- Lepton
3
x1 - Lepton
3
x4 - Technical Information Manual
14
Pin #
Name
Direction
Function
1
GND
-
Ground
2
GND
-
Ground
3
VDC_IN
-
Supply voltage
4
VDC_IN
-
Supply voltage
5
GPIO0
IN/OUT
General purpose I/O #0
6
GPIO1
IN/OUT
General purpose I/O #1
7
GPIO2
IN/OUT
General purpose I/O #2
8
GPIO3
IN/OUT
General purpose I/O #3
9
RXD
IN
UART RX (input to the module)
10
TXD
OUT
UART TX (output from the module)
11
WKUP - RFU
IN/OUT
Reserved for future use
12
STATUS - RFU
IN/OUT
Reserved for future use
13
TST
IN
TST pin to be used for FW recovery/upgrade
14
nRST
IN
Active low reset. Connect to open drain driver.
15
BSL_SEL
IN
Boot Strap Loader interface enable signal
Tab. 3.1: Power supply and interface connector pin listing and signal definitions
Electrical Specifications
Absolute Maximum Ratings
The absolute maximum ratings (see
Tab. 3.2: Absolute Maximum Ratings
) define limitations for electrical
and thermal stresses. These limits prevent permanent damage to the R3101C Lepton
3
x1/R3104C
Lepton
3
x4.
Operation outside maximum ratings may result in permanent damage to the device.
Parameter
Min.
Max.
Unit
Conditions
Supply voltage
-0.3
5.5 V
VDC_IN pin relative to GND
IO voltage
-0.3
4.0 V
Non-VDC_IN pin voltages relative to GND
RF input power
-
+25 dBm
Incident to pin 1 (RF)
Storage temperature
-30
+100 ºC
Humidity
-
95 % RH
Non-condensing
ESD immunity
-
2 kV
Human-body model, all I/O pads
Tab. 3.2: Absolute Maximum Ratings
Operating Conditions
This section describes operating voltage, frequency, and temperature specifications for the R3101C
Lepton
3
x1/R3104C Lepton
3
x4 during operation.
Parameter
Min.
Max.
Unit
Conditions
Supply
3.2
5.25 V
VDC_IN relative to GND
Temperature
-20
+70 ºC
Ambient Temperature
Frequency
902
928 MHz
FCC part 15.247
865.6
867.6 MHz
ETSI EN 302 208 v3.3.1
Tab. 3.3: Operating Conditions
