11
Chapter 3 Electrical
Power Supply
Do not input power until the engine is connected properly, otherwise the components inside the engine
might be damaged. Be sure the power is cut off before connecting or disconnecting the flexible flat cable.
Unstable power supply or sharp voltage drop might make the engine under unstable state. Wait at least
for 2s before supplying power again.
Ripple Noise
The ripple noise of power supply should be within 50mV (peak-to-peak), and 50mV is the limit.
DC Characteristics
Operating Voltage
(T=23°C)
Parameter
Symbol
Minimum
Typical
Maximum
Unit
Operating Voltage
VIN
（
TTL232
）
3.3
5.0
5.5
V
VIN
（
USB
）
4.5
5.0
5.5
V
Operating Current
(@ 5.0V)
Operating
Current
-
330
-
mA
Idle Current
-
60
-
mA
Low Power
-
1.2
-
mA
I/O Requirements
VDD=3.3V, VSS=0V, T=23°C
Parameter
Minimum
Maximum
Unit
VIL
VSS-0.1
VDD*0.2
V
VIH
VDD*0.8
VDD+0.1
V
VOL
VSS
VSS+0.3
V
VOH
VDD-0.3
VDD
V
