User Guide

PAMS
System Module DB6
NHB–3
Technical Documentation
Original 26/97
Page 4–11
Signal name Pin Notes
HOOK_RXD2 6 HOOK–indication. The phone has a 100k
pull–up resistor. Data to flash from flash
programmer.
PHFS_TXD2 7 Hands–free device power on/off. Data to flash
programming device.
VCHAR 8,16 Battery charging voltage.
EAR_HFPWR 10 External audio output to accessories or
handsfree speaker. 100kW pull–down in HP to
turn on the junction box.
DSYNC 11 DBUS–data bit sync clock.
RDA 12 DBUS received data from the accessories.
BENA 13 Power supply to headset adapter.
VF 14 Programming voltage for flash from Flash box.
DCLK 15 DBUS–data clock.
GND BGND Ground
TBAT BTEMP Battery temperature and vibrabattery control
BTYPE BTYPE Battery type
VBATT B+ Battery voltage
VCHAR DC+ Battery charging voltage
VCHAR CH+ Battery charging voltage
GND GND Charging ground, also phone ground
Internal Signals and Connections
Signals between RF and ASIC
Signal Name Function Notes
SCLK Synthesizer clock ASIC–>RF
SDATA Synthesizer data ASIC–>RF
SENA1 Synthesizer enable, UHF and ASIC–>RF
VHF PLL enable
RXPWR RX supply voltage ON/OFF ASIC–>RF
SYNTHPWR Synthesizer supply voltage ON/OFF ASIC–>RF
TXPWR TX supply voltage ON/OFF ASIC–>RF
TXP Transmitter power control enable ASIC–>RF