FEDL22594-06
ML22594-XXX
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Description of Command Functions
1. PUP command
command
0
0
0
0
0
0
0
WCM
The PUP command is used to shift the ML22594 from a power down state to a command waiting state.
The ML22594 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 ML22594 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
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
0
No (initial value)
1
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.
CSB
Status
Oscillation stabilized
SCK
SI
CBUSYB
Power down
XT
XTB
Oscillating
Oscillation stopped
Awaiting command
t
PUP
Reset being
processed
