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參數資料
| 型號： | UPD77111F1 |
| 廠商： | NEC Corp. |
| 英文描述： | Multiconductor Cable; Leaded Process Compatible:Yes RoHS Compliant: Yes |
| 中文描述： | 16位定點數字信號處理器 |
| 文件頁數： | 21/80頁 |
| 文件大?。?/td> | 451K |
| 代理商： | UPD77111F1 |
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Data Sheet U12801EJ4V0DS00
21
μ
PD77110, 77111, 77112
2.2 Arithmetic Unit
This unit performs multiplication, addition, logical operations, and shift, and consists of a 40-bit multiply
accumulator, 40-bit data ALU, 40-bit barrel shifter, and eight 40-bit general-purpose registers.
2.2.1 General-purpose registers (R0 through R7)
These eight 40-bit registers are used to input/output data for arithmetic operations, and load or store data from/to
data memory.
A general-purpose register (R0 to R7) is made up of three parts: R0L through R7L (bits 15 through 0), R0H
through R7H (bits 31 through 16), and R0E through R7E (bits 39 through 32). Depending on the type of operation,
RnL, RnH, and RnE are used as one register or in different combinations.
2.2.2 Multiply accumulator (MAC)
The MAC multiplies two 16-bit values, and adds or subtracts the multiplication result from one 40-bit value, and
outputs a 40-bit value.
The MAC is provided with a shifter (MSFT: MAC ShiFTer) at the stage preceding the input stage. This shifter can
arithmetically shift the 40-bit value to be added to or subtracted from the multiplication result 1 or 16 bits to the right .
2.2.3 Arithmetic logic unit (ALU)
This unit inputs one or two 40-bit values, executes an arithmetic or logical operation, and outputs a 40-bit value.
2.2.4 Barrel shifter (BSFT: Barrel ShiFTer)
The barrel shifter inputs a 40-bit value, shifts it to the left or right by any number of bits, and outputs a 40-bit value.
The data may be arithmetically shifted to the right shifted to the right, in which case the data is sign-extended, or
logically shifted to the right, in which case 0 is inserted from the MSB.
相關PDF資料 |
PDF描述 |
|---|---|
| UPD77110GC | 16-BIT FIXED-POINT DIGITAL SIGNAL PROCESSORS |
| UPD77111GK | 16-BIT FIXED-POINT DIGITAL SIGNAL PROCESSORS |
| UPD77110 | 16-BIT FIXED-POINT DIGITAL SIGNAL PROCESSORS |
| UPD77111 | 16-BIT FIXED-POINT DIGITAL SIGNAL PROCESSORS |
| UPD77112 | 16-BIT FIXED-POINT DIGITAL SIGNAL PROCESSORS |
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| UPD780023AGC-107-8BS-A | 制造商:Renesas Electronics Corporation 功能描述:NECUPD780023AGC-107-8BS-A MASK ROM DEVIC |
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