Specifications

Rev. 1.43
User's Guide
19
2.12. I
2
C interface
The VSBC-6862 provides an I
2
C interface bus for on-board serial EEPROM accesses and user
purposes.
The board provides external accesses to this bus through an internal connector.
2.13. LED displays
The VSBC-6862 allows monitoring for a wide range of board activities, these status are available for
user check on the front panel.
The Power and Access LEDs functions are hardware fixed.
The Fast Ethernet LEDs can be reconfigured by setting the corresponding parameters in the
transceivers. The configuration of these LEDs is described in the Fast Ethernet transceiver
description.
The two Auxiliary LEDs are user defined with PowerQUICC II I/O ports. They are intended to provide
the user a flexible meaning to signal states on the front panel. These indicators have to be handled by
the user.
These two LEDs are active low.
The following table provides the relation between the front panel LED's and their corresponding
condition sources.
LED reference Source Ref Color
Power OK 5V power ok and 5V IP ok D1 Green
Access Internal logic (SDRAM, Reset, Slave) D5 Yellow
Auxiliary 0 MPC-8260 I/O port C24 P13 Yellow
Auxiliary 1 MPC-8260 I/O port C30 P13 Green
Fast Ethernet 1 Link SMSC-83C183 1, signal LED3 P12 Green
Fast Ethernet 1 Activity SMSC-83C183 1, signal LED2 P12 Yellow
Fast Ethernet 2 Link SMSC-83C183 2, signal LED3 P11 Green
Fast Ethernet 2 Activity SMSC-83C183 2, signal LED2 P11 Yellow
The 'Power' Led blinking can typically indicate a problem on an IP module. This LED indicates the
power state after the protecting fuses.
The 'Access' Led indicates:
- the Reset state
- an local access to SDRAM
- an slave access to the board
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