User Guide

PAMS
Technical Documentation
NSB–1
System Module
Page 3 – 25
Original 06/98
SRAM Memory
The work memory size can vary depending on the product variation simi-
larly to the program memory. The work memory is a static ram of size
512kbits (64kx8). The work memory is supplied from the common base-
band VBB voltage and the memory contents are lost when the baseband
voltage is switched off. All retainable data is stored into the EEPROM
when the phone is powered down.
EEPROM Memory
An EEPROM is used for a nonvolatile data memory to store the tuning
parameters and phone setup information. The short code memory for
storing user defined information is also implemented in the EEPROM.
The EEPROM size is 8kbytes .The memory is accessed through a serial
bus and the default package is SO8S.
MCU Memory Map
MAD supports maximum of 4GB internal and 4MB external address
space. External memories use address lines MCUAd0 to MCUAd21 and
8–bit/16–bit data bus. The BUSC bus controller supports 8– and 16–bit
access for byte, double byte, word and double word data. Access wait
states (0, 1 or 2) and used data bus width can be selected separately for
each memory block.