Nokia RM-57 Service Manual page 334

RM-57/58
Nokia Customer Care System Module
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. OMAP uses 19.2MHz clock,
which comes from the RAP3G divided by two from the 38.4 MHz system clock.
Figure 93 Functional block diagram
OMAP processor (OMAP1710) is also called as an application ASIC because it is processing application SW and
handles the UI SW. It consists of OMAP3.3 and peripheral subsystems like camera, display and keyboard driver
blocks.
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