UPD77017 datasheet(19/60 Pages) NEC

Il numero della parte	UPD77017

Spiegazioni elettronici	16 bits, Fixed-point Digital Signal Processor

PDF	60 Pages

Scroll/Zoom	100%

Produttore elettronici	NEC [NEC]

Homepage	http://www.nec.com/

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19 / 60 page

µPD77015, 77017, 77018

2.3.6

CJC: Condition Judge Circuit

CJC judges whether condition is true or false with 40 bits input data. A conditional instruction is executed

when the result is true, and not executed when the result is false.

2.4

Memory

The

µPD77017 has one instruction memory area (64K words × 32 bits) and two data memory areas (64K words

× 16 bits each). It adopts Harvard-type architecture, with instruction memory area and data memory areas

separated.

The

µPD77017 has 2 sets of data addressing units, which are dedicated for addressing data memory area.

Each addressing unit consists of four data pointers, four index registers, a modulo register and addressing ALU.

X memory area addresses are specified by DP0 to DP3, and Y memory area addresses are specified by DP4

to DP7. After memory access, DPn (with the same subscript), can be modified by DNn value. Modulo operation

is performed with DMX for DP0 to DP3, with DMY for DP4 to DP7.

UPD77017 Scheda tecnica(PDF) 19 Page - NEC