Specifications

L70 Hardware Design
L70_HD_V1.0 - 14 -
3. Application interface
The module is equipped with an 18-pin 1.1mm pitch SMT pad that connects to the user application
platform. Sub-interfaces included in these pads are described in details in the following chapters.
3.1. Pin assignment of the module
2
3
4
5
7
8
RXD1
1
TXD1
9
6
17
16
15
14
12
11
18
10
13
V_BCKP
NC
VCC
VRESET
GND
RF_IN
GND
VCC_RF
ANTON
RESERVED
RESERVED
EXTINT0
TIMEPULSE
(Top View)
L70
NC
NC
GND
3.2. Pin description
Table 5: Pin description
Power Supply
PIN NAME
PIN
NO.
I/O
DESCRIPTION
DC
CHARACTERISTICS
COMMENT
VCC
8
I
Supply voltage
Vmax= 4.3V
Vmin=2.8V
Vnom=3.3V
Supply current of no less
than 150mA.
V_BCKP
6
I
Backup voltage
supply
Vmax=4.3V
Vmin=2.0V
Vnom=2.8V
I
BCKP
=7uA@Backup
mode
Power supply for RTC
domain when VCC does not
supply for the system.
VCC_RF
14
O
Output voltage RF
section
Vmax=4.3V
Vmin=2.8V
Vnom=3.3V
Imax=50mA
Usually supply for external
active antenna or LNA. If
unused, keep this pin open.
V
VCC_RF
≈ V
VCC
Reset
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