Texas Instruments C28 Series, Student Manual

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C28x CPU
Multiplier, ALU, and Shifters
XT (32) or T/TL
XT (32) or T/TL
MULTIPLIER MULTIPLIER
32 x 32 or
32 x 32 or
Dual 16 x 16
Dual 16 x 16
P (32) or PH/PL
P (32) or PH/PL
AH (16)
AH (16)
C28x Multiplier and ALU / Shifters
C28x Multiplier and ALU / Shifters
Data Bus
Data Bus
Data Bus
Data Bus
Program Bus
Program Bus
ALU (32)
ALU (32)
32 32
32 32
32 32
32 32
32
32
AL (16)
AL (16)
32 32
32 32
• •
16/32 16/32
8/16 8/16
Shift R/L (0 Shift R/L (0 - - 16) 16)
ACC (32) ACC (32)
AH.MSB AH.LSB AH.MSB AH.LSB AL.MSB AL.LSB AL.MSB AL.LSB
32 32
Shift R/L (0
Shift R/L (0
-
-
16)
16)
• •
32
32
Shift R/L (0 Shift R/L (0 - - 16) 16)
32 32
16 16
The 32 x 32-bit MAC capabilities of the C28x and its 64-bit processing capabilities, enable the
C28x to efficiently handle higher numerical resolution problems that would otherwise demand a
more expensive floating-point processor solution. Along with this is the capability to perform
two 16 x 16-bit multiply accumulate instructions simultaneously or Dual MACs (DMAC).
C28x
C28x
XARn
XARn
, DP and Memory
, DP and Memory
XAR0 XAR0
XAR1 XAR1
XAR2 XAR2
XAR3 XAR3
XAR4 XAR4
XAR5 XAR5
XAR6 XAR6
XAR7
XAR7
ARAU ARAU
MUX MUX
Data Memory Data Memory
MUX
MUX
DP (16) DP (16)
Data Bus
Data Bus
Program Bus
Program Bus
6 LSB
6 LSB
from IR
from IR
XARn XARn
→ →
32 32 - - bits bits
ARn ARn
→
→
16 16 - - bits bits
22 22
32
32
C28x - Architecture Overview 1 - 5