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Controls, LEDs, and Connectors
Table 3-12 J5 Signal Descriptions (continued)
Signal
DA (2:0)
DCDn
DD (15:0)
DIOR_L
DIOW_L
DIR_L
DMACK_L
DMARQ
DRESET_L
DS (1:0)
DSKCHG_L
DSRn
DTRn
EIDE port (ATA-2), TTL Levels
ENETn_R-
ENETn_R+
ENETn_T-
ENETn_T+
Ethernet Ports 1 & 2:
Floppy Disk, TTL levels:
HDSEL_L
INDEX_L
INTRQ
IORDY
KBAUXVCC
KBDDAT
Keyboard/Auxiliary Device TTL:
MTR (1:0)
RDATA_L
RESET_L
Rin
RTSn
RXDn
Serial COM Ports (a & b), RS-232 levels:
SPKROC_L
STEP_L
66
CPCI-6020 CompactPCI Single Board Computer Installation and Use (6806800A51C)
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Description
Drive register and data port address lines.
Data carrier detected
Data lines
I/O read
I/O write
Controls the direction of the floppy head reader.
DMA acknowledge
DMA Request
Reset signal to drive
Select disk drives
Indicates drive door has been opened
Data set ready
Data terminal ready
Low side of differential receive data
High side of differential receive data
Low side of differential transmit data
High side of differential transmit data
Selects the top or bottom head
Indicates the beginning of track
Drive the interrupt request.
Indicates the drive ready for I/O
Fused power for the keyboard and auxiliary device.
Clock for the PC/AT or PS/2 keyboard
Enable/ Disable motor
Data read
Board hard reset output, TTL
Ring indicator
Request to send
Serial receive data
PC/AT Speaker output, open collector
Step head
CompactPCI User I/O Connector
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