Sony GY-8240UWD Maintenance Manual page 23

SCSI BUS SIGNAL LINES
Host computer
The bus driver of this unit is differential type.
The data bus supports 16 bits.
SIGNAL LINE INFORMATION
BSY Indicates that the SCSI bus is being used.
SEL Initiator selects the target in selection phase and the target selects the initiator in reselection
phase.
RST Requires to reset all the devices connected to the SCSI bus.
However, this signal is not turned on in this unit.
C/D Identifies information. (1: Control information* / 0: Data information.)
Determines the direction of transmission. (1: Initiator → Target / 0: Target → Initiator)
I/O
MSG The target drives this signal. (1: Message information / 0: Command status data information.)
REQ The target drives this signal. This signal is used for handshake of data transmission.
ACK The initiator drives this signal. This signal is used for handshake of data transmission.
ATN The initiator drives this signal. This signal indicates that a message is required by the initiator.
* : The control information is the command, status or message information.
GY-8240UWD
GY-8240FC
Data bus (bit 0-15, parity P-P1)
Busy (BSY)
Select (SEL)
Reset (RST)
Control/Data (C/D)
Input/Output (I/O)
Message (MSG)
Request (REQ)
Acknowledge (ACK)
Attention (ATN)
1-5. Connector/Cable Information
GY-8240UWD
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