
Programmer’s Reference
DSP56364 24-Bit Digital Signal Processor Users Manual, Rev. 2
Freescale Semiconductor C-9
Figure C-1. Status Register (SR)
Application:
Date:
Programmer:
Sheet 1 of 5
Central Processor
1514131211109876543210
UZVC
19 18 17 1623 22 21 20
LLF S1SM I1 I0CE SA FV S0 N
Scaling Mode
S(1:0) Scaling Mode
00
01
10
11
No scaling
Scale down
Scale up
Reserved
*
0
*
0
Interrupt Mask
I(1:0) Exceptions Masked
00
01
10
11
None
IPL 0
IPL 0, 1
IPL 0, 1, 2
Carry
Over
Zero
Negative
Unnormalized ( U = Acc(47) xnor Acc(46) )
Extension
Limit
FFT Scaling ( S = Acc(46) xor Acc(45) )
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
01
10
11
0 (lowest)
1
2
3 (highest)
Mode Register (MR) Condition Code Register (CCR)Extended Mode Register (MR)
Status Register (SR)
Read/Write
Reset = $C00300
CP1 CP0 RM DM SC S E
†
= Reserved, Program as 0
† = The CE bit must be kept clear
*
0
Kommentare zu diesen Handbüchern