¡ Semiconductor
MSM98P05
PIN DESCRIPTIONS
Pin
DIP
SOP
Symbol
Type
Description
The IC enters the standby state if this pin is set to "L" level. At this time,
5
17
RESET
I
oscillation stops and AOUT drives a current of 0mA and becomes GND level,
then the IC returns to the initial state. Apply a "L" pulse during power-on.
This pin has an internal pull-up resistor.
7
6
15
20
18
7
BUSY
XT/CR
CPU/STD
O
I
I
Outputs "L" level while voice is being played back.
In "H" level when power is turned ON.
XT/RC switching pin. Set to "H" level if ceramic oscillation is used. Set to "L"
level if RC oscillation is used.
Microcontroller interface/stand-alone mode switching pin. Set to "L" level if
the IC is used in stand-alone mode.
Volume setting pin. If this pin is set to GND level, the maximum amplitude is
9
23
V
REF
I
delivered. If this pin is set to V
DD
level, the minimum amplitude is delivered.
This pin is internally connected to a pull-down resistor of approx. 10 kW
during IC operation.
Voice output pin.
10
8
11
24
22
1
AOUT
GND
V
DD
O
—
—
The voice signals are output as current changes. A logic "L" is output from
this pin in standby state.
Ground pin.
Power supply pin. Insert a bypass capacitor of 0.1
mF
or more between V
DD
and GND pins.
Ceramic oscillator connection pin when ceramic oscillation is selected.
12
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.
13
3
OSC2
O
RC connection pin when RC oscillation is selected.
Leave this pin open if external clock is used.
Outputs "L" level in standby state.
Leave this pin open when ceramic oscillation is used.
14
5
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.
16
8
RND
I
Fetches addresses from random address generation circuit in the IC at the
falling edge of
RND.
Set to "H" level when the random playback function is
not used. This pin has internal pull-up resistor.
4/13
OKI [ OKI ELECTRONIC COMPONETS ]
