External And Internal Signals And Connections; Dc (Charger) Connector; Service Connector; Battery Connector - Nokia NSB-6 Series Technical Documentation Manual

NSB–6
System Module

External and Internal Signals and Connections

This section describes the external electrical connection and interface lev-
els on the baseband. The electrical interface specifications are collected
into tables that covers a connector or a defined interface.

DC (charger) connector

DC (charger) connector is physically integrated in the same component
with the accessory interface connector. DC connector has both jack and
contact pads for desk stand.

Service connector

Name Parameter
MBUS Serial clock
from the
Prommer
FBUS_RX Serial data
from the
Prommer
FBUS_TX Data ac-
knowledge to
the Prommer
GND GND
The service connector is used as a flash programming interface for up-
dating (i.e. re–programming) 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 pro-
vided 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 bat-
tery 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
VBATT 3.0 3.9
BSI 0
68
22
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Min Typ Max
0 logic low 0.8
2.0 logic low 2.85
0 logic low 0.8
2.0 logic high 2.85
0 logic low 0.5
2.0 logic high 2.85
0
Max Unit
4.2 V
2.85 V
kohm
kohm Battery indication resistor (service battery)
E Nokia Mobile Phones Ltd.
PAMS Technical Documentation
Unit
V Prommer detection and Seri-
al Clock for synchronous
communication
V Receive Data from
Prommer to Baseband
V Transmit Data from Base-
band to Prommer
0 V
Notes
Battery voltage
Battery size indication
Phone has 100kohm pull up resistor.
SIM Card removal detection
(Treshold is 2.4V@VBB=2.8V)
Battery indication resistor (BLB–2)
Remark
Ground
Issue 1 06/2000