Figure D-1 Status Register (Sr - Motorola DSP56309 User Manual

Application:
Central Processor
Unnormalized ( U = Acc(47) xnor Acc(46) )
Extension
Limit
FFT Scaling ( S = Acc(46) xor Acc(45) )
Scaling Mode
S(1:0) Scaling Mode
00 No scaling
01 Scale down
10 Scale up
11 Reserved
Reserved
Sixteen-Bit Compatibilitity
Double Precision Multiply Mode
Loop Flag
DO-Forever Flag
Sixteenth-Bit Arithmetic
Reserved
Instruction Cache Enable
Arithmetic Saturation
Rounding Mode
Core Priority
CP(1:0) Core Priority
00 0 (lowest)
01 1
10 2
11 3 (highest)
23 22 21 20 19 18 17 16
CP1 CP0 RM SM CE
Extended Mode Register (MR)
Status Register (SR)
Read/Write
Reset = $C00300
MOTOROLA
Interrupt Mask
I(1:0) Exceptions Masked
00 None
01 IPL 0
10 IPL 0, 1
11 IPL 0, 1, 2
15 14 13 12 11 10 9
* SA FV LF DM SC
0
Mode Register (MR)

Figure D-1 Status Register (SR)

DSP56309UM/D
Carry
Overßow
Zero
Negative
8 7
* S1 S0 I1 I0 S
0
Condition Code Register (CCR)
*
= Reserved, Program as 0
Programming Reference
Date:
Programmer:
Sheet 1 of 5
6 5 4 3 2 1
L E U N Z V
0
C
D-15