SCSI Apple PowerBook 30 pin

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Image:connector_apple_hdi-30.png 30 pin Apple HDI-30 connector at the Apple computer, looking into cable-side connector.

This connector is found on the SCSI Disk adapter cable.

Pin Name Dir Description Notes
1 SCSI-Mode SCSI disk mode enable signal Reserved for SCSI disk mode.
2 Data0 IN/OUT Data bit 0 Bit 0 of SCSI data bus
3 GND - Signal ground Ground
4 Data1 IN/OUT Data bit 1 Bit 1 of SCSI data bus
5 Termpwr +5 volts IN/OUT termination power Termination power
6 Data2 IN/OUT Data bit 2 Bit 2 of SCSI data bus
7 Data3 IN/OUT Data bit 3 Bit 3 of SCSI data bus
8 GND - Signal ground Ground
9 ACK IN Acknowledge Handshake signal. When low acknowledges a request for data transfer
10 GND - Signal ground Ground
11 Data4 IN/OUT Data bit 4 Bit 4 of SCSI data bus
12 GND - Signal ground Ground
13 GND - Signal ground Ground
14 Data5 IN/OUT Data bit 5 Bit 5 of SCSI data bus
15 GND - Signal ground Ground
16 Data6 IN/OUT Data bit 6 Bit 6 of SCSI data bus
17 GND - Signal ground Ground
18 Data7 IN/OUT Data bit 7 Bit 7 of SCSI data bus
19 PARITY IN/OUT Data parity SCSI data bus parity bit
20 GND - Signal ground Ground
21 REQ OUT Request Request for a data transfer
22 GND - Signal ground Ground
23 BUSY IN/OUT Busy When active (low) indicates that the SCSI data bus is busy
24 GND - Signal ground Ground
25 ATN IN Attention When active (low) indicates an attention condition
26 C/D OUT Control/data When active (low) indicates that data is on the SCSI bus. When high, indicates that control signals are on the bus
27 RST IN/OUT Reset SCSI bus reset
28 MSG OUT Message Indicates the message phase
29 SEL IN/OUT Select SCSI select
30 I/O OUT Input/output Controls the direction of data output. When high, data is input


Category:Buses Connectors


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