Nokia NSE–3 SERIES Service Manual

Contents

Nokia NSE–3 SERIES Service Manual Manual pdf 18 page image

PAMSTechnical DocumentationNSE–3System ModuleOriginal 11/97Page 3 – 12Bottom Connector External ContactsContact Line Symbol Function1 VIN Charger input voltageDC–jackside contact(DC–plug ring)L_GND Charger groundDC–jackcenter pinVIN Charger input voltageDC–jackside contact(DC–plug jacket)CHRG_CTRL Charger control output (from phone)2 CHRG_CTRL Charger control output (from phone)Microphoneacoustic portsAcoustic signal (to phone)3 XMIC Accessory microphone signal input (to phone)4 SGND Accessory signal ground5 XEAR Accessory earphone signal output (from phone)6 MBUS MBUS, bidirectional serial data i/o7 FBUS_RX FBUS, unidirectional serial data input (to phone)8 FBUS_TX FBUS, unidirectional serial data output (from phone)9 L_GND Charger groundBottom Connector SignalsPin Name Min Typ Max Unit Notes1,3 VIN 7.253.253207.63.63707.9516.93.95420VVVmAUnloaded ACP–7 Charger (5kohmsload)Peak output voltage (5kohms load)Loaded output voltage (10ohms load)Supply current7.13.257208.43.68009.33.95850VVmAUnloaded ACP–9 ChargerLoaded output voltage (10ohms load)Supply current2 L_GND 0 0 V Supply ground4,5 CHRG_ 0 0.5 V Charger control PWM lowCTRL 2.0 2.85 V Charger control PWM high32 Hz PWM frequency for a fast charger1 99 % PWM duty cycle6 MICP N/A see section Internal microphone7 MICN N/A see section Internal microphone