Specifications

Chapter 4 Hardware Reference
34 Users Guide ReadyBox
IDE HDD (2 ½”) Interface
The ReadyBox provides one IDE cable assembly for a 2 ½” IDE hard disk drive (HDD) and one
CompactFlash slot for the CompactFlash socket on the ReadyBoard SBC.
The EIDE interface supports the following features:
• Standard 44-pin 2mm header
• Supports one 2 ½” IDE hard disk drive in the drive tray (shock mounts and hardware provided)
• No external power required (+5 volts provided at pins 41, 42)
Table 4-1 gives the signals for the IDE 44-pin, 2mm cable.
Table 4-1. Primary IDE Interface Pin/Signal Descriptions
Pin # Signal Description
1 RESET* Low active hardware reset (RSTDRV inverted)
2 GND Digital Ground
3 PDD7 Primary Disk Data 7 – These signals (0 to 15) provide the disk data signals.
4 PDD8 Primary Disk Data 8 – These signals (0 to 15) provide the disk data signals.
5 PDD6 Primary Disk Data 6 – These signals (0 to 15) provide the disk data signals.
6 PDD9 Primary Disk Data 9 – These signals (0 to 15) provide the disk data signals.
7 PDD5 Primary Disk Data 5 – These signals (0 to 15) provide the disk data signals.
8 PDD10 Primary Disk Data 10 – These signals (0 to 15) provide the disk data signals.
9 PDD4 Primary Disk Data 4 – These signals (0 to 15) provide the disk data signals.
10 PDD11 Primary Disk Data 11 – These signals (0 to 15) provide the disk data signals.
11 PDD3 Primary Disk Data 3 – These signals (0 to 15) provide the disk data signals.
12 PDD12 Primary Disk Data 12 – These signals (0 to 15) provide the disk data signals.
13 PDD2 Primary Disk Data 2 – These signals (0 to 15) provide the disk data signals.
14 PDD13 Primary Disk Data 13 – These signals (0 to 15) provide the disk data signals.
15 PDD1 Primary Disk Data 1 – These signals (0 to 15) provide the disk data signals.
16 PDD14 Primary Disk Data 14 – These signals (0 to 15) provide the disk data signals.
17 PDD0 Primary Disk Data 0 – These signals (0 to 15) provide the disk data signals.
18 PDD15 Primary Disk Data 15 – These signals (0 to 15) provide the disk data signals.
19 GND Digital Ground
20 NC-Key Not Connected - Key pin plug
21 PDDREQ Primary Device 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.
22 GND Digital Ground
23 PDIOW*
Primary Device 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.
24 GND Digital Ground