Internal Signals And Connections - Nokia 9000i Service Manual

After Sales
Technical Documentation

Internal Signals and Connections

Table 13. Signals Between PROCU and power supply unit
Signal Name
LCDPWM
LCDVCCON
LCDVEEON
PWRGOOD
VBACK
5VPDX
Original, 08/96
Function
PWM signal for LCD voltage control
LCD Vcc on/off
LCD Vee on/off
Reset signal for CPU
Backup battery voltage to RTC
5V regulator powerdown
RAE/RAK–1N
PDA Hardware
Notes
LCD contrast control
VSYS valid
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