ML2302TB datasheet(5/24 Pages) OKI

部件名	ML2302TB

功能描述	Recording and Playback LSI with Built-in 2-Bit ADPCM2 Supported FIFO

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制造商	OKI [OKI electronic componets]

网页	http://www.oki.com

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5 / 24 page

FEDL2302DIGEST-05

OKI Semiconductor

ML2302

5/24

PIN DESCRIPTIONS

(WCSP)

(TQFP)

Symbol

Type

Description

H2, G2,

F2, G1,

F3, F1,

E2, E1

1 to 8

D7 to 0

I/O

Bidirectional data bus.

Command and data inputs from an external microcontroller and

memory, and status and data outputs to an external

microcontroller and memory.

G7

47

WR

I

Write pulse input pin. This pin pulses “L” when command or

voice data is input to D7 to D0 pins.

H9

48

RD

I

Read pulse input pin. This pin pulses “L” when status or voice

data is output to D7 to D0.

J2

64

CS

I

Accepts write pulse and read pulse when this pin is “L”.

G3

63

D/

C

I

Voice data is input or output to and from D7 to D0 when this pin

is “H”.

H3

62

BUSY

O

This pin outputs a “L” level during RECORDING, PLAYBACK,

or PAUSE.

E7

41

CBUSY

O

Accepts a command during this pin is “H”.

F8

43

EMP

O

“H” indicates that there is no data in FIFO memory.

During playback, voice synthesis starts when EMP changes to

“L”. Active “H” can be changed to active “L”.

F7

44

MID

O

“H” level indicates that there is more than half of the FIFO

memory.

G9

45

FUL

O

“H” level indicates that FIFO memory is full of data. During

playback, this pin is “H” and data cannot be written in FIFO

memory. During recording, data is not written after FIFO

memory is full of data.

Active “H” can be changed to active “L”.

F9

42

CH

I

This pin should be set at a “L” level normally and be set at a “H”

level when DMA is used.

H5

55

DREQL

O

When DMA transfer is selected, “H” level DREQL outputs a

signal to request a DMA transfer. Active “H” can be changed to

active “L”.

J5

56

DACKL

I

Input to

DACKL a signal when DMA transfer is permitted by the

DMA controller. when DACKL is “L”,

IOW and IOR signals are

accepted.

Active “L” can be changed to active “H” by command input.

If DMA transfer is not used, set this pin to “H” level.

G6

54

IOW

I

Write pulse Input pin to write external memory data to ML2302

during DMA transfer. If DMA transfer is not used, set this pin to

“H” level.

J6

53

IOR

I

Read pulse input pin to read data of ML2302 during DMA

transfer.

If DMA transfer is not used, set this pin to “H” level.

H4

59

ADSD

I

16-bit serial data input pin when external A/D converter is used.

If external A/D converter is not used, set this pin to “L” level.

G4

60

DASD

O

16-bit serial data input pin when external D/A converter is used.

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