USB-206 v1.0
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3.4. Command response
Status below is returned as a response to the control command.
Status is composed of a combination of alphabets. The alphabets are arranged in
the priority order. The status ends with a newline (¥r¥n).
When the command is valid, the status after command execution is returned. When
it is invalid, the present status with [*] added at the beginning is returned.
Priority Response
Function
Description
1
*
Invalid Command
Send command is not valid.
2
A
Host Status
Device is connected to host A.
2
B
Host Status
Device is connected to host B.
2
X
Host Status
Device is not connected to any host.
3
L
Hold Status
The device is hold by the host.
4
C
Device Power Status
The device power is off.
4 V
Device
Power
Status
The device power is off because of the
over current.
Response Example
XC
: No host is connected and the device power is off.
A
: Host A is connected to the device and the device power is on.
BLC : Host B is holding the device and the device power is off.
XV
: No host is connected because of the over current.
*A
: Host A which is connected to the device sends command ‘G’. But the
command is invalid, because host A is already connected. And at the present,
host A is still connected.