Flashing - Nokia RH-27 Series Technical Documentation Manual

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RH-27

Troubleshooting - Baseband

note a falling edge is required to load the compare register.

Flashing

Flash programming is done through VPP, FBUSTX, FBUSRX, MBUS. and BSI signals.

When phone has entered to flash programming mode, prommer will indicate to UEM

that flash programming will take place by writing 8-bit password to UEM. Prommer will

first set BSI to "1" and then uses FBUSRX for writing and MBUS for clocking. After that

BSI is set back to "0".

MCU will indicate to prommer that it has been noticed, by using FBUSTX signal. After

this it reports UPP type ID and is ready to receive secondary boot code to its internal

SRAM.

This boot code asks MCU to report prommer phone's configuration information, includ-

ing flash device type. Now the prommer can select and send algorithm code to MCU

SRAM (and SRAM/Flash self-tests can be executed)

Page 16

Figure 1: Flashing start

CCS Technical Documentation

FLASH_1

CH1 = BSI

CH2 = MBUS

CH3 = FBUSTX

CH4 = FBUSRX

Measure points

Production test pattern

(J396)

Confidential

Issue 1 11/2003

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