Nokia RH-44 Series Troubleshooting - Bb page 8

RH-44
Troubleshooting — BB
password is checked, BSI is set back to "0". See the following figure.
Figure 2: Flashing starts by BSI being pulled up and password being sent to UEM
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. (See the following figure.)
Ch1-> PURX
Ch2-> MBUS toggled three times for MCU initialization
Ch3-> FBUS_TX low, MCU indicates that prommer has been noticed
Ch4-> FBUS_RX
Page 8
Figure 3: Flashing (2)
Nokia Corporation
CCS Technical Documentation
FLASH_1
Measure points
Production test pattern
(J396)
FLASH_2
Measure points
Production test pattern
(J396)
Confidential
CH1 = BSI
CH2 = MBUS
CH3 = FBUSTX
CH4 = FBUSRX
CH1 = PURX
CH2 = MBUS
CH3 = FBUSTX
CH4 = FBUSRX
Issue 1 04/2003