Nokia 9000i Service Manual page 53

After Sales
Technical Documentation
Table 29. External Signals and Connections, Inputs
Signal Name
PWM Charger on/off control
VCHAR Charging voltage
VOLTLIM Charging voltage limitation during call; affects HW voltage limit
Table 30. External Signals and Connections, Outputs
Signal Name
XRES Master reset
VL1 Logic supply voltage. Max 150 mA.
VL2 Logic supply voltage. Max 150 mA.
VA1 Analog supply voltage for AUDIO block. Max 40 mA.
VA2 Analog supply voltage for RFI. Max 80 mA.
VA3 Analog supply voltage for PHF power amplifier. Max 200 mA.
Reference voltage 4.65V #2%. Max. 5mA.
VREF
VBATDET Switched VBATT divided by 2
CHRDET Charger detect output
VCHARO Charging voltage to battery
VC Attenuated VCHAR
Block description
The PSL+ IC produces the following supply voltages:
In addition, it has internal watchdog, voltage detection and charger
detection functions. The watchdog will cut off output voltages if it is not
reset once in every 5 (+/–1?) seconds. The voltage detector resets the
phone if the battery voltage falls below 4.8 V (+/–0.2V). The charger
detection starts the phone if it is in power–off state when the charging
voltage is applied.
The charging electronics is controlled by the MCU. When the charging
voltage is applied to the phone and the phone is powered up, the MCU
detects it and starts controlling charging. If MCU detects too high charging
voltage (over 10 volts) or current (over 78 A/D bit difference between VC
and VBATDET) it will cut off the charging. The phone will accept charging
voltages from 5 to 13 volts.
Original, 08/96
Signal description
Signal description
VL1 150 mA for logic
VL2 150 mA for logic
VA1 40 mA for audios
VA2 80 mA for RFI
VA3 200 mA for PHF booster
VREF 5mA reference
RAE/RAK–1N
Baseband
(continued)
From
CTRLU
B2B conn
CTRLU
To
ASIC
CTRLU,
ASIC, RFI,
UIF
DSPU
AUDIO
RFI
AUDIO
CTRLU,RF
CTRLU
ASIC
Batt conn
CTRLU
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