4. Electrical Characteristics
4.1. Limit Voltage Range
The limit voltage includes the absolute limit voltage and the operating limit voltage. The
absolute limit voltage is the maximum voltage that the module can bear, beyond which
the module may be damaged. The operating limit voltage is the normal operating voltage
range of the module, beyond which the module will have an abnormal performance.
4.1.1. Absolute Limit Voltage
The following table describes the absolute limit voltage ranges of FM101-NA-20 module.
Table 8. Absolute limit voltage range
Parameter Description
Minimum
Value (V)
Typical Value
Maximum
Value (V)
VBAT
Power supply
–0.3
3.8
5.25
GPIO
Digital IO level supply
voltage
–0.3
1.8
2.1
4.1.2. Recommended Operating Voltage
Table 9. Recommended operating voltage (signal)
Signal
Logical low level
Logical high level
Minimum
Value (V)
Maximum
Value (V)
Minimum
Value (V)
Maximum
Value (V)
Digital input
–0.3
0.36
0.7
×
VDD
VDD + 0.3
Digital output
0
0.45
VDD – 0.45
VDD
RESET_N
–0.3
0.5
1.25
1.89
PWRKEY
–0.3
0.5
1.25
1.89
4. Electrical Characteristics
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