ML2302 Ver la hoja de datos (PDF) - Oki Electric Industry

Número de pieza

componentes Descripción

Fabricante

ML2302

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

Oki Electric Industry 

OKI Semiconductor

FEDL2302DIGEST-05

ML2302

PIN DESCRIPTIONS

Pin

(WCSP)

H2, G2,

F2, G1,

F3, F1,

E2, E1

G7

Pin

(TQFP)

1 to 8

47

H9

48

J2

64

G3

63

H3

62

E7

41

F8

43

F7

44

G9

45

F9

42

H5

55

J5

56

G6

54

J6

53

H4

59

G4

60

Symbol

D7 to 0

WR

RD

CS

D/C

BUSY

CBUSY

EMP

MID

FUL

CH

DREQL

DACKL

IOW

IOR

ADSD

DASD

Type

Description

Bidirectional data bus.

Command and data inputs from an external microcontroller and

I/O memory, and status and data outputs to an external

microcontroller and memory.

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

I voice data is input to D7 to D0 pins.

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

data is output to D7 to D0.

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

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

is “H”.

O

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

or PAUSE.

O Accepts a command during this pin is “H”.

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

O During playback, voice synthesis starts when EMP changes to

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

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

memory.

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

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

O memory. During recording, data is not written after FIFO

memory is full of data.

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

I

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

level when DMA is used.

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

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

active “L”.

Input to DACKL a signal when DMA transfer is permitted by the

DMA controller. when DACKL is “L”, IOW and IOR signals are

I accepted.

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

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

Write pulse Input pin to write external memory data to ML2302

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

“H” level.

Read pulse input pin to read data of ML2302 during DMA

I transfer.

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

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.

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

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