Flash Interface; Fbus Interface - Nokia RH-27 Series Technical Documentation Manual

RH-27
System Module

Flash Interface

Flash programming in production is done through the test pads in the above figure on
the PWB.

FBUS Interface

FBUS is an asynchronous data bus having separate TX and RX signals. Default bit rate of
the bus is 115.2 kbit/s. FBUS is mainly used for controlling and programming phone in
the production. This is the primary interface used in RH-27.
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Figure 17: Production/test/after market interface
© 2003 Nokia Corporation
CCS Technical Documentation
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Confidential Issue 1 11/2003