Specifications

Chapter 3 Hardware
ReadyBoard 700 Reference Manual 33
IDE Interface (J22)
The ReadyBoard 700 provides one IDE connector (J22) for two IDE devices on the primary IDE
controller and one CompactFlash socket (J23) on the secondary IDE controller.
The EIDE interface logic supports the following features:
• Transfer rate up to 100Mbps
• Increased reliability using Ultra DMA 33/66/100 transfer protocols
• Full scatter-gather capability
• Supports ATAPI and DVD compliant devices
• PIO IDE transfers as fast as 14Mbps.
• Bus master IDE transfers as fast as 66Mbps.
• Single Bus Master EIDE
• Supports two IDE drives on primary interface and one CompactFlash card on the secondary
Table 3-9 list the signals for the IDE 44-pin, 2mm header.
Table 3-9. Primary IDE Interface Pin/Signal Descriptions (J22)
Pin # Signal Description
1 RESET* 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.