PDSP1601/PDSP1601A

9

MARAX

MAAPR

MABPR

MARSX

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.

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.

MSA1

0

0

1

1

A-MUX

Output

ALU REGISTER FILE OUPUT

A-PORT INPUT

B-PORT INPUT

SHIFTER REGISTER FILE OUTPUT

MSB

0

1

B-MUX

Output

B-PORT INPUT

SHIFTER REGISTER FILE OUTPUT

MSS

0

1

S-MUX

Output

B-PORT INPUT

SHIFTER REGISTER FILE OUTPUT

MSC

0

1

C-MUX

Output

ALU REGISTER FILE OUTPUT

SHIFTER REGISTER FILE OUTPUT

Table 5

MSA0

0

1

0

1