PDSP1601_96 Datasheet, PDF (9/18 Pages) Mitel Networks Corporation – ALU and Barrel Shifter

Multiplexers
There are four user selectable on-chip multiplexers (A-
MUX, B-MUX, S-MUX and C-MUX).
These four multiplexers support instructions as tabulated
in Table 5.
PDSP1601/PDSP1601A
The MUX instructions are latched such that the instruction
will not start executing until the rising edge of CLK latches the
instruction onto the device.
A-MUX
MARAX
MAAPR
MABPR
MARSX
B-MUX
S-MUX
C-MUX
MSA1 MSA0
0
0
0
1
1
0
1
1
MSB
0
1
MSS
0
1
MSC
0
1
Output
ALU REGISTER FILE OUPUT
A-PORT INPUT
B-PORT INPUT
SHIFTER REGISTER FILE OUTPUT
Output
B-PORT INPUT
SHIFTER REGISTER FILE OUTPUT
Output
B-PORT INPUT
SHIFTER REGISTER FILE OUTPUT
Output
ALU REGISTER FILE OUTPUT
SHIFTER REGISTER FILE OUTPUT
Table 5
9