Motorola CPCI-6020 Controls, LEDs, and ConnectorsCompactPCI User I/O Connector, Intrq, Resetl

Controls, LEDs, and ConnectorsCompactPCI User I/O Connector

Table 3-12 J5 Signal Descriptions (continued)

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