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5
32
RXN3/G17
A
RXN3
33
RXP4/G18
A
RXP4
34
RXN4/G19
A
RXN4
35
TXN0
A
TXN0
36
TXP0
A
TXP0
37
INT
O
INTERRUPT （Reserved）
38
RX0
I
RX0
39
TX0
O
TX0
40
RX1/PWM0
I/O
RX1
41
ELED0
O
ETH 0 LED(
activate low
)
42
RST
I
Reset
43
ES1
I
ES1
44
TX1/PWM1
I/O
TX1
45
G20
I/O
GPIO20 （Reserved）
46
VCC
POWER
5V INPUT
47
EL1/G21
I/O
ETH 1 LED
48
EL2/G22
I/O
ETH 2 LED
49
EL3/G23
I/O
ETH 3 LED
50
GND
Power
GND
51
RES7
-
（Reserved）
52
RTS1/G24
I/O
RTS1
Note: reserved pin is currently not used,please hang!
ES0 Function Introductions
：
1. After System boot, ES0 keep the lower level time 0.05s<t<6s, Serial 0 exit
transparent transmission.
2. After System boot, ES0 keep the lower level time 6s<t<12s, client settings
reset.
3. On electic ES0 is a lower level, the lower level time 6s<t<12s, client settin
gs reset.
ES1 Function Introductions
：
1. After System boot, ES1 keep the lower level time 0.05s<t<6s, Serial 1 exit
transparent transmission.
2. After System boot, ES1 keep thelower level time 6s<t<12s,factory reset.
