ml2216 Oki Semiconductor, ml2216 Datasheet - Page 27

• Manufacturer Part Number: ml2216
• Description: Oki Adpcm2 Algorithm-based Speech Synthesis Lsi
• Manufacturer: Oki Semiconductor

2. PUP2 Command
PUP2 command is used to take measures for the pop noise from the power down state and to shift the ML2216 to the
command standby state.
Since ML2216 receives either PUP1 or PUP2 command only in the power down state, it will ignore any other
command input.
The ML2216 enters into the power down state in any of the following 3 conditions:
The oscillation starts operation after PUP2 command input and, after an elapse of about 2 ms oscillation stabilization
time, the AOUT output gradually changes from GND level to 1V level in about 64 ms.
Regulator and speaker amplifier output start operation after PUP2 command input. However, SPP pin changes from
GND level to 1/2V
All commands that will be input during oscillation stabilization or while pop noise is being suppressed, are ignored.
However, if RESET is input, the ML2216 soon enters the power down state.
OKI Semiconductor
1) When the power is inserted.
2) At RESET input
3) When NCR and BUSY go “H” level after the power down command is input.
• command
DD
status
REGO
VBG·SG
AOUT
BUSY
XT·XT
NCR
SPM
level after reaching the level whose AOUT output is about 1V.
0
SCK
SPP
CS
DI
0
GND
Hi-Z
GND
GND
Stabilllizing Oscillation
Oscillation stopped
0
Power down
1
−
−
Pop noise
measures
−
Oscillating
−
1V
1/2VDD
1/2VDD
Command
standby
ML2216/ML22P16
FEDL2216FULL-03
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