Cpu Memories; Power Supplies - LG B1300 Service Manual

Peripheral

2-6 CPU Memories

Flash ROM
An 32Mbit programmable ROM which is capable of being written to while still in circuit.
Contains all the main command software for the mobile.
SRAM
A 4MBit SRAM memory is embedded in the HERCROM20 which is used for ARM7 & DSP
execution

2-7 Power Supplies

There are six regulators in the Nausica_CS . Those regulators are dedicated power supplies,
which provides most of the power requirements for the Baseband and RF circuits.
Each of these regulators can be controlled by Nausica_CS internal registers.
These are configured as shown in the following Figure and table.
Regulator
Regulator 1 VR1
Regulator 1B VR1B
Regulator 2 VR2
Regulator 2B VR2B
Regulator 3 VR3
SIM Regulator
Voltage
1.8V+/-0.15
2.0V+/-0.2 Nausica_CS Internal logic
2.9V+/-0.1
2.85V+/-0.15
2.85V+/-0.15 Nausica _CS analog supply
3V+/-0.3
5V+/-0.5
Table1. – Power Supply
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Powers
Digital Core & RTC
Memory device
Peripheral
SIM Card
Permanent
Permanent
On/Off
Permanent
Permanent
On/Off
On/Off