SonMicro Electronics - www.sonmicro.com
SE1720-M24
Embedded Ethernet Module
HARDWARE MANUAL
Mentes Mh. 25124 Sk. Z.Cavus Sit. B Blok alti - 33150 - Mersin - Turkey
Tel: +90 324 341 18 94
Fax: +90 324 341 18 95 [email protected]
AXC-1UU
AXC-1UU / USB-UART Converter
GND
5V
PCRX(UTX)
PCTX(URX)
Not Used
Easy Serial Connection of the module with
PC without need of external power
Mini
USB
Connector
Power Domain & Power Supply Options
5V LDO
3V3
LDO
Se1720
Core Module
St232
5V
All System
is 3.3V
Power
Option 3
9V/12V DC
input at Pin29
Power Option 2
Power Option 1
5V Direct Input
at Pin1 or Pin33
3.3V Direct Input
at Pin10. Rs232 will
not be available
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Use only one power option:
Power Option 1(5V Direct, Pin#1 or Pin#33)
Power Option 2(3.3V Direct, Pin#10)
Power Option 3(9V/12VDC, Pin#29)
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All I/O is 3.3V CMOS(5V Tolerant) except for
Reserved(Pin9, 22) and Rs232 pins(Pin25, 26).
Pin25 and Pin26 have +/-12V Rs232 voltage
levels and should not be directly connected
to any MCU otherwise MCU get damaged
Pin9 and Pin22 are reserved, and not 5V
tolerant. They should be left unconnected.
UART2(Channel2) is connected to
on-board Rs232 IC on SE1720-M24
s t a n d a r d
m o d e l .
Do not use UART2 pins if module
comes with Rs232 IC or remove
R5 (0R) found on the bottom layer
of the module to prevent output
confliction with St232 and external
M C U
T X
p i n
For UART connection requirements,
instead of Rs232, you can still use
UART1 (Channel1)
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Connects over USB with Virtual Com Port
SE1720-M24
(5V) VDD1 1
(3.3V) VDD2 10
GND 2
GPIO4 3
OUT3/DE/DR 4
I2C SDA 5
I2C SCL 6
UART1 RX >> 7
UART1 TX << 8
(NC) RSV1 9
(NC) 11
GND 12
RESET 30
UART1 RX >> 31
UART1 TX << 32
(5V) VDD1 33
GND 34
Alternative UART1 connection
pins for external MCU or
PC with AXC-1UU USB-UART
converter tool.
9V/12VDC
25
26
27
28
29
GND
Rs232 RX <<
Rs232 TX >>
GND
(Channel2)
Rs232
+/-12V
13 GND
14 (NC)
15 UART2 TX >>
16 UART2 RX <<
17 GPIO1
18 GPIO2
19 SPI CLK
20 SPI MISO
21 SPI MOSI
22 RSV2 (NC)
23 RESET
24 GND
(Channel1)
UART1
3.3V/5V
(Channel2)
UART2
3.3V/5V
Do never connect Rs232 pins
directly to any Microcontroller
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