20-668-0011 Rabbit Semiconductor, 20-668-0011 Datasheet - Page 211

• 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

25.1 Overview
The Rabbit 3000 contains several power-saving features. Since the power consumed by
the processor is proportional to the clock speed, the Rabbit 3000 provides 12 clock modes
that can go as low as 2 kHz. To further reduce power consumption in those ultra-sleepy
modes, various shortened chip select strobes are available to reduce current draw by the
attached memory devices.
Figure 25-1 shows a typical current draw as a function of the main clock frequency. The
values shown do not include any current consumed by external oscillators or memory. It is
assumed that approximately 30 pF is connected to each address line.
Chapter 25 Low-Power Operation
120
100
80
60
40
20
0
Figure 25-1. Rabbit 3000 System Current vs. Frequency at 3.3 V
0
10
25. L
20
Clock Frequency (MHz)
OW
30
-P
40
OWER
50
O
PERATION
60
xtal=25.80
xtal=14.74
xtal=11.05
xtal=3.68
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