Fat Unit B404
PCBS
SM 6-3 B404
ROM
• 3 MB (16 Mbit) flash ROM for system software storage
DRAM
• The 8 MB of DRAM is shared between SAF memory, ECM buffer, page
memory, working memory, line buffer, and so on.
• The SAF memory (2MB) is backed up by a rechargeable battery.
SRAM
• The 128 KB SRAM for system and user parameter storage is backed up by a
lithium battery.
Switches
Item Description
TB1 Used to specify the country setting for Europe/Asia (see NCU Europe/Asia)
TB3 Switches the DRAM backup battery on/off
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