Hi-Link HLK-7628D - 4.2. Default pin function (serial passthrough firmware)

Shenzhen Hi-Link Electronic Co., Ltd. Manual
page 8 / 15
HLK-7628D
4.2. Default pin function (serial passthrough firmware)
No.
Network name
Type
Function Description
Default features
1
PORST_N
I/O
Module reset (restart), active low
Can't be used to restore the default
settings, hang up without using
2
PERST_N
I/O
PCIe device reset output
Undefined, please hang up, cannot be
pulled up and down
3
REF_CLK0
I/O
Reference clock output
Undefined, please hang up
4
WDT_RST_N
I/O
Watchdog timeout reset
Pull down for 1s and enter the WeChat
AirKiss function;
Pull down for 3s, the serial port exits
transparent transmission and enters AT
mode;
Pull down for 6s, the module restores the
default settings;
5
EPHY_LED4
I/O
PORT4 LED, Active low
LAN4 network port light
6
EPHY_LED3
I/O
PORT3 LED, Active low
LAN3 network port light
7
EPHY_LED2
I/O
PORT2 LED, Active low
LAN2 network port light
8
EPHY_LED1
I/O
PORT1 LED, Active low
LAN1 network port light
9
EPHY_LED0
I/O
PORT0 LED, Active low
WAN network port light
10
WLED_N
I/O
WiFi LED, Active low
WIFI LED flashes when there is a WiFi
signal, can be left floating
11
UART_TXD1
O
Serial port 1 data transmission
Serial port 1 output, hang up without using
12
UART_RXD1
I
Serial port 1 data reception
Serial port 1 input, hang up without using
13
GND
P
Ground
Ground
14
ANT
RF
On-board antenna RF interface,
default external antenna, this pin is
not connected
If you need to connect the foot, you need
to remove the antenna base and replace it
with a 0 ohm resistor.
15
I2S_SDI
I/O
I2S Data input
Undefined, please hang up
16
I2S_SDO
I/O
I2S Data output
Undefined, please hang up, cannot be
pulled up and down
17
I2S_WS
I/O
I2S channel selection,
0: left; 1: right
Undefined, please hang up