20-668-0011 Rabbit Semiconductor, 20-668-0011 Datasheet - Page 297

• Manufacturer Part Number: 20-668-0011
• Description: IC MPU RABIT3000A 55.5MHZ128LQFP
• Manufacturer: Rabbit Semiconductor

Specifications of 20-668-0011

• Processor Type: Rabbit 3000 8-Bit
• Speed: 55.5MHz
• Voltage: 2.5V, 2.7V, 3V, 3.3V
• Mounting Type: Surface Mount
• Package / Case: 128-LQFP
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 55.5 MHz
• Operating Supply Voltage: 1.8 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 55 C
• Number Of Programmable I/os: 56
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 316-1061

In the case of write cycles, the chip select signals are active only around the trailing edge
of the write signal. Wait states are inserted between T1 and T2, and this will have no effect
on the duration of the chip select signals in this mode. The timing diagrams below illus-
trate the actual timing for the different divided cases. In these cases the chip selects are
active for two clock cycles before and two clock cycles after the trailing edge of the write
signal.
Appendix B Rabbit 3000 Revisions
Figure B-12. Short Chip Select Timing: perclk/8, Write Operation
Figure B-13. Short Chip Select Timing: perclk/6, Write Operation
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