Nokia 2160 Technical Documentation Manual

Also see for 2160: Owner's manual User guide

Contents

Nokia 2160 Technical Documentation Manual Manual pdf 6 page image

After SalesTechnical DocumentationDesktop Charger CHH–2Page – 6 Original 50/96Circuit DescriptionThe DC2 desktop charger module consists of microcomputer based con-trol logic for spare battery charging and discharging. It also has poweroutlet for transportable phone.Control LogicCharging is controlled by processor D150. It is a single–chip type control-ler incorporating RAM, ROM, A/D converter, and a multifunction timer/counter.Prosessor Input/Output SignalsName: Function:PA0 Phone LED control, green: ”1”PA1 Phone LED control, red: ”1”PA2 Spare battery LED control, green: ”1”PA3 Spare battery LED control, red: ”1”PA4/DBIN Discharge button input, ”0”: start dischargePA5/DISW Discharge control output, ”1”: discharge enabledPA6/BSW Spare battery charge control, ”0”: charge disabled,”1”: rapid charge, PWM: pulsed modePC7 Watchdog reset outputProcessor A/D InputsName: Function:AN0/VBATL Battery voltage• range: 0...11 V• resolution: 43 mV/bitAN1/VBATH High resolution battery voltage• range 7...11 V• resolution: 16 mV/bitAN2/PDET Phone current detect• PDET = ”1” for A/D value higher than 5• PDET = ”0” for A/D value 5 of or lessAN3/BTEMP Battery temperature, 27 kΩ pull–up resistor to+5 V reference voltageAN4/BSI Battery size, 100 kΩ pull–up resistor to +5 Vreference voltage