Flash Programming; Flashing Tool - Nokia 3155i Troubleshooting Manual

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Figure 2: Measured power-on sequence and timing Flash Programming

Flash Programming

Flashing Tool

Flash programming is done through the VPP, FBUSTX, FBUSRX, MBUS, and BSI signals
BSI = Used to indicate to MCU that the prommer is connected and mobile terminal is in
flashing mode
MBUS = Used as clock signal for synchronizing the serial communication between the
prommer and MCU
FBUSRX = Data to UPP
FBUSTX = Data to prommer
VPP = 0v/ 1.8v/ 12v (read only/normal op. or slow programming/fast programming)
ISSUE 1 07/2005
©2005 Nokia Corporation
3155/3155i (RM-41), 3152 (RM-61)
Baseband Description and Troubleshooting
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