User Guide

NMM-3 Company Confidential
7 - System Module & UI CCS Technical Documentation
Page 7-6 Copyright  2003 Nokia Corporation Issue 1 (11/2003)
Company Confidential
• An extra regulator for Tomahawk so saving small area and cost needed for an
external regulator.
• Stereo audio support for stereo tomahawk accessories, which is necessary for the
Music Player.
• Wider audio bandwidth that can be used to improve audio quality of MP3/AAC
and ring tones.
Baseband power is supplied from a 2.8V analogue voltage and 1.8V I/O voltage. UEME
includes 8 linear LDO (Low Drop-Out) regulators for Baseband and 7 regulators for RF. It
also contains 4 current sources for biasing purposes, two for internal use. UEME also
includes a SIM interface, which supports 1.8V and 3V SIM cards. Note: 5V SIM cards are
no longer supported by DCT-4 generation Baseband.
A real time clock function is integrated into UEME, which utilizes the same 32KHz clock
supply as the sleep clock. A backup power supply is provided for the RTC-battery, which
keeps the real time clock running when the main battery is removed. A 10µAh capacitor
provides RTC backup for 3 hours minimum.
The TIKU Brain consists of 5 sections: - the ARM925 Mega-Module, (consisting of the
ARM9 MCU, Cache memory, Parallel LCD Controller, and Traffic Controller), C-DSP Lead 3
Mega-Module, D-DSP Lead 3 Mega-Module, PDRAM, and PDA Peripherals.
The ARM-Mega-Module has a Traffic controller, which provides the interface between
the MCU, external memories, LCD controller, and internal busses. It also processes the
data packages for burst mode memory access.
The PDA Peripherals consists of Camera Compact Port (CCP) interface, IR, USB, and Dis-
play interfaces.
The DPLL frequencies are currently:
• MCU: 124.8MHz
• DSPs: 148.0MHz
• PDA: 48MHz
NMM-3 will use TIKU version 1.23
NMM-3 uses a discrete LM2608-1.3 SMPS 1.5V/1.3V regulator for TIKU core supply.
The UEME ASIC handles part of the interface between the baseband and the RF section.
The GSM RX path goes via ADCs in UEME intended for the purpose, but the GSM TX path
uses the dual purpose DACs on board the Tiku baseband ASIC. Tiku DACs are used for
both GSM and WCDMA TX paths. The WCDMA RX path is via Tiku ADCs. UEME also pro-
vides the RF section with a DAC for AFC control, a simple "Is RF present?" level detector
TXPWRDET, a DAC for TXC WCDMA power control, two reference voltages VREF01 and
VREF02, and a 4-bit controlled current output IPA1 used for WCDMA PA bias control.
IPA2 is not used. UEME is controlled by Tiku using two serial buses CBUS and DBUS.
CBUS mostly carries commands from the MCU and DBUS mostly carries commands from
the DSP. UEME also contains the analogue parts of the audio codecs which are capable