ST10F272Z2Q3 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

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ST10F272Z2Q3

16-bit MCU with 256 Kbyte Flash memory and 20 Kbyte RAM

STMicroelectronics 

Central processing unit (CPU)

ST10F272

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

GPR Pointers *

Operand 1

Operand 2

16 16

IDX0 Pointer

IDX1 Pointer

QR0 GPR Offset Register

QR1 GPR Offset Register

QX0 IDX Offset Register

QX1 IDX Offset Register

Interrupt

Controller

ST10 CPU

MRW

Repeat Unit

MCW

16 x 16

signed/unsigned

Multiplier

Concatenation

32

32

Mux

Sign Extend

Scaler

0h

08000h

40 40 40

Mux

0h

40

40

Mux

40

40

A

B

40-bit Signed Arithmetic Unit

Note: * Shared with standard ALU

Control Unit

MSW

Flags MAE

40

MAH

MAL

40

8-bit Left/Right

Shifter

48/179

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