Audio Codec; Ui Drivers; Ad Converters; Upp - Nokia RH-41 Series Technical Documentation Manual

RH-41
System Module
nections, DBUS (programmable clock) for DSP and CBUS (1.0MHz GSM and 1.08MHz
TDMA) for MCU. The UEM is a dual voltage circuit: the digital parts are run from 1.8V
and the analog parts are run from 2.78V. The Vbat (3,6V) voltage regulators's input is
also used.

Audio Codec

The baseband supports two external microphone input areas and one external earphone
output. The input can be taken from an internal microphone, a headset microphone or
from an external microphone signal source through a headset connector. The output for
the internal earpiece is a dual-ended type output, and the differential output is capable
of driving 4Vpp to the earpiece with a 60 dB minimum signal as the total distortion ratio.
The input and output signal source selection and gain control is performed inside the
UEM Asic, according to the control messages from the UPP.

UI Drivers

There is a single output driver for the buzzer, display, and keyboard LEDs inside the UEM.
These generate PWM square wave for the various devices.

AD Converters

The UEM is equipped with an 11-channel analog-to-digital converter. Some AD converter
channels (LS, KEYB1-2) are not used in RH-41. The AD converters are calibrated in the
production line.

UPP

Introduction

RH-41 uses the UPPv4M ASIC. The RAM size is 4M. The processor architecture consists of
both the DSP and the MCU processors.

Blocks

The UPP is internally partitioned into two main parts: (1) the Brain and (2) the Body.
1 The Processor and Memory System (that is, the Processor cores, Mega-cells,
internal memories, peripherals and external memory interface) is known as the
Brain.
The Brain consists of the following blocks: (1) the DSP Subsystem (DSPSS), (2) the
MCU Subsystem (MCUSS), (3) the emulation control EMUCtl, (4) the program/
data RAM PDRAM, and (5) the Brain Peripherals–subsystem (BrainPer).
2 The NMP custom cellular logic functions are known as the Body.
The Body contains interfaces and functions needed for interfacing other base-
band and RF parts. The body consists of, for example, the following sub-blocks:
(1) MFI, (2) SCU, (3) CTSI, (4) RxModem, (5) AccIF, (6) UIF, (7) Coder, (8) BodyIF,
and (9) PUP.
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CCS Technical Documentation
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