Casio CTK-900 Midi Implementation Manual page 41

Data Receiver
HDR →
← HDS
HDA →
← HDS
HDJ →
The session can be canceled for any reason by sending an HDJ. The HDJ can be sent by the sending device or
the receiving device. The bulk dump session is terminated immediately upon receipt of an HDJ.
Data Receiver
HDR →
← HDS
HDA →
← HDS
:
:
HDJ →
Data Receiver
HDR →
HDA →
← HDS
HDA →
← HDS
:
:
← HDJ
In the case of the WK-3700, for example, when a communication request is received from an external source
while floppy disk control is being performed, BSY is returned to an external device that sends BDS, BDR, HDS,
HDR.
When the BSY is received, the receiver must wait until this Model enters a session-enabled mode, or use a
Prepare for Data Management parameter (see "20.2 Data Management Command List") to change to a
communication-enabled mode.
Data Receiver
BDR →
← BSY
Data Sender
Send Request (Optional)
(Send Canceled)
Data Sender
Send Request (Optional)
Data Receive Rejected
(Send Canceled)
Data Sender Operation
Send Request (Optional)
Acknowledge
Data Send
Acknowledge
Data Send
Data Send Rejected
(Send Canceled)
Data Sender
(Send Canceled)
Operation
Data Send
Acknowledge
Data Send
Rejection
Operation
Data Send
Acknowledge
Data Send
Operation
Send Request
Busy
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