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D950-CORE Datenblatt(PDF) 14 Page - STMicroelectronics

Teilenummer D950-CORE
Bauteilbeschribung  16-Bit Fixed Point Digital Signal Processor DSP Core
PDF  89 Pages
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

D950-CORE Datenblatt(HTML) 14 Page - STMicroelectronics

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D950-Core
4.1.2 Registers
There are two types of registers: data registers and control registers. All registers are direct
addressed. Registers can be read or written through the X and Y buses. All of the DCU parts
(multiplier, BSU, ALU, BMU) operate on these registers.
Data registers
L0 / L1:
2 x 16-bit input Left registers.
R0 / R1:
2 x 16-bit input Right registers.
A0 / A1:
2 x 40-bit Accumulators, each made of the concatenation of an 8-bit extension
A0E (resp. A1E), a 16-bit MSB A0H (resp. A1H) and a 16-bit LSB A0L (resp. A1L).
These registers are dedicated to extended precision calculations, in order to
provide up to 240 dB of dynamic range.
P:
32-bit multiplier result register made of the concatenation of PH (MSB) and PL
(LSB) 16-bit registers
Table 4.1
Data Register Structure.
L
L1
L0
32-bit Input Left
31
16
15
0
R
R1
R0
32-bit Input Right
31
16
A0
A0E
A0H
A0L
40-bit Accumulator 0
39
32
31
16
A1
A1E
A1H
A1L
40-bit Accumulator 1
39
32
31
16
15
0
P
PH
PL
32-bit Multiplier Result
31
16
15
0
L
L1
0
16-bit Input Left
31
16
15
0
L
L0
0
16-bit Input Left
31
16
15
0
R
R1
0
16-bit Input Right
31
16
15
0
R
R0
0
16-bit Input Right
5



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