Casio Personal Computer CTK-900 Manual De Usuario

42

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

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)