R211, Vpp, Wintesla Self Test, Mcu Eeprom Interface; Testing - Nokia NSB-6 Series Disassembly & Troubleshooting Instructions

NSB–6
Disassembly & Troubleshooting Instructions

R211, VPP, WinTesla Self Test, MCU Eeprom interface

Testing

The MCU software enters a local mode at start–up if suitable resistors are
connected to the BTEMP and BSI lines.
NOTE! Baseband doesn't wake up automatically when the battery voltage
is connected. Power must be switched on by
In the local mode the baseband can be controlled through MBUS or
FBUS connections by a PC–locals software. Baseband internal connec-
tions are tested with selftests if possible.
Parameters cannot be set accurate enough by design because of compo-
nent tolerances. Due to use of 5% resistor values, the channels of the
CCONT A/D converters need to be aligned in the production phase. With-
in battery voltage tuning the MCU software reads the A/D reading from
CCONT at 4.1V and stores this reading to emulated EEPROM memory as
a reference point. Another reference point is created by assuming that
while the input voltage is zero, A/D reading is also zero. Now the slope is
known and A/D readings can be calibrated. Calibration is included in
VBATT A/D reading task.
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pressing the Power key or
inserting a waking pulse BTEMP line or
connecting a charger
E Nokia Mobile Phones Ltd.
PAMS Technical Documentation
Issue 1 06/2000