User Guide

CCS Technical Documentation System Module
RH-25
Issue 1 10/2003 ©Nokia Corporation Confidential Page 25
Figure 18: Production/test/after market interface
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-25.
MBUS/CLK
GND
FBUS_RX FBUS_TX
VPP