Nokia RH-13 Series Troubleshooting Manual page 13

CCS Technical Documentation
•FBUSTX(serial data to phone),
•FBUSRX(serial data from phone),
•MBUS(serial clock for FBUSRX)
•VPP(External flashing voltage for speed up flashing)
• Also BSI line is used when initializing flashing (battery connector)
• When phone is powered (VBAT>3V ) MBUS and FBUSTX lines are pulled up inter-
nally by phone.
• Prommer sends command to UEM, using FBUSRX, to enter Flash-mode. During
the sending of this command prommer keeps BSI line high and MBUS is used as a
serial clock.
• When Flash-mode command is acknowledged UEM enters Flash-mode and
releases reset (PURX) to
• After reset is released UPP checks if there is a request for Bootstrap code (that
resides in UPP ROM).
• Request for Bootstrap is MBUS pulled down by Prommer. (If bootstrap is not
requested, bootstrap code jumps to FLASH SW.)
• If Bootstrap code is requested UPP enters Flash-mode and sets FbusTX to '0' as
acknowledgement to prommer. This is an indication that UPP can run, at least,
the fixed Bootstrap code – although not able to run FLASH code. UPP then sends
an UPP-ID to prommer via FBUSTX line.
• After prommer has received UPP-ID it sends corresponding Secondary Boot Code
to phone via FBUSRX. Secondary Boot Code, when run in UPP, requests UPP to
send information to prommer about flash type and other HW related parameters
about the device to be flashed.
• Prommer then sends the Algorithm Code corresponding to the HW parameters
and this algorithm, when run in UPP, takes over handling the MCUSW transfer to
Flash.
• 12 volts can be supplied to Vpp (by prommer) to speedup flashing.
• FLASH Program includes a package of MCU and DSP software and all default
parameters for the phone. The tuning values will be added/rewritten during
Flash/Alignment phase.
Issue 1 11/02
MCU.
ãNokia Corporation
RH-13
Troubleshooting
Page 13