70291E Datasheet, PDF (31/436 Pages) Microchip Technology – High-Performance, 16-bit Digital Signal Controllers

dsPIC33FJ32MC302/304, dsPIC33FJ64MCX02/X04 AND dsPIC33FJ128MCX02/X04
REGISTER 3-2: CORCON: CORE CONTROL REGISTER
U-0
—
bit 15
U-0
U-0
R/W-0
R/W-0
—
—
US
EDT⁽¹⁾
R-0
R-0
DL<2:0>
R-0
bit 8
R/W-0
SATA
bit 7
R/W-0
SATB
R/W-1
SATDW
R/W-0
ACCSAT
R/C-0
IPL3⁽²⁾
R/W-0
PSV
R/W-0
RND
R/W-0
IF
bit 0
Legend:
R = Readable bit
0’ = Bit is cleared
C = Clear only bit
W = Writable bit
‘x = Bit is unknown
-n = Value at POR
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
bit 15-13
bit 12
bit 11
bit 10-8
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
Unimplemented: Read as ‘0’
US: DSP Multiply Unsigned/Signed Control bit
1 = DSP engine multiplies are unsigned
0 = DSP engine multiplies are signed
EDT: Early DO Loop Termination Control bit⁽¹⁾
1 = Terminate executing DO loop at end of current loop iteration
0 = No effect
DL<2:0>: DO Loop Nesting Level Status bits
111 = 7 DO loops active
•
•
•
001 = 1 DO loop active
000 = 0 DO loops active
SATA: ACCA Saturation Enable bit
1 = Accumulator A saturation enabled
0 = Accumulator A saturation disabled
SATB: ACCB Saturation Enable bit
1 = Accumulator B saturation enabled
0 = Accumulator B saturation disabled
SATDW: Data Space Write from DSP Engine Saturation Enable bit
1 = Data space write saturation enabled
0 = Data space write saturation disabled
ACCSAT: Accumulator Saturation Mode Select bit
1 = 9.31 saturation (super saturation)
0 = 1.31 saturation (normal saturation)
IPL3: CPU Interrupt Priority Level Status bit 3⁽²⁾
1 = CPU interrupt priority level is greater than 7
0 = CPU interrupt priority level is 7 or less
PSV: Program Space Visibility in Data Space Enable bit
1 = Program space visible in data space
0 = Program space not visible in data space
Note 1: This bit is always read as ‘0’.
2: The IPL3 bit is concatenated with the IPL<2:0> bits (SR<7:5>) to form the CPU interrupt priority level.
© 2011 Microchip Technology Inc.
DS70291E-page 31