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21
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Idea
J11 (pin header, RS232)
Pin Signal
Description
Pin Signal
Description
1
RS232_TX6
Transmit Data 2
RS232_RX6
Receive Data
3
GND
Ground
4
VCC_IO
3.3V power supply
J13/UART4 (pin header, TTL)
Pin Signal
Description
Pin Signal
Description
1
PH4/UART4_TX/EINT4
Transmit Data 2
PH5/UART4_RX/
EINT5
Receive Data
3
GND
Ground
4
VCC_IO
3.3V power supply
J14/UART7 (pin header, TTL)
Pin Signal
Description
Pin Signal
Description
1
PI20/UART7_TX/PWM2 Transmit Data 2
PI21/UART7_RX/
PWM3
Receive Data
3
GND
Ground
4
VCC_IO
3.3V power supply
J8/Debug (pin header, TTL)
Pin Signal
Description
Pin Signal
Description
1
PB23/UART0_RX
Receive Data 2
PB22/UART0_TX Transmit Data
3
GND
Ground
2.7 Ethernet
EMA40i adopts RTL8211E as the Ethernet chip. RJ45 connector (offset). A 10-pin connector is also
available for expansion.
Feature
Ethernet Access Controller (
EMAC
)
2
1
3
4
1
2
7
8
13
12
2
1
9
10