dsPIC30F Family Reference Manual
DS70049C-page 2-14 © 2004 Microchip Technology Inc.
Register 2-2: CORCON: Core Control Register
Upper Byte:
U-0 U-0 U-0 R/W-0 R/W-0 R-0 R-0 R-0
— — — US EDT DL<2:0>
bit 15 bit 8
Lower Byte:
R/W-0 R/W-0 R/W-1 R/W-0 R/C-0 R/W-0 R/W-0 R/W-0
SATA SATB SATDW ACCSAT IPL3 PSV RND IF
bit 7 bit 0
bit 15-13 Unimplemented: Read as '0’
bit 12 US: DSP Multiply Unsigned/Signed Control bit
1 = DSP engine multiplies are unsigned
0 = DSP engine multiplies are signed
bit 11 EDT: Early DO Loop Termination Control bit
1 = Terminate executing DO loop at end of current loop iteration
0 = No effect
Note: This bit will always read as ‘0’.
bit 10-8 DL<2:0>: DO Loop Nesting Level Status bits
111 = 7 DO loops active
•
•
001 = 1 DO loop active
000 = 0 DO loops active
bit 7 SATA: AccA Saturation Enable bit
1 = Accumulator A saturation enabled
0 = Accumulator A saturation disabled
bit 6 SATB: AccB Saturation Enable bit
1 = Accumulator B saturation enabled
0 = Accumulator B saturation disabled
bit 5 SATDW: Data Space Write from DSP Engine Saturation Enable bit
1 = Data space write saturation enabled
0 = Data space write saturation disabled
bit 4 ACCSAT: Accumulator Saturation Mode Select bit
1 = 9.31 saturation (super saturation)
0 = 1.31 saturation (normal saturation)
bit 3 IPL3: CPU Interrupt Priority Level Status bit 3
1 = CPU interrupt priority level is greater than 7
0 = CPU interrupt priority level is 7 or less
Note: The IPL3 bit is concatenated with the IPL<2:0> bits (SR<7:5>) to form the CPU interrupt
priority level.
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