UPD77019 datasheet(21/56 Pages) NEC

tên linh kiện	UPD77019

Giải thích chi tiết về linh kiện	16 bits, Fixed-point Digital Signal Processor

PDF	56 Pages

Scroll/Zoom	100%

nhà sản xuất	NEC [NEC]

Trang chủ	http://www.nec.com/

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21 / 56 page

µPD77018A, 77019

2.4.2

Data Memory Outline

The

µPD77018A and the µPD77019 each has two data memory areas (64K words × 16 bits each) in X and

Y memory areas.

Every memory areas consists of 3K words

× 16 bits data RAM and 12K words ×16 bits data ROM . As the

µPD77018A and the µPD77019 each has interface with the external data memory, 16 K words × 16 bits external

data memory space can be added to X/Y memories.

Each data memory area includes on-chip peripheral area which consists of 64 words.

When the external data memory area is accessed, instruction cycle can be 2 or more by wait function.

Caution

When any data is accessed or stored to system address, normal operation of the device is

not assured.

3840H

383FH

0000H

System (1984 words)

System (11K words)

Data RAM (3K words)

External Data Memory

(16K words)

PD77018A, 77019

Peripheral (64 words)

4000H

3FFFH

FFFFH

System (20K words)

0C00H

0BFFH

7000H

6FFFH

C000H

BFFFH

Data ROM (12K words)

3800H

37FFH

UPD77019 bảng dữ liệu(PDF) 21 Page - NEC