ml2216 Oki Semiconductor, ml2216 Datasheet - Page 26

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

Command Function Descriptions
1. PUP1 Command
PUP1 command is used to shift the ML2216 from power down state to the command standby state.
In the power down state, since the ML2216 can receive either PUP1 or PUP2 command only, the device will ignore
any other input command.
The ML2216 enters into the power down state in any of the following 3 conditions:
The oscillation starts operation after PUP1 command input and, after an elapse of about 2 ms oscillation stabilization
time, the AOUT output abruptly changes from GND level to 1V level. Therefore, this abrupt change in AOUT
output will cause to generate the pop noise if the AOUT output is not processed outside. To suppress the pop noise,
input the PUP2 command.
Regulator and speaker amplifier output start operation after PUP1 command input. However, SPP pin changes from
GND level to 1/2V
All commands that will be input during oscillation stabilization are ignored,
However, if RESET is input, 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 inputting the power down command.
• command
DD
status
VBG·SG
REGO
XT·XT
AOUT
BUSY
NCR
SPM
SCK
SPP
level after an elapse of about 2 ms oscillation stabilization time.
0
CS
DI
0
GND
Hi-Z
GND
GND
Oscillation stopped
0
Power down
0
−
Stabilizing
oscillation
−
−
Oscillating
−
Command
1V
1/2VDD
1/2VDD
standby
ML2216/ML22P16
FEDL2216FULL-03
26/48