control registers include:
• SR: CPU STATUS REGISTER
• CORCON: CORE CONTROL REGISTER
REGISTER 3-1: SR: CPU STATUS REGISTER
R-0
OA
bit 15
R-0
R/C-0
R/C-0
OB
SA(1)
SB(1)
R/W-0(2)
R/W-0(3)
R/W-0(3)
R-0
IPL<2:0>(2)
RA
bit 7
R-0
OAB
R/W-0
N
R/C-0
SAB
R/W-0
OV
R -0
DA
R/W-0
Z
R/W-0
DC
bit 8
R/W-0
C
bit 0
Legend:
C = Clear only bit
S = Set only bit
‘1’ = Bit is set
R = Readable bit
W = Writable bit
‘0’ = Bit is cleared
U = Unimplemented bit, read as ‘0’
-n = Value at POR
x = Bit is unknown
bit 15
bit 14
bit 13
bit 12
bit 11
bit 10
bit 9
OA: Accumulator A Overflow Status bit
1 = Accumulator A overflowed
0 = Accumulator A has not overflowed
OB: Accumulator B Overflow Status bit
1 = Accumulator B overflowed
0 = Accumulator B has not overflowed
SA: Accumulator A Saturation ‘Sticky’ Status bit(1)
1 = Accumulator A is saturated or has been saturated at some time
0 = Accumulator A is not saturated
SB: Accumulator B Saturation ‘Sticky’ Status bit(1)
1 = Accumulator B is saturated or has been saturated at some time
0 = Accumulator B is not saturated
OAB: OA || OB Combined Accumulator Overflow Status bit
1 = Accumulators A or B have overflowed
0 = Neither Accumulators A or B have overflowed
SAB: SA || SB Combined Accumulator ‘Sticky’ Status bit
1 = Accumulators A or B are saturated or have been saturated at some time in the past
0 = Neither Accumulator A or B are saturated
Note: This bit may be read or cleared (not set). Clearing this bit will clear SA and SB.
DA: DO Loop Active bit
1 = DO loop in progress
0 = DO loop not in progress
Note 1: This bit may be read or cleared (not set).
2: The IPL<2:0> bits are concatenated with the IPL<3> bit (CORCON<3>) to form the CPU Interrupt Priority
Level. The value in parentheses indicates the IPL if IPL<3> = 1. User interrupts are disabled when
IPL<3> = 1.
3: The IPL<2:0> Status bits are read only when NSTDIS = 1 (INTCON1<15>).
DS70286C-page 24
© 2009 Microchip Technology Inc.
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