Specifications

Chapter 3 Hardware
34 Reference Manual LittleBoard 800
IDE Interface (J6, J7)
The LittleBoard 800 provides two IDE connectors for primary and secondary IDE signals.
The EIDE interface logic supports the following features:
• Bus master IDE transfer rate up to 100Mbps when 80-pin grounded shielded cable is used
• Increase 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.
• Single Bus Master EIDE
• Supports two IDE drives per interface (primary or secondary)
Tables 3-9 and 3-10 lists the signals for the two IDE 40 pin connectors, with 2 rows, odd/even, (1, 2),
0.100” pin spacing.
Table 3-9. Primary IDE Interface Pin/Signal Descriptions (J6)
Pin # Signal Description
1 RESET* Low active hardware reset (RSTDRV inverted)
2 GND Ground
3 PD7 Primary Disk Data 7 – These signals (0 to 15) provide the disk data signals.
4 PD8 Primary Disk Data 8 – These signals (0 to 15) provide the disk data signals.
5 PD6 Primary Disk Data 6 – These signals (0 to 15) provide the disk data signals.
6 PD9 Primary Disk Data 9 – These signals (0 to 15) provide the disk data signals.
7 PD5 Primary Disk Data 5 – These signals (0 to 15) provide the disk data signals.
8 PD10 Primary Disk Data 10 – These signals (0 to 15) provide the disk data signals.
9 PD4 Primary Disk Data 4 – These signals (0 to 15) provide the disk data signals.
10 PD11 Primary Disk Data 11 – These signals (0 to 15) provide the disk data signals.
11 PD3 Primary Disk Data 3 – These signals (0 to 15) provide the disk data signals.
12 PD12 Primary Disk Data 12 – These signals (0 to 15) provide the disk data signals.
13 PD2 Primary Disk Data 2 – These signals (0 to 15) provide the disk data signals.
14 PD13 Primary Disk Data 13 – These signals (0 to 15) provide the disk data signals.
15 PD1 Primary Disk Data 1 – These signals (0 to 15) provide the disk data signals.
16 PD14 Primary Disk Data 14 – These signals (0 to 15) provide the disk data signals.
17 PD0 Primary Disk Data 0 – These signals (0 to 15) provide the disk data signals.
18 PD15 Primary Disk Data 15 – These signals (0 to 15) provide the disk data signals.
19 GND 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 Ground