MS87V1021 datasheet(49/63 Pages) OKI

Part #	MS87V1021

Description	Recording and Playback IC with Built-in 2-Mbit DRAM

PDF	63 Pages

Scroll/Zoom	100%

Manufacturer	OKI [OKI electronic componets]

Direct Link	http://www.oki.com

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49 / 63 page

PEDS87V1021-01

1Semiconductor

MS87V1021

49/63

MEMORY ALLOCATION

Storing Sound Data to DRAM (In Pages)

The on-die 2-Mbit DRAM consists of 2048 pages, 1024 bits for each page. The first 24-bit memory space of each

page is allocated for storing ADPCM intermediate data and the remaining 1000-bit space for storing ADPCM

(sound) data.

For additional information on data structures of pages allocated for address control in Normal Mode, see

“Controlling Addresses of Sound Data in Normal Mode” later in this document.

Page 0

000h to 07Fh

Page 1

080h to 0FFh

Page 2

100h to 17Fh

Page 3

180h to 1FFh

Page 2042

3FD00 to 3FD7Fh

Page 2043

3FD80 to 3FDFFh

Page 2044

3FE00 to 3FE7Fh

Page 2045

3FE80 to 3FEFFh

Page 2046

3FF00 to 3FF7Fh

Page 2047

3FF80 to 3FFFFh

Note: “DRAM Address” means the addresses used with the Adrrd and Adrwr commands,

i.e. Stadr[23:0] and Enadr[23:0].

24 bit

1000 bit

1024 bit

DRAM

Address *

Pages on DRAM

MS87V1021 Datasheet(PDF) 49 Page - OKI electronic componets