101-1279 Rabbit Semiconductor, 101-1279 Datasheet - Page 34

• Manufacturer Part Number: 101-1279
• Description: PLASTIC ENCLOSURE FOR BL4S100
• Manufacturer: Rabbit Semiconductor

Specifications of 101-1279

• Accessory Type: Enclosure
• Product: Prototyping Accessories
• Processor Type: BL4S100
• Board Size: 146 mm x 96 mm x 16 mm
• Interface Type: Ethernet
• For Use With/related Products: BL4S100
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Other names: 316-1159

3.7 Memory
3.7.1 SRAM
All BL4S100 boards have 512KB of battery-backed data SRAM, and 512KB–1MB of fast
program execution SRAM.
3.7.2 Flash Memory
BL4S100 boards have 1MB—2MB of serial flash memory.
Writing to arbitrary flash memory addresses at run time is also discouraged. Instead,
define a “user block” area to store persistent data. The functions
writeUserBlock()
and
are provided for this.
readUserBlock()
3.7.3 VBAT RAM Memory
The tamper detection feature of the Rabbit microprocessor can be used to detect any
attempt to enter the bootstrap mode. When such an attempt is detected, the VBAT RAM
memory in the Rabbit microprocessor is erased. The serial bootloader on the BL4S100
boards uses the bootstrap mode to load the SRAM, which erases the VBAT RAM memory
on any reset, and so it cannot be used for tamper detection.
BL4S100 User’s Manual
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