ML22Q573 datasheet(28/69 Pages) ETC2

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FEDL22Q553-02

ML22Q553

Description of Command Functions

1. PUP command

command

WCM

The PUP command is used to shift the ML22Q553 from a power down state to a command waiting state.

The ML22Q553 can only accept the PUP command while it is in a power down state.

Therefore, in a power

down state, the device will ignore any other command if entered.

The ML22Q553 enters a power down state under any of the following conditions:

1) When power is turned on

2) At RESETB input

3) When CBUSYB go to a “H” level after inputting the power down command

CS B

Sta t u s

O sc illa t io n st a b ilize d

SC K

CB U S Y B

P o we r d o wn

XT XT B

Osc i ll a ti n g

O s c ill atio n s to pp ed

A w ait ing com m a n d

PU P

Res et bein g

pr oc es s ed

The WCM bit is used to set the two-time command input mode. When set to ”1”, the command input thereafter

will be processed in two-time command input mode and becomes valid only when the first data input matches

the second one.

WCM

Two-time command input mode

No (initial value)

Yes

The regulator starts operating after the PUP command is entered.

Any command will be ignored if entered

while oscillation is stabilized.

However, if a “L” level is input to the RESETB pin, the LSI enters a power

down state immediately.

Neither line output nor speaker output is enabled by the PUP command.

Power up the analog section by the

AMODE command.

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