VERSION 1.9
J120 (38198-X)
HDMI (J3)
This is a 19 pin mini HDMI connector. Please note that the HDMI and mini HDMI connector have different pin
outs.
UART 0 (J7)
This is a 6 pin connector with 1.25 mm pitch. Please connect to USB TTL serial converter (3.3V TTL level).
Normally just connect TXD, RXD, and GND. Swap data lines. Default speed: 115200 bps. This is the
configuration for the J120 rev 1 and J120 rev 2 with a serial number < 2021.
Pin
Function
Jetson TX1
Description
1
GND
-
Ground
2
D
E39
HDMI data lane 2
3
DP1_TXD0-
E38
HDMI data lane 2
4
GND
-
Ground
5
D
C38
HDMI data lane 1
6
DP1_TXD1-
C37
HDMI data lane 1
7
GND
-
Ground
8
D
D37
HDMI data lane 0
9
DP1_TXD2-
D36
HDMI data lane 0
10
GND
-
Ground
11
D
E36
HDMI clock
12
DP1_TXD3-
E35
HDMI clock
13
GND
-
Ground
14
CEC
B33
HDMI_CEC
15
HDMI_DDC_SCL
A35
DP1_AUX_CH
16
HDMI_DDC_SDA
A34
DP1_AUX_CH*
17
reserved
-
not connected
18
PWR
-
5V power (max. 500 mA)
19
HPD
A33
inverted and connected to DP1_HPD
Pin
Function
Jetson TX1
GPIO
Description
1
5V
-
-
5V power output
2
UART0_TXD
H12
GPIO3_PU.00
UART 0 console port (3.3V TTL level): transmit data output
3
UART0_RXD
G12
GPIO3_PU.01
UART 0 console port (3.3V TTL level): receive data input
4
UART0_CTS
H11
GPIO3_PU.03
UART 0 console port (3.3V TTL level): clear to send
5
UART0_RTS
G11
GPIO3_PU.02
UART 0 console port (3.3V TTL level): ready to send
6
GND
-
-
Ground
AUVIDEA GMBH
TECHNICAL REFERENCE MANUAL
18