User Guide

NHB–3
Technical Documentation
PAMS
HF Desktop Charger CHH–8P
Original 26/97 Page 15
Port D Signals of the Processor
Port D: Function:
PD0: PHONE MIC (out) Analog switch, ”1”: phone mic switched on
PD1: ACC MIC (out) Analog switch, ”1”: accessory mic switched on
PD2: HF MIC (out) Analog switch, ”1”: HF mic swithed on
PD3: PHONE EAR (out) Analog switch, ”1”: phone ear swithed on
PD4: ACC EAR (out) Analog switch, ”1”: accessory ear swithed on
PD5: HF SPK (out) Analog switch, ”1”: HF speaker swithed on
PD6: Unused NC
PD7: Unused NC
Port F Signals of the Processor
Not used.
Processor A/D Inputs
Name: Function:
AN0: VBATL Battery voltage
• range: 0...11 V
• resolution 43 mV/bit
AN1: VBATH High resolution battery voltage
• range: 7.0...11 V
• resolution 16 mV/bit
AN2: PHOCURDET Phone current detect
• PDET = ”1” for A/D value higher than 5
• PDET = ”0” for A/D value or less
AN3: BATTEMP Battery temperature, 27 kΩ pull–up resistor to
+5 V reference supply
AN4: BATTSZ Battery size, 100 kΩ pull–up resistor to +5 V
reference supply
AN5: CHRGVOLT Charger voltage detection
AN6: PWR Phone connection detection
AN7: LIREF Lithium battery detection