Intel ISP4400 - Server Platform - 0 MB RAM, Product Manual

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Technical Reference 83
Universal Serial Bus (USB) Interface
The baseboard provides two stacked USB ports (Port 0 on top, Port 1 on bottom). The built-in
USB ports permit the direct connection of two USB peripherals without an external hub. If more
devices are required, an external hub can be connected to either of the built-in ports.
Table 12. USB Connector
Pin Signal
A1 Fused VCC (+5V /w overcurrent monitor of both port 0 and 1)
A2 DATAL0 (Differential data line paired with DATAH0)
A3 DATAH0 (Differential data line paired with DATAL0)
A4 GND
B1 Fused VCC (+5V /w overcurrent monitor of both port 0 and 1)
B2 DATAL1 (Differential data line paired with DATAH1)
B3 DATAH1 (Differential data line paired with DATAL1)
B4 GND
ICMB Connectors
The external Intelligent Management Bus (ICMB) provides external access to IMB devices that are
within the chassis. This makes it possible to externally access chassis management functions, alert
logs, post-mortem data, etc. It also provides a mechanism for chassis power control. Optionally,
the server can be configured with an ICMB adapter board. This board provides two SEMCONN
6-pin connectors to allow daisy chained cabling.
Table 13. ICMB Connectors
Pin Signal
1 NC
2 NC
3 B ( negative )
4 A (positive)
5 NC
6 NC