ST10R272L STMicroelectronics, ST10R272L Datasheet - Page 14

• Manufacturer Part Number: ST10R272L
• Description: 16-BIT Romless MCU WITH MAC UNIT
• Manufacturer: STMicroelectronics

Specifications of ST10R272L

• Cpu Frequency: 0 to 50 MHz
• Power: 3.3 Volt +/-0.3V

ST10R272L - MULTIPLY-ACCUMULATE UNIT (MAC)
5
The MAC is a specialized co-processor added to the ST10R272L CPU core to improve the
performance of signal processing algorithms. It includes:
•
•
•
New addressing capabilities enable the CPU to supply the MAC with up to 2 operands per
instruction cycle. MAC instructions: multiply, multiply-accumulate, 32-bit signed arithmetic
operations and the CoMOV transfer instruction have been added to the standard instruction
set. Full details are provided in the ‘ST10 Family Programming Manual’.
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a multiply-accumulate unit
an address generation unit, able to feed the mac unit with 2 operands per cycle
a repeat unit, to execute a series of multiply-accumulate instructions
MULTIPLY-ACCUMULATE UNIT (MAC)
internal RAM
dual-port
Peripheral
interface
data buses
40-bit ALU
multiplier
16 x16
shifter
operands
Figure 5 MAC architecture
new addressing features
ST10R272L CPU
IDX0
IDX1
MAC CoProcessor
MCW MAL
MRW MAH
QX0
QX1
MSW
control
QR0
QR1
40-bit accumulator
repeat unit
program code
external
memory
program
memory