Typewriter User Manual

MOTOROLA MC68340 USER’S MANUAL 10-13
10.3.2 MC68340V (3.3 V)
The MC68340V can operate with a 3.3-V power supply for significant power savings. The
formula for power dissipation is
P
d
≈ V
2
× f + dc
Table 10-2 shows typical electrical characteristics for both the MC68340 and MC68340V.
Table 10-2. Typical Electrical Characteristics
Parameter MC68340 (5.0 V) MC68340V (3.3 V)
Clock Frequency 0–16.78 MHz
0–25 MHz
0–8.39 MHz
0–16.78 MHz
Typical Current (16 MHz) 95 mA TBD
Typical Current (8 MHz) 55 mA 30 mA
Standby Current 60 µA 25 µA
Running at 3.3 V saves 66% of the power consumption.
The 3.3 V operation provides the following user advantages:
Advantage Benefit
Lower Supply Voltage Fewer Batteries
Fewer Batteries Less Weight
Smaller Size
Lower Current Drain Extended Battery Life
Less Heat Generated No Fan
No Fan Noise
Less EMF Radiation Easier FCC Certification
Less Crosstalk
Closer PCB Traces
High Functional Integration All-In-One 3.3 V Part:
Processor
Peripherals
Glue Logic
These advantages result in a much more portable system.
Frees
cale Semiconductor,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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