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ST10F272Z2 Datasheet(PDF) 49 Page - STMicroelectronics

Part # ST10F272Z2
Description  16-bit MCU with 256 Kbyte Flash memory and 20 Kbyte RAM
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST10F272Z2 Datasheet(HTML) 49 Page - STMicroelectronics

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ST10F272Z2
Central processing unit (CPU)
49/189
7.1
Multiplier-accumulator unit (MAC)
The MAC co-processor is a specialized co-processor added to the ST10 CPU Core in order
to improve the performances of the ST10 Family in signal processing algorithms.
The standard ST10 CPU has been modified to include new addressing capabilities which
enable the CPU to supply the new co-processor with up to 2 operands per instruction cycle.
This new co-processor (so-called MAC) contains a fast multiply-accumulate unit and a
repeat unit.
The co-processor instructions extend the ST10 CPU instruction set with multiply, multiply-
accumulate, 32-bit signed arithmetic operations.
Figure 8.
MAC unit architecture
Operand 2
Operand 1
Control Unit
Repeat Unit
ST10 CPU
Interrupt
Controller
MSW
MRW
MAH
MAL
MCW
Flags MAE
Mux
8-bit Left/Right
Shifter
Mux
Mux
Sign Extend
16 x 16
Concatenation
signed/unsigned
Multiplier
40-bit Signed Arithmetic Unit
0h
0h
08000h
40
16
40
40
32
32
16
40
40
40
40
40
Scaler
AB
40
GPR Pointers *
IDX0 Pointer
IDX1 Pointer
QR0 GPR Offset Register
QR1 GPR Offset Register
QX0 IDX Offset Register
QX1 IDX Offset Register
Note: * Shared with standard ALU


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