Table of Contents
Advertisement
Circuit Description
2-2-2 ROM1 & SRAM
8M (X16) Flash ROM and 2M (X8) bit SRAM are used. Two devices are merged in one package. This device is a
combination memory organized as 524, 288 x 16 bit flash memory and 262, 144 x 8 bit static RAM in one
package.
2-2-3 ROM2
A 8M (X16) bit Flash Memory is used for the voice recognition and voice memory. This device is an 8, 388, 608
bit flash memory with batch chip erasing, sector erasing, and byte and word writing using a single 3V power
supply.
2-2-4 EEPROM
The kernel requires some external non-volatile memory to store various system parameters, such as RF control
calibrations, extra dial stores etc. A 64 K (65, 536) bit device is used. This device is internally organized 8192 x 8.
This device features a serial interface and software protocol allowing, operation on a simple, two wire bus.
2-3 SIM
2-3-1 SIM Interface
An interface is provided to a serial port controlling the SIM interface. It can support 5V and 3V SIM interface.
The hardware interface consists of SIMVCC, SIMdata I/O, SIMclk output, SIMRST output, and SIMPRES input.
The interface is controlled through TX Data, RX Data, control, and status registers. Transmit and receive data
may use a 256 byte buffer or be exchanged through single byte registers. SIMVCC may be used to control the
power supply to the SIM card.
Samsung Electronics
2-3
Advertisement
Chapters
Table of Contents
