Hi-Link HLK-LD2420 Manuel de l'utilisateur - Page 6

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3. Hardware Description

The picture below shows the front and back of the module. The module is equipped with 5 pin

holes (factory does not come with pins) called J2 for power supply and communication; J1 is the

SWD J1 is the SWD interface, which is used for MCU program burning and debugging.

J#PIN#

Name

J1Pin1

GND

J1Pin2

DIO

J1Pin3

CLK

J1Pin4

3V3

J#PIN#

Name

J2Pin1

3V3

J2Pin2

GND

J2Pin3

OT1

J2Pin4

J2Pin5

OT2

Note: J1, J2 interface pin spacing 2.54 mm.

HLK-LD2420

Front

Figure 3-1 Physical drawing of the front and back of the module

Table 3-1 J1 Pin Description

Function

Grounding

SWD Interface Data Cable

SWD Interface clock line

Power input

Table 3-2 J2 Pin Description

IO for reporting detection status: high for occupied,

low for unoccupied

第 4 页共 14 页

Function

Power input

Grounding

UART_RX

UART_TX

User Manuals

Reverse side

Description

0 ~ 3.3 V

3.0 V ~ 3.6 V，Typ.3.3V

Description

3.0 V ~ 3.6 V，Typ.3.3 V

0 ~ 3.3 V