DSPIC30F2023 Microchip Technology Inc., DSPIC30F2023 Datasheet - Page 25
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DSPIC30F2023
Manufacturer Part Number
DSPIC30F2023
Description
28/44-pin Dspic30f1010/202x Enhanced Flash Smps 16-bit Digital Signal Controller
Manufacturer
Microchip Technology Inc.
Datasheet
1.DSPIC30F2023.pdf
(286 pages)
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2.4
The DSP engine consists of a high speed 17-bit x
17-bit multiplier, a barrel shifter, and a 40-bit adder/sub-
tracter (with two target accumulators, round and
saturation logic).
The DSP engine also has the capability to perform inher-
ent
require no additional data. These instructions are ADD,
SUB and NEG.
TABLE 2-2:
© 2006 Microchip Technology Inc.
CLR
ED
EDAC
MAC
MAC
MOVSAC
MPY
MPY.N
MSC
accumulator-to-accumulator
DSP Engine
Instruction
DSP INSTRUCTION SUMMARY
operations,
which
Algebraic Operation
Preliminary
A = 0
A = (x – y)
A = A + (x – y)
A = A + (x * y)
A = A + x
No change in A
A = x * y
A = – x * y
A = A – x * y
2
The DSP engine has various options selected through
various bits in the CPU Core Configuration Register
(CORCON), as listed below:
1.
2.
3.
4.
5.
6.
7.
A block diagram of the DSP engine is shown in
Figure 2-2.
2
Note:
dsPIC30F1010/202X
2
Fractional or integer DSP multiply (IF).
Signed or unsigned DSP multiply (US).
Conventional or convergent rounding (RND).
Automatic saturation on/off for ACCA (SATA).
Automatic saturation on/off for ACCB (SATB).
Automatic saturation on/off for writes to data
memory (SATDW).
Accumulator
(ACCSAT).
For CORCON layout, see Table 3-3.
Saturation
mode
ACC WB?
DS70178C-page 23
Yes
Yes
Yes
Yes
No
No
No
No
No
selection
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