20-668-0024 Rabbit Semiconductor, 20-668-0024 Datasheet - Page 347

• Manufacturer Part Number: 20-668-0024
• Description: IC CPU RABBIT4000 128-LQFP
• Manufacturer: Rabbit Semiconductor

Specifications of 20-668-0024

• Processor Type: Rabbit 4000 8-bit
• Speed: 60MHz
• Voltage: 2.5V, 2.7V, 3V, 3.3V
• Mounting Type: Surface Mount
• Package / Case: 128-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Other names: 20-668-0022; 316-1078

Appendix B Rabbit 4000 ESD Design Guidelines and Bug Workarounds
The simplest workaround is to not use the instructions listed above. The same operation
can be handled by the following code sequence.
This code sequence will take more clocks to execute.
Another way to avoid the bug is to increase the number of wait states, if possible, on
the device operating in the basic mode. Using this option will produce a loss of
performance.
Finally, this bug is best avoided by not using the basic 16-bit mode unless absolutely
necessary. It is highly likely that any SRAM device that you are executing code in will
support the advanced 16-bit mode with byte-writes enabled, which will also improve
the overall performance as a result of the 16-bit data fetches.
PUSH HL
RET
; or IX or IY
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