Casio CTK-691 Manual do Utilizador descarregar pdf (Página 41)

In the case of the WK-3500, 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.

The same packet is resent when a checksum mismatch or incompatible data structure error is detected.

Data Receiver Data Sender Operation

BDR → Send Request

← BSY Busy

(Send Canceled)

Data Receiver Data Sender Operation

BDS → Data Send

← BSY Busy

(Send Canceled)

Data Receiver Data Sender Operation

HDR → Send Request

← BSY Busy

(Send Canceled)

Data Receiver Data Sender Operation

HDS → Data Send

← BSY Busy

(Send Canceled)

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Casio CTK-691 Manual do Utilizador Página 41