USB-PMBus Adapter
1553-KEP 910 17 Uen Rev A
©
Ericsson AB 2011
9 (9)
3. Power up the design board. Note that the default I2Cspeed is set at 100 kHz
and the default pullups for PMBus data (SDA) and clock lines (SCL) are set at
2.2 k
Ω
.
Further instructions for troubleshooting:
If the design board cannot talk with the USB-PMBus adapter, first check to ensure
the 10-pin ribbon cable has been securely connected. If the ribbon cable has
been securely connected, check the PM-Bus communication speed and the pull-
ups for data (SDA) and clock (SCL) lines suitable for the application. If not, modify
the PMBus communication speed and the pull-ups accordingly. If this still does
not solve the problem, contact your local Ericsson representative.