MSM9803 View Datasheet(PDF) - Oki Electric Industry
Part Name
Description
Manufacturer
MSM9803 Datasheet PDF : 52 Pages
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¡ Semiconductor
MSM9802/03/05-xxx
PIN DESCRIPTIONS
Pin
Symbol Type
DIP SOP SSOP
Description
The IC enters the standby state if this pin is set to "L" level. At this time,
oscillation stops and AOUT drives a current of 0mA and becomes GND
4 17 21
RESET
I level, then the IC returns to the initial state.
Apply a "L" pulse upon power-on.
This pin has an internal pull-up resistor.
6 20 25
BUSY
Outputs "L" level while voice is being played back.
O
At power-on, this pin is at "H" level.
5 18 23
XT/CR
XT/RC switching pin. Set to "H" level if ceramic oscillation is used.
I
Set to "L" level if RC oscillation is used.
14 7
8
CPU/STD
Microcontroller interface/stand-alone mode switching pin.
I
Set to "L" level if the MSM9802/03/05 is used in stand-alone mode.
Volume setting pin. If this pin is set to GND level, the maximum
8 23 29
VREF
I current is forced in. If this pin is set to VDD level, the minimum current
is forced in. A pull-down resistor of approx. 10 W is internally
connected to this pin during operation.
Voice output pin.
9 24 30
AOUT
O The voice signals are output as current changes. In standby state, this
pin drives a current of 0 mA and becomes GND level.
7 22 28
GND
— Ground pin.
10 1
1
Power supply pin. Insert a bypass capacitor of 0.1 mF or more between
VDD
—
VDD and GND pins.
Ceramic oscillator connection pin when ceramic oscillation is selected.
11 2
2
OSC1
I RC connection pin when RC oscillation is selected.
Input from this pin if external clock is used.
Ceramic oscillator connection pin when ceramic oscillation is selected.
12 3
3
OSC2
RC connection pin when RC oscillation is selected.
O
Leave this pin open if external clock is used.
Outputs "L" level in standby state.
13 5
Leave this pin open when ceramic oscillation is used.
6 OSC3/TEST O RC connection pin when RC oscillation is selected.
Outputs "H" level in standby state when RC oscillation is selected.
Random playback starts if RND pin is set to "L" level.
15 8 10
RND
Fetches addresses from random address generation circuit in the IC at
I fall of RND. Set to "H" level when the random playback function is not
used. This pin has internal pull-up resistor.
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