Nokia NSB-6 Series Technical Documentation Manual

Also see for NSB-6 Series: Disassembly & troubleshooting instructions

Nokia NSB-6 Series Technical Documentation Manual Manual pdf 10 page image

NSB–6System Module PAMS Technical DocumentationPage 10 Issue 1 06/2000 Nokia Mobile Phones Ltd.External and Internal Signals and ConnectionsThis section describes the external electrical connection and interface lev-els on the baseband. The electrical interface specifications are collectedinto tables that covers a connector or a defined interface.DC (charger) connectorDC (charger) connector is physically integrated in the same componentwith the accessory interface connector. DC connector has both jack andcontact pads for desk stand.Service connectorName Parameter Min Typ Max Unit RemarkMBUS Serial clockfrom thePrommer02.0logic lowlogic low0.82.85V Prommer detection and Seri-al Clock for synchronouscommunicationFBUS_RX Serial datafrom thePrommer02.0logic lowlogic high0.82.85V Receive Data fromPrommer to BasebandFBUS_TX Data ac-knowledge tothe Prommer02.0logic lowlogic high0.52.85V Transmit Data from Base-band to PrommerGND GND 0 0 V GroundThe service connector is used as a flash programming interface for up-dating (i.e. re–programming) the flash program memory and an electricalaccess 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 apulse given to the BTEMP line.Battery connectorThe 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 SIMcard before the power is lost if the battery is removed with power on. TheBSI contact disconnects earlier than the supply power contacts to giveenough time for the SIM and LCD shut down.Name Min Typ Max Unit NotesVBATT 3.0 3.9 4.2 V Battery voltageBSI 0 2.85 V Battery size indicationPhone has 100kohm pull up resistor.SIM Card removal detection(Treshold is 2.4V@VBB=2.8V)68 kohm Battery indication resistor (BLB–2)22 kohm Battery indication resistor (service battery)