Program Memory 32Mbit Flash; Sram Memory; Eeprom Emulated In Flash Memory; Mcu Memory Requirements - Nokia NSB-5 Series Technical Documentation Manual

PAMS Technical Documentation
ble number of wait states for each memory range.

Program Memory 32MBit Flash

The MCU program code resides in the flash program memory.
The flash memory has a power down pin that shall be kept low, during the power up
phase of the flash to ensure that the device is powered up in the correct state (read
only). The power down pin is utilized in the system sleep mode by connecting
the VCXOPwr to the flash power down pin to minimize the flash power consumption
during the sleep.

SRAM Memory

The work memory size is 4Mbits (512kx8) static ram in a shrinked TSOP–32 package. Vcc
is 2.8V and access time is 85 ns 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 should be stored into the flash memory when the phone
is powered down.

EEPROM Emulated in FLASH Memory

A block in flash 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 flash. The flash size can vary between 2k to 8kbytes depending
on the amount of short code number locations supported. The memory is accessed
through the parallel bus.

MCU Memory Requirements

The MCU memory requirements are shown below.
Product Device
DCT3.5 FLASH
DCT3.5 FLASH
DCT3.5 SRAM

Flash Programming

The system connector can be used as a flash prom programming interface for flash mem-
ories for updating (i.e. re–programming) the flash program memory. Used system con-
nector pins and their functions are listed in Table 14.
To flash the phone use service battery (BBD–3) this will automatically power up the
phone via BTEMP. When flashing, the phone has to be initialized after each file has been
flashed. The flash prommer controls the power up of the phone via the service battery.
Issue 1 03/01
Table 13: HD955 memory requirements
Access
Organization Time
ns
2Mx16 100
1Mx16 100
512Kx8 85
Nokia Mobile Phones Ltd.
Wait
States Remarks
Used
1 32Mbit flash chip, 2.8V read/write
1 16Mbit flash chip, 2.8V read/write
1 120ns @ 2.8V read/write
NSB-5
System Module
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