ADLINK Technology CoreModule 740 Reference Manual page 29

Chapter 3
Table 3-5. Utility 2 Interface Pin Signals (J4) (Continued)
56 ALE
57 GND22
58 IDE_PDDACK*
59 FDD_DATA*
60 GND4
61 GND23
62 IDE_IRQ14
63 FDD_HDSEL*
64 IOCS16*
65 GND24
66 IDE_PDA1
67 FDD_DSKCHG*
68 IDE_CABLID
69 NC
70 IDE_PDA0
71 NC
72 IDE_PDA2
73 NC
74 IDE_PDCS1*
75 NC
76 IDE_PDCS3*
77 NC
78 HDACT
79 NC
80 GND5
Note: The shaded areas denote power or ground. The signals marked with * indicate active low.
CoreModule 740
Address Latch Enable – This signal is used to latch the LA23 to LA17
signals or decodes of these signals. Addresses are latched on the falling
edge of BALE. It is forced high during DMA cycles. When used with
AENx, it indicates a valid processor or DMA address.
Floppy Ground
Primary DMA Channel Acknowledge – Used by the host to acknowledge
data has been accepted or data is available. Used in response to PDREQ
asserted.
Floppy Read Data – Raw serial bit stream from the drive for read
operations
IDE Ground
Floppy Ground
Primary Interrupt Request 14 – Asserted by drive when it has a pending
interrupt (PIO transfer of data to or from the drive to host.)
Floppy Head Select – Selects the side for Read/Write operations (0 = side
1, 1 = side 0)
I/O Chip Select 16 – This signal is driven low by an I/O slave device to
indicate it is capable of performing a 16-bit I/O data transfer. This signal
is driven from a decode of the SA15 to SA0 address lines.
Floppy Ground
Primary Disk Address 1 – Used to indicate which byte in the ATA
command block or control block is being accessed
Floppy Disk Change – Senses the drive door is open or the diskette has
been changed since the last drive selection
Cable ID – Used for slave and master negotiation and for 40 and 80 pin
IDE cable selection
Not Connected
Primary Disk Address 1 – Used to indicate which byte in the ATA
command block or control block is being accessed
Not Connected
Primary Disk Address 1 – Used to indicate which byte in the ATA
command block or control block is being accessed
Not Connected
Primary Chip Select Drive 1 – Used to select the host-accessible
Command Block Register for Drive 1
Not Connected
Primary Chip Select Drive 3 – Used to select the host-accessible
Command Block Register for Drive 3
Not Connected
Primary IDE Drive Activity LED – Used to drive an external IDE activity
LED, indicating drive activity
Not Connected
IDE Ground
Reference Manual
Hardware
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