IGEP
TM
SMARC iMX6
Hardware Reference Manual
ISEE 2007 S.L. All rights reserved, IGEP is a registered trademark from ISEE 2007 S.L. The following is provided for informational purposes only.
NIF:ESB64377005 Document:
MAN-IGEP0046-001
/ Revision:
1.3
/ Date:
23/06/2016
26
In the next figure is shown another example to use the UART SMARC pins as RS485 bus (page 41 of SMARC
Design Guide V_IO=1V8).
Figure 19 RS485 example: RS485 circuit
Pin
Volt
Level
Dev
Pin
Main Function
Main
MUX
Type
Fixed
Function
Comments
1
ST
UART
P134
1V8
E24
SER1_TX
4
OUT
NO
Debug UART2 Transmit Data Output
P135
1V8
E25
SER1_RX
4
IN
NO
Debug UART2 Receive Data Input
2
ND
UART
P136
1V8
B17
SER2_TX
2
OUT
NO
UART3 Transmit Data Output
P137
1V8
E16
SER2_RX
2
IN
NO
UART3 Receive Data Input
P138
1V8
H21
SER2_RTS#
4
OUT
NO
UART3 CTSn Output
P139
1V8
J20
SER2_CTS#
4
IN
NO
UART3 RTSn Input
3
RD
UART
P140
1V8
M2
SER3_TX
3
OUT
NO
UART4 Transmit Data Output
P141
1V8
L1
SER3_RX
3
IN
NO
UART4 Receive Data Input
Table 14 UART pins