MSM6652 datasheet(32/45 Pages) OKI

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¡ Semiconductor

MSM6650 Family

FEDL6650-03

4.MSM6650

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

Symbol Type

Description

RESET

CMD

Reset. The devices enter stanby status when a low level is input to this pin.

When RESET, oscillation stops. The AOUT output goes to ground and the IC

status is reinitalized.

This pin has an internal pull-up resistor.

I6/SD

I5/SI

BUSY

NAR

Busy. Outputs a "L" level during playback and a "H" level when power is turned ON.

The CMD and ST inputs become effective when high. NAR indicates whether the

address bus (I0 through I6) is ready to accept another address. When high, it is

ready to accept. NAR goes high when power is turned ON.

AOUT

Analog Speech Output. D/A converter output or LPF output is selected by

entering the command.

Ceramic Oscillator Output. If an external clock is used, leave this pin open.

Command Input and Option Control. This pin is used as command and

option input when CMD is at the high level with

ST low. If this pin is not used or

serial input is optioned, set this pin to "H" level. This pin has an internal pull-up

resistor.

Start. Speech playback starts at the fall of the

ST pulse. The I0 - I6 addresses

are latched at the rise of the

ST pulse. Input a ST pulse when NAR goes to the

high level for channels 1 and 2. This pin has an internal pull-up resistor.

Channel Control. Channel 1 is selected when the input is pulled high. Channel 2

is selected when the input is low. This pin has an internal pull-up resistor.