20-668-0011 Rabbit Semiconductor, 20-668-0011 Datasheet - Page 294

• 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

When operating from the 32 kHz oscillator, the same options are available, but the timing
is somewhat different. This is illustrated in the diagrams below for the four different cases.
In these case the chip selects are one clock cycle (of the 32 kHz clock) long.
284
Figure B-7. Short Chip Select Timing: 2 kHz, Read Operation
Figure B-8. Short Chip Select Timing: 4 kHz, Read Operation
Rabbit 3000 Microprocessor User’s Manual