User Guide

The modem section consists of RAPGSM ASIC and NOR Flash and SDRAM memory as the core. NOR Flash and

SDRAM memories are in one package (Combo) RAPGSM supports cellular protocols of GSM (minimum EDGE

glass 10, GPRS phase2). Modem SDRAM memory has 256Mbits of memory and NOR flash has 512Mbits of

memory. RAPGSM operates with the system clock of 38.4 MHz, which comes from the VCTCXO.

Figure 69 RM-86 functional block diagram

Absolute maximum ratings

Signal Min Nom Max

Uni

Notes

Battery voltage (idle) -0.3 +4.5 V Battery voltage maximum value is

specified during charging is active

Battery voltage (Call) +4.3 V Battery voltage maximum value is

specified during charging is active

Charger input voltage -0.3 +16V V

Back-Up supply voltage 0 2.5 2.7 V Maximum capacity of the backup

power supply assumed to be 4 µAh.

Phone modes of operation

Mode Description

NO_SUPPLY (dead) mode means that the main battery is not present or its voltage is too low (below

RETU master reset threshold) and that the back-up battery voltage is too low.

BACK_UP The main battery is not present or its voltage is too low but back-up battery voltage is

adequate and the 32kHz oscillator is running (RTC is on).

RM-86

Nokia Customer Care System Module

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