IBASE SMARC-EVK1 - Manual (Page 43)

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17 IBASE Technology Inc.
4.2.12. Asynchronous Serial Ports
Serial Port Signals
Pin Signal Name I/O Type Power Rail Description
P134 UART1_TX O CMOS 3.3V Serial port 1 data out
P135 UART1_RX I CMOS 3.3V Serial port 1 data input
P140 UART2_TX O CMOS 3.3V Serial port 2 data out
P141 UART2_RX I CMOS 3.3V Serial port 2 data input
P129 UART4_TX O CMOS 3.3V Serial port 4 data out
P130 UART4_RX I CMOS 3.3V Serial port 4 data input
P131 U4_RTS# O CMOS 3.3V Request to Send handshake line for serial port 4
P132 U4_CTS# I CMOS 3.3V Clear to Send handshake line for serial port 4
P136 UART5_TX O CMOS 3.3V Serial port 5 data out
P137 UART5_RX I CMOS 3.3V Serial port 5 data input
P138 U5_RTS# O CMOS 3.3V Request to Send handshake line for serial port 5
P139 U5_CTS# I CMOS 3.3V Clear to Send handshake line for serial port 5
Reference Schematic
C116 0.1UF/25V/4
C94 0.1UF/25V/4
U15
SP3232ECY -L
C1+ 1
V+
2
C1- 3
C2+
4
C2- 5
V-
6
T2-OUT
7
R2-IN
8
R2-OUT
9
T2-IN
10 T1-IN 11
R1-OUT
12
R1-IN
13
T1-OUT 14
GND
15
VCC 16
C96
0.1UF/25V/4 C105 0.1UF/25V/4
+5V_VCC
C95
0.1UF/25V/4 RS232_RX2
RS232_TX2
CN15
HK_DF11-12S-PA66H
1
1
2
2
3 3 4 4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
RS232_CTS#5
RS232_RX5
RS232_TX5
RS232_RTS#5
UART2_TX 13
+5V_VCC
RS232_TX1
RS232_RX1
UART2_RX 13 RS232_CTS#5
RS232_RX5
RS232_TX5
RS232_RTS#5
UART5_CTS# 13
UART5_RTS# 13
C97 0.1UF/25V/4
U16
SP3232ECY -L
C1+ 1
V+
2
C1- 3
C2+
4
C2- 5
V-
6
T2-OUT
7
R2-IN
8
R2-OUT
9
T2-IN
10 T1-IN 11
R1-OUT
12
R1-IN
13
T1-OUT 14
GND
15
VCC 16
C113
0.1UF/25V/4
C119 0.1UF/25V/4
C117 0.1UF/25V/4
+5V_VCC
C118
0.1UF/25V/4
UART5_RX 13
UART5_TX 13
RS232_RX2
RS232_TX2
C121 0.1UF/25V/4
RS232_RX1
RS232_TX1
UART1_RX 13
UART1_TX 13