Ampro Corporation Littleboard 550 manual IDE Interface J12, J17, Pin # Signal Description

Chapter 3 Hardware

IDE Interface (J12, J17)

The LittleBoard 550 provides two IDE connectors for primary and secondary IDE signals. The EIDE interface logic supports the following features:

•Transfer rate up to 100Mbps

•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.

•Bus master IDE transfers as fast as 100Mbps.

•Single Bus Master EIDE

•Supports two IDE drives per interface channel (primary or secondary connector) Table 3-9 gives the signals for the IDE 40-pin, 0.100” header.

Table 3-9. Primary IDE Interface Pin/Signal Descriptions (J12)

Pin #	Signal	Description
1	IDERST*	IDE Reset – Low active hardware reset (RSTDRV inverted)
2	GND	Ground
3	PDD7	Primary Disk Data 7 – These signals (D0-D15) carry the Data, Commands, and
		Status between the host and the controller. D0 is the LSB of the even Byte of the
		Word. D8 is the LSB of the Odd Byte of the Word. All Task File operations
		occur in byte mode on the low order bus D0-D7, while all data transfers are 16
		bit using D0-D15 to provide the disk data signals.
4	PDD8	Primary Disk Data 8 – Refer to PDD7 on pin-2 for more information.
5	PDD6	Primary Disk Data 6 – Refer to PDD7on pin-2 for more information.
6	PDD9	Primary Disk Data 9 – Refer to PDD7on pin-2 for more information.
7	PDD5	Primary Disk Data 5 – Refer to PDD7on pin-2 for more information.
8	PDD10	Primary Disk Data 10 – Refer to PDD7 on pin-2 for more information.
9	PDD4	Primary Disk Data 4 – Refer to PDD7 on pin-2 for more information.
10	PDD11	Primary Disk Data 11 – Refer to PDD7 on pin-2 for more information.
11	PDD3	Primary Disk Data 3 – Refer to PDD7 on pin-2 for more information.
12	PDD12	Primary Disk Data 12 – Refer to PDD7 on pin-2 for more information.
13	PDD2	Primary Disk Data 2 – Refer to PDD7 on pin-2 for more information.
14	PDD13	Primary Disk Data 13 – Refer to PDD7 on pin-2 for more information.
15	PDD1	Primary Disk Data 1 – Refer to PDD7 on pin-2 for more information.
16	PDD14	Primary Disk Data 14 – Refer to PDD7 on pin-2 for more information.
17	PDD0	Primary Disk Data 0 – Refer to PDD7 on pin-2 for more information.
18	PDD15	Primary Disk Data 15 – Refer to PDD7 on pin-2 for more information.
19	GND	Ground
20	NC/Key	Not connected / Key pin plug

LittleBoard 550 Reference Manual 35