2 SERIAL COMMUNICATION MODULE REPLACEMENT
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(b) When using dedicated instruction (PRN/INPUT)
Transmission processing
Specifies the module's head I/O
signal.
Specifies a device by which
execution completion can be
checked.
Specifies No. of send data.
Specifies send data.
(Instruction execution)
(Instruction execution)
(Flag control at transmission
completion)
Specifies allowable No. of receive
data.
Reception processing
Specifies the module's head I/O
signal.
Specifies allowable No. of receive
data.
Specifies a head device from
which receive data are stored.
Specifies a device by which
execution completion can be
checked.
(Flag control at reception
completion)
Send
enable
flag
Send
request
Module
ready
signal
Transmis-
sion com-
plete
Receive
data read
Send completion
check flag
Transmission
complete
Receive completion
check flag
Receive
complete
Reception normal
complete flag
Reception
complete
Receive
data
Allowable No. of
receive data
Allowable No. of
receive data
Transmission normal
complete flag
Transmission normal
complete flag
Send
data
Transmission
complete
Reception normal
complete flag