User Guide

Nokia Customer Care System Module

RH-37

Issue 1 07/04 Nokia Corporation Page 17

• Voltage reference for analogue blocks

• Charging function

• Baseband regulators

• RF regulators

• RF interface converters

External SRAM and Flash

The Combo-Memory is a multi chip package memory which combines 128 Mbit (8Mx16)

muxed burst multibank flash and 16 Mbit muxed CMOS PSRAM (Pseudo SRAM: DRAM

with SRAM interface).

The combo is supplied by single 1,8 V for read, write and erase operations. For acceler-

ated flash programming, Vpp = 9.0 V has to be applied to VPP input of the combo device.

The combo memory is housed in a 44-ball FBGA.

Figure 3: Combo memory

Energy management

The energy management of RH-37 is based on BB 4.0 architecture. A so-called semi fixed

battery (BL-5B) supplies power primarily to UEMEK ASIC and the RF PA. The UEMEK

includes several regulators to supply RF and Baseband. It provides energy management

including power up/down procedure.

Modes of operation

The baseband engine has six different functional modes: Since the UEMEK controls the

regulated power distribution; each of these states affects the general functionality of the

phone.

1 No supply

2nd

1st Chip