Nokia NSB-7 Series, Руководство по обслуживанию

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PAMS Technical Documentation System Module
NSB-7
Issue 1 06/00 ã Nokia Mobile Phones Ltd. Page 11
sory interface connector. DC connector has both jack and contact pads for desk stand.
Service Connector
The service connector is used as a flash programming interface for updating (i.e. re-pro-
gramming) the flash program memory and an electrical access for services to the engine.
When the flash prommer is connected to the phone supply power is provided through the
battery contacts and the phone is powered up with a pulse given to the BTEMP line
.
Battery connector
The BSI contact on the battery connector is used to detect when the battery is to be
removed to be able to shut down the operations of the SIM card before the power is lost
if the battery is removed with power on. The BSI contact disconnects earlier than the
supply power contacts to give enough time for the SIM and LCD shut down.
Name Min Typ Max Unit Notes
VIN 0 12 V
0 850 mA
L_GND 0 0.3 V
Name Parameter Min Typ Max Unit Remark
MBUS Serial clock from
the Prommer 0
2.0 logic low
logic low 0.8
2.85 V Prommer detection and Serial
Clock for synchronous communi-
cation
FBUS_RX Serial data from the
Prommer 0
2.0 logic low
logic high 0.8
2.85 V Receive Data from Prommer to
Baseband
FBUS_TX Data acknowledge
to the Prommer 0
2.0 logic low
logic high 0.5
2.85 V Transmit Data from Baseband to
Prommer
GND GND 0 0 V Ground
Name Min Typ Max Unit Notes
VBATT 3.0 3.9 4.2 V Battery voltage
BSI 0 2.85 V Battery size indication
Phone has 100kohm pull-up resistor.
SIM Card removal detection
(Threshold is 2.4V@VBB=2.8V)
68 kohm Battery indication resistor (BLB-2)
kohm Battery indication resistor (service battery)