Ampro LittleBoard800 Reference Manual page 42

Chapter 3
Pin # Signal
10 SDD11
11 SDD3
12 SD12
13 SDD2
14 SDD13
15 SDD1
16 SDD14
17 SDD0
18 SDD15
19 GND
20 NC/Key
21 SDDREQ
22 GND
23 SDIOW*
24 GND
25 SDIOR*
26 GND
27 SIORDY
28 CSEL
29 SDACK*
30 GND
31 IRQ15
32 NC
33 SDA1
34 SPDIAG
35 SDA0
36 SDA2
37 SDCS1
36
Description
Secondary Disk Data 11 – These signals (0 to 15) provide the disk data signals.
Secondary Disk Data 3 – These signals (0 to 15) provide the disk data signals.
Secondary Disk Data 12 – These signals (0 to 15) provide the disk data signals.
Secondary Disk Data 2 – These signals (0 to 15) provide the disk data signals.
Secondary Disk Data 13 – These signals (0 to 15) provide the disk data signals.
Secondary Disk Data 1 – These signals (0 to 15) provide the disk data signals.
Secondary Disk Data 14 – These signals (0 to 15) provide the disk data signals.
Secondary Disk Data 0 – These signals (0 to 15) provide the disk data signals.
Secondary Disk Data 15 – These signals (0 to 15) provide the disk data signals.
Ground
Not Connected - Key pin plug
Secondary DMA Channel Request – Used for DMA transfers between host and
drive (direction of transfer controlled by DIOR* and DIOW*). Also used in an
asynchronous mode with DMACK*. Drive asserts IDRQ0 when ready to
transfer or receive data.
Ground
Secondary I/O Read/Write Strobe – Strobe signal for write functions. Negative
edge enables data from a register or data port of the drive onto the host data bus.
Positive edge latches data at the host.
Ground
Secondary I/O Read/Write Strobe – Strobe signal for read functions. Negative
edge enables data from a register or data port of the drive onto the host data bus.
Positive edge latches data at the host.
Ground
Secondary I/O Channel Ready – When negated extends the host transfer cycle
of any host register access when the drive is not ready to respond to a data
transfer request. High impedance if asserted.
Not connected
Secondary Cable Select – Used to configure IDE drives as device 0 or device 1
using a special cable
Ground
Interrupt Request 15 – Asserted by drive when it has pending interrupt (PIO
transfer of data to or from the drive to the host).
Not connected
Secondary IDE ATA Disk Address 1 – Used (0 to 2) to indicate which byte in
the ATA command block or control block is being accessed
UDMA 33/66 Sense – Senses which DMA mode to use for IDE devices.
Secondary IDE ATA Disk Address 0 – Used (0 to 2) to indicate which byte in
the ATA command block or control block is being accessed
Secondary IDE ATA Disk Address 2 – Used (0 to 2) to indicate which byte in
the ATA command block or control block is being accessed
Secondary Slave/Master Chip Select 1 – Used to select the host-accessible
Command Block Register.
Reference Manual
Hardware
LittleBoard 800