msm9802 Oki Semiconductor, msm9802 Datasheet - Page 16

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

Random playback starts when the timing shown in Figure 3.3 is input to the RND pin. A random address is fixed
based on the "H" level time of the RND pin during IC oscillation. Random address is captured at the fall of the
RND pin, and voice playback commences. Therefore, when power is turned on, or when RESET is input, the
phrase at fixed address “0001” is played while the random counter remains initialized until random playback is
initiated.
OKI Semiconductor
RESET (I)
AOUT (O)
BUSY (O)
RND (I)
Oscillation start
A2, A1
00
t
RA
t
W ( RAN )
Table 3.1 Random Address Setup Example
(Address = 0001)
Figure 3.3 Random Address Capture
Playback
Random address fixed time
A0, SW2-SW0
0001
0010
0011
0100
0101
1110
1111
t
RA
t
Random address fixed time
W ( RAN )
(Address = random)
Playback
MSM9802/03/05-xxx
Phrase
cloudy
snowy
snowy
sunny
sunny
rainy
rainy
FEDL9802-03-05-05
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