Functional Description; Bb Description; Memory Configuration; Energy Management - Nokia RH-47 Series Description

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Functional Description

BB description

The BB core is based on UPP_WD2 CPU, which is a PDA version of the DCT4 UPP ASIC.
UPP_WD2 takes care of all the signal processing and operation controlling tasks of the
phone as well as all PDA tasks.
For power management, there is one main ASIC for controlling charging and supplying
power UEM plus some discrete power supplies. The main reset for the system is gener-
ated by the UEM.
The interface to the RF and audio sections is also handled by the UEM. This ASIC provides
A/D and D/A conversion of the in-phase and quadrature receive and transmit signal
paths and also A/D and D/A conversions of received and transmitted audio signals. Data
transmission between the UEM and RF and the UPP_WD2 is implemented using different
serial connections (CBUS, DBUS, FBUS, MBUS and RFBUS). Digital speech processing is
handled by the UPP_WD2 ASIC.
A real time clock function is integrated into the UEM, which utilizes the same 32kHz-
clock source as the sleep clock. A rechargeable battery provides backup power to run the
RTC when the main battery is removed. Backup time is about 3 hours.

Memory configuration

RH-47 uses two kinds of memories: flash and SDRAM. These memories have their own
dedicated bus interfaces to UPP_WD2.
Synchronous DRAM is used as working memory. Interface is a 16-bit wide data and 14-
bit address. Memory clocking speed is 104 MHz. The SDRAM size is 128Mbits (8Mx16).
SDRAM I/O is 1.8 V and core 2.78 V, both are supplied by UEM regulator VIO. All memory
contents are lost, if the supply voltage is switched off.
Multiplexed flash memory interface is used to store the MCU program code and user
data. The memory interface is a burst type FLASH with multiplexed address/data bus,
running at 40MHz. Both Flash I/O and core voltage are 1.8 V supplied by UEM's VIO.

Energy management

The master of EM control is UEM and with SW this has the main control of the system
voltages and operating modes.

Modes of operation

RH-47 employs several hardware & SW controlled operation modes. The main modes are
described below.
• NO_SUPPLY mode means that the main battery is not present or its voltage is too
low (below UEM master reset threshold) and back-up battery voltage is too low.
• In BACK_UP mode, the main battery is not present or its voltage is too low but
Issue 1 05/04
Company Confidential
6 - Baseband Description and Troubleshooting
Copyright © 2004 Nokia Corporation
Company Confidential
RH-47
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