20-101-1256 Rabbit Semiconductor, 20-101-1256 Datasheet - Page 34

• Manufacturer Part Number: 20-101-1256
• Description: COMPUTER SINGLE-BOARD BL4S110
• Manufacturer: Rabbit Semiconductor

Specifications of 20-101-1256

• Module/board Type: Single Board Computer Module
• Product: Modules
• Processor Type: Rabbit 4000
• Sram: 512 KB
• Flash: 1 MB
• Timers: 8 bit, 10 bit
• Number Of I/os: 20
• Backup Battery: 3 V Lithium Coin Type
• Operating Voltage: 9 V to 36 V
• Board Size: 96 mm x 146 mm x 16 mm
• Description/function: Computer Module
• For Use With/related Products: BL4S110
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 316-1169

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
32