Chapter 3 Hardware
CoreModule 420 Reference Manual 27
IDE Interface (J6)
The IDE device signals are provided through the standard 44-pin, 2mm connector (J6).
The IDE interface supports the following features:
•Master mode PCI supporting Enhanced IDE devices
•Supports two EIDE devices
•Full scatter-gather capability
•Supports ATAPI compliant devices including DVD
•Supports IDE native and ATA compatibility modes
Table 3-9 gives the signals for the 44-pins of the IDE 2mm header.
Table 3-9. IDE Interface Pin/Signal Descriptions (J6)
Pin # Signal Description
1 RESET* Low active hardware reset (RSTDRV inverted)
2GND Digital Ground
3 D7 Disk Data 7– These pins (0 to 15) provide disk data.
4 D8 Disk Data 8 – Refer to pin 3, D7, for more information.
5 D6 Disk Data 6– Refer to pin 3, D7, for more information.
6 D9 Disk Data 9 – Refer to pin 3, D7, for more information.
7 D5 Disk Data 5– Refer to pin 3, D7, for more information.
8 D10 Disk Data 10– Refer to pin 3, D7, for more information.
9 D4 Disk Data 4 – Refer to pin 3, D7, for more information.
10 D11 Disk Data 11 – Refer to pin 3, D7, for more information.
11 D3 Disk Data 3 – Refer to pin 3, D7, for more information.
12 D12 Disk Data 12 – Refer to pin 3, D7, for more information.
13 D2 Disk Data 2 – Refer to pin 3, D7, for more information.
14 D13 Disk Data 13 – Refer to pin 3, D7, for more information.
15 D1 Disk Data 1 – Refer to pin 3, D7, for more information.
16 D14 Disk Data 14– Refer to pin 3, D7, for more information.
17 D0 Disk Data 0 – Refer to pin 3, D7, for more information.
18 D15 Disk Data 15 – Refer to pin 3, D7, for more information.
19 GND Digital Ground
20 Key/GND Key pin plug/Ground
21 PDRQ DMA Request – Used for DMA transfers between host and drive (direction of
transfer controlled by PIOR* and PIOW*). Also used in an asynchronous mode
with PDACK*. Drive asserts PIRQ when ready to transfer or receive data.
22 GND Digital Ground
23 PIOW* Drive I/O Write – 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