20-668-0003 Rabbit Semiconductor, 20-668-0003 Datasheet - Page 81

• Manufacturer Part Number: 20-668-0003
• Description: IC CPU RABBIT2000 30MHZ 100PQFP
• Manufacturer: Rabbit Semiconductor

Specifications of 20-668-0003

• Processor Type: Rabbit 2000 8-Bit
• Speed: 30MHz
• Voltage: 2.7V, 3V, 3.3V, 5V
• Mounting Type: Surface Mount
• Package / Case: 100-MQFP, 100-PQFP
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 30 MHz
• Operating Supply Voltage: 0 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Number Of Programmable I/os: 40
• Number Of Timers: 8 & 10 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 20-668-0003; 316-1062

When the clock doubler is used and there is no subsequent division of the clock, the output
clock will be asymmetric, as shown in Figure 7-2.
The doubled clock-low time is subject to wide (50%) variation since it depends on process
parameters, temperature, and voltage. The times given above are for a supply voltage of 5 V
and a temperature of 25°C. The doubled clock-low time increases by 20% when the voltage
is reduced to 4 V, and increases by about 40% when the voltage is reduced further to 3.3 V.
The values increase or decrease by 1% for each 5°C increase or decrease in temperature.
Chapter 7 Miscellaneous I/O Functions
Oscillator delayed
and inverted
Doubled clock
Example
Read
Cycle
Example
Write
Cycle
Oscillator
Delay
Time
Address, /CS
Early write pulse
option
Address, /CS
Early output enb
option
Write pulse
Output enb
Data out
Figure 7-2. Effect of Clock Doubler
0.48P
48%
P
52%
0.52P
0.48P
0.52P
Valid data out from mem
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