dsp56001a Freescale Semiconductor, Inc, dsp56001a Datasheet - Page 77

• Manufacturer Part Number: dsp56001a
• Description: 24-bit Digital Signal Processor
• Manufacturer: Freescale Semiconductor, Inc

MOVEP Immediate instructions take 3 instruction cycles on the DSP56001. On the DSP56001A,
these instructions take only 2 instruction cycles. DSP56001 software that is dependent on the
timing of this form of the MOVEP instruction must be modified when ported to the DSP56001A.
The instructions listed in Table 4-1 will not generate an illegal instruction interrupt on the
DSP56001A. None of these instructions are tested on the DSP56001A and should not be used.
Wake-up from the Stop and Wait operating modes with IRQA and IRQB is longer on the
DSP56001A by one Tc period.
On the DSP56001A, the SCI and SSI clocks are stopped when the peripherals are not enabled in
order to save power. As a result, the initialization time of the SCI and SSI is longer on the
DSP56001A than on the DSP56001.
MOTOROLA
DEBUG
DEBUGcc
DEC
INC
MAC #iiii
MPY #iiii
MACR #iiii
MPYR #iiii
MOVEP IMMEDIATE
ILLEGAL INSTRUCTIONS
STOP/WAIT TIMING
SCI/SSI INITIALIZATION TIMING
—
Instruction Symbol
—
DO NOT USE
Note: The DEBUG and DEBUGcc instructions are microcoded on the DSP56001A,
DO NOT USE
but the peripherals necessary to make use of this instruction are not available.
Any use of the DEBUG or DEBUGcc instructions will completely halt the
processor. The processor will exit this state only on reset.
Freescale Semiconductor, Inc.
For More Information On This Product,
Table 4-1 Illegal Instructions
Go to: www.freescale.com
DSP56001A/D, Rev. 1
Signed multiply-accumulate immediate
Signed multiply immediate
Signed multiply-accumulate and round immediate
Signed multiply and round immediate
Enter Debug mode
Enter Debug mode conditionally
Decrement by one
Increment by one
Substituting the DSP56001A for the DSP56001
Instruction Name
DSP56001A
4-3