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General| Brand | Nokia |
|---|---|
| Model | RH-18 |
| Category | Cell Phone |
| Language | English |
Specifies environmental conditions for normal operation and storage.
Introduces the baseband module, its chipset, UI, and acoustical parts.
Summarizes the baseband module's main ASICs (UEM, UPP) and Flash IC.
Details the mode where the phone has no supply voltage due to battery issues.
Describes the state when the phone is powered off but supplied, with VRTC active.
Explains the state when the phone powers on for charging but RF parts are off.
Details normal operation, channel scanning, and data processing.
Describes the low-power standby mode controlled by MCU and DSP.
Explains the battery charging process and control circuitry.
Lists normal and extreme voltage ranges for the battery.
Details voltage ranges for various regulators (BB and RF).
Describes the battery connector and its terminals for voltage, ground, and size identification.
Details internal microphone and speaker signal characteristics.
Lists board clocks, their sources, destinations, and active conditions.
Describes external audio accessory connection via the system connector.
Details the internal earpiece and its acoustic design.
Explains components of the earpiece circuit, including impedance and filtering.
Describes the omni-directional microphone and its connection.
Explains the flashlight feature and its nominal current at different temperatures.
Describes the black and white LCD module, its resolution, and interface.
Describes the FBUS interface for controlling the phone during flashing.
Describes the MBUS interface for service and control between phone and PC.
Details the signal path from the antenna to the baseband for RX.
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