The Adaptec®
AHA-8940 Host
Adapter and
Interface Cable
The Adaptec® AHA-8940 1394-to-PCI host adapter is a PC plug-in card1 capable of transferring data at up to 400 MBits/second. The adapter has one internal and two external 1394 ports. Each AHA-8940 represents one bus segment capable of supporting up to 63 nodes. If required, the AHA-8940 can supply 12V at up to 1.5A for IEEE 1394 devices that require power.The layout of the adapter is shown below.
12 VDC power connector
Internal IEEE 1394 connector
External
IEEE 1394 connectors
Figure 4-3. Layout of the Adaptec® AHA-8940 1394-to-PCI Host Adapter.
The interface cable supplied with the host adapter has two power wires and two signal twisted-pairs. A cross-section of the cable and the cable connector are shown in Figure 4-4.
1. In the future, IEEE 1394 will be a standard port on selected PCs.
Chapter 4 | IEEE 1394 Fundamentals and Interface Overview 61 |
