MSM9802 View Datasheet(PDF) - Oki Electric Industry

Part Name

Description

Manufacturer

MSM9802

Voice Synthesis IC with Built-in Mask ROM

Oki Electric Industry 

¡ Semiconductor

MSM9802/03/05-xxx

A2, A1

00

01

10

11

Table 3.2 Random Playback Address

A0, SW2 to SW0

0001

0010

0011

0100

1111

0001

0010

0011

0100

1111

0001

0010

0011

0100

1111

0001

1111

Phrase (Sample)

Hit

Hit

Hit

Out

Out

Hit

Out

Out

Out

Out

White

Black

Red

Blue

Green

For a random address, 15 phrases can be set for each logical condition of addresses A2 and A1

(i.e., "00", "01", "10", and "11").

In random playback, the four logic states ("000000", "010000", "100000" and "110000") in user-

specified phrases cannot be used. Take it into consideration when creating ROM data.

A random address is set by the "H" level time of the RND pin, so if the same pulse width is input

by microcontroller, the random address fixed time becomes constant, and a random phrase may

not be played under these conditions. The random address fixed time must be inconsistent in

order to produce random playback.

RND (I)

BUSY (O)

Invalid pulse

Pulse input during this time period is invalid

AOUT (O)

Oscillation start

Figure 3.4 Timing when a Pulse is Input to the RND Pin During Random Playback

17/51

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