20-101-0356 Rabbit Semiconductor, 20-101-0356 Datasheet - Page 37

• Manufacturer Part Number: 20-101-0356
• Description: COMPUTER SINGLE-BOARD BL1800
• Manufacturer: Rabbit Semiconductor

Specifications of 20-101-0356

• Module/board Type: Single Board Computer Module
• Product: Modules
• Data Bus Width: 8 bit
• Processor Type: Rabbit 2000
• Sram: 128 KB
• Flash: 256 KB
• Timers: 8 bit, 10 bit
• Number Of I/os: 14
• Backup Battery: 3 V Lithium Coin Type
• Operating Voltage: 8 V to 40 V
• Power Consumption: 1.2 W
• Board Size: 89 mm x 64 mm x 19 mm
• Description/function: Computer Module
• For Use With/related Products: BL1800
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 316-1079

3.7 Memory
3.7.1 SRAM
The Jackrabbit is designed to accept 32K to 512K of SRAM packaged in an SOIC case.
Standard Jackrabbit models come with 128K of SRAM. A factory-installed option for 512K
of SRAM is available. Figure 14 shows the locations and the jumper settings for the jump-
ers at JP1 used to set the SRAM size. The “jumpers” are 0 Ω surface-mounted resistors.
No 0 Ω surface-mounted resistors are installed at JP1 for 32K SRAM.
3.7.2 Flash EPROM
The Jackrabbit is also designed to accept 128K to 512K of flash EPROM packaged in a
TSOP case.
A Flash Memory Bank Select jumper configuration option exists at JP3 with 0 Ω surface-
mounted resistors for Jackrabbit boards labeled 175-0255. This option, used in conjunc-
tion with some configuration macros, allows Dynamic C to compile two different co-resi-
dent programs for the upper and lower halves of the 256K flash in such a way that both
programs start at logical address 0000. This is useful for applications that require a resi-
dent download manager and a separate downloaded program. See Technical Note 218,
Implementing a Serial Download Manager for a 256K Flash, for details.
User’s Manual
NOTE: For ordering or other information involving the factory-installed 512K SRAM
NOTE: Rabbit recommends that any customer applications should not be constrained by
option, call your Rabbit sales representative or distributor.
the sector size of the flash memory since it may be necessary to change the sector size
in the future.
Figure 14. Jackrabbit Jumper Settings for SRAM Size
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