msm9802 Oki Semiconductor, msm9802 Datasheet - Page 14

• Manufacturer Part Number: msm9802
• Description: Voice Synthesis Ic With Built-in Mask Rom
• Manufacturer: Oki Semiconductor

FUNCTIONAL DESCRIPTION
Playback Code Specification
The user can specify a maximum of 56 phrases. Table 1.1 shows the settings by the A2-A0 and SW2-SW0 pins.
Pull-up/Pull-down Resistor
The RESET and RND pins have internal pull-up resistors and the SW2-SW0 pins have internal pull-down
resistors.
Stand-alone Mode
In a stand-alone mode, the SW input interface function and the random playback function can be used.
SW input interface
With the SW input interface, speech synthesis starts when the state of the SW2-SW0 pins has changed. To prevent
chattering, the address data is latched 16 ms (t
not start if the state of the A2-A0 pins has changed. Set the RND pin to “H” level if the random playback function
is not used.
Set the A2-A0 pins to “L” level at power-on or at reset.
The SW input interface is effective when the MSM9802/03/05 is operated using a push-button switch. Voice
synthesis starts when an address is changed by pressing the push-button switch. If the push-button switch is
released during playback, then playback stops after the current phrase is completed.
OKI Semiconductor
SW2~SW1 (I) “L”
AOUT (O)
BUSY (O)
A2-A0 (I)
A2-A0
SW0 (I)
000
111
Figure 3.1 SW Input Interface Single-Phrase Playback Timing
Oscillation start
SW2-SW0
Table 1.1 User-specified Phrases
t
CHA
000
001
111
t
w(SW)
CHA
) after the state of SW2-SW0 has changed. Voice synthesis does
User-specified phrase
Code Details
(56 phrases)
Inhibit code
MSM9802/03/05-xxx
FEDL9802-03-05-05
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