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cPCI-MXS64 Technical Reference Manual
3.5.2.2.
SCSI Interface
Signal
Pin Assignation
SD 0-15
E7, D7, C7, B7, A7, E6,
D6, C6, E2, D2, C2, B2,
E8, D8, C8, B8
/IO
A3
/SREQ
B3
/CD
C3
/SSEL
D3
/SMSG
E3
/RST
A4
/ACK
B4
/BSY
C4
/SATN
E4
/WIDEPS
B5
TERMPWR
C5, D5
/SDPH, /SDPL
A8, B6
3.5.2.3.
Video Interface
Signal
Pin Assignation
SDATA
D9
SCLK
A10
HSYNC
B10
VSYNC
C10
RED
D10
GREEN
E10
BLUE
A11
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Description
SCSI Data – The SCSI data lines drive the ID during
arbitration and selection, and command and data
information as well as status and messages.
In/Out – Indicates the In direction when asserted and
the Out direction when not asserted.
Request – A target will assert REQ to indicate a byte is
ready or is needed by the Target.
Command/Data – Indicates Command or message
phase when asserted, and Data phase when not
asserted.
SCSI Select – The line is driven after a successful
arbitration to select as an initiator or reselect as a
target and otherwise it is received.
SCSI Message - Indicates a Message phase when
asserted, and Command or Data phase when not
asserted.
Reset – Signal is interpreted as a hard reset and will
clear all commands pending on the SCSI bus.
Acknowledge – Indicate a byte is ready for or was
received from the Target.
Busy – Handshake signal used during arbitration.
Attention – This line is activated when a special
condition occurs.
Wide Present – When Low, indicates that a wide (16-
bit) cable is present.
Termination Power.
SCSI High/Low Parity – Provide odd parity for data
lines.
Description
Video serial data line (video I2C)
Video serial clock line (video I2C)
Horizontal sync line
Vertical sync line
Analog Red video signal
Analog Green video signal
Analog Blue video signal
3-32
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