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ST10F296E Datasheet(PDF) 93 Page - STMicroelectronics

Part # ST10F296E
Description  High performance 16-bit CPU with DSP functions
PDF  346 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST10F296E Datasheet(HTML) 93 Page - STMicroelectronics

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7.1
Multiplier-accumulator unit (MAC)
The specialized MAC coprocessor has been added to the ST10 CPU core to improve the
computing performances of the ST10 device during signal processing tasks.
The standard ST10 CPU has been modified to include new addressing capabilities which
enable the CPU to supply the new coprocessor with up to two operands per instruction
cycle.
This new MAC coprocessor contains a fast multiply-accumulate unit and a repeat unit.
The coprocessor instructions extend the ST10 CPU instruction set with multiply, multiply-
accumulate, and 32-bit signed arithmetic operations.
Figure 17.
MAC unit architecture
1.
Shared with standard ALU
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(1)
IDX0 pointer
IDX1 pointer
QR0 GPR offset register
QR1 GPR offset register
QX0 IDX offset register
QX1 IDX offset register
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