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MSM6652

Internal Mask ROM Voice Synthesis IC, Internal One-Time-Programmable (OTP) ROM Voice Synthesis IC, External ROM Drive Voice Synthesis IC

Oki Electric Industry 

¡ Semiconductor

FEDL6650-03

MSM6650 Family

4. MSM6650

64-Pin plastic QFP (64-Pin plastic SDIP)

Pin

29(19)

3(57)

15(5)

5 (59)

10(64)

11(1)

12(2)

14(4)

21-24

(11-14)

25-27

(15-17)

Symbol Type

Description

RESET

Reset. Setting this pin to "L" puts the LSI in standby status. At this time,

I oscillation stops, AOUT is pulled to GND, and the deveice is initialized.

This pin has an internal pull-up resistor.

BUSY

Busy. This pin outputs a "L" level during playback. At power-on, this pin is at "H"

O

level.

XT/CR

XT/CR selectable pin. Set to "H" level when using ceramic oscillation. Set to

I

"L" level when using RC oscillation.

AOUT O Sound Output. This is the synthesized output pin of the internal low-pass filter.

Oscillator 1. This pin is a ceramic oscillator connection pin when using ceramic

XT/OSC1 I oscillation. This pin is an RC connection pin when using RC oscillation.

When using an external clock, use this pin as the clock input.

Oscillator 2. This pin is a ceramic oscillator connection pin when using a

XT/OSC2 O ceramic oscillator. This is an RC connection pin when using RC oscillation.

Leave open if using an external clock. OSC2 outputs a "L" level in standby status.

OSC3

Oscillator 3. Leave open if using a ceramic oscillator. This pin is the RC

O connection pin when using RC oscillation. When RC oscillation is selected, OSC3

outputs a "H" level in standby status.

Random Playback. Random playback starts when the RND pin is set to a "L"

RND

I level. At the fall of RND, addresses from the random address playback circuit

inside the IC are fetched. Set to a "H" level if random playback is not used.

This pin has an internal pull-up resistor.

SW0-SW3 I

Phrase Inputs. These pins are phrase input pins corresponding to playback.

If the input changes, SW0 to SW3 pins capture address data after 16 ms and

speech playback commences. These pins have internal pull-down resistors.

A0-A2

Phrase Inputs. Phrase input pins correspoding to playback. The A0 input

I

becomes invalid when the random playback function is used.

13/45

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