System Module Block Diagram; Baseband Functional Description - Nokia 6680 RM-36 Service Manual

RM-36
System Module
Baseband description

System module block diagram

The device consists of two different main modules: transceiver (1dw) and UI (1hv). The transceiver board consists
of baseband and RF components
The UI board consists of key domes and keypad backlights. Connection between the UI and the transceiver board
is established via a board-to-board spring connector.
Note: In this description, user interface HW covers display, camera, keyboard, keyboard backlight and
ALS.

Baseband functional description

Digital baseband consists of ISA based modem and SYMBIAN based application sections. Modem functionality
is in RAP3G and Helen2/3 acts as a platform for SYMBIAN applications.
Modem section consists of RAP3G ASIC with NOR FLASH and SDRAM memory as the core. RAP3G supports cellular
protocols of WCDMA (3GPP R-4) and GSM (minimum EDGE glass 10, GPRS phase2). Modem SDRAM memory have
64Mbits of memory and NOR flash have 64Mbits of memory. RAP3G operates with the system clock of 38.4 MHz,
which comes from the VCTCXO.
Application section includes Helen3 ASIC with DDR/NAND combo memory as the core. Stacked DDR/NAND
application memory has 256Mbits of DDR memory and 256Mbits of flash memory. Helen3 uses 19.2MHz clock,
which comes from the RAP3G divided by two from the 38.4 MHz system clock.
Issue 1
Figure 98 System level block diagram
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