VERSION 1.0
J130 (38205-X)
CAN controller (MCP2515T-I/ML)
The two SPI to CAN controllers add two CAN bus interfaces to the TX1, as there is no internal CAN controller in
the TX1. The SPI bus, RESET and INT are shared between the 2 CAN controllers (J120 rev 1). The J120 rev 2
will use separate SPI interrupts. Just SPI1_CS0 and SPI1_CS1 select one of the two controllers. The two CAN
busses are available on J9 (CAN1) and J10 (CAN2).
CAN controller 1 (not populated):
CAN controller 2:
CAN1 (J9):
This CAN port is reserved to connect to the build-in CAN controller of the TX2. RN29 must be populated. The
CAN0 port of the TX2 connects to the CAN transceiver (TJA1051TK/3). This connects to the CAN connector. The
port is terminated by 120 Ohm.
CAN2 (J10):
The CAN Port connects to the SPI to CAN controller 2.
Pin
Function
Jetson TX1
Description
15
SO
F14
SPI1_MISO (level shifted to 3.3V)
14
SI
F13
SPI1_MOSI (level shifted to 3.3V)
12
SCK
G13
SPI1_CLK (level shifted to 3.3V)
22
/CS
E14
SPI1_CS0 (level shifted to 3.3V)
12
/INT
H3
GPIO20_AUD_INT (low active with 10k pull-up to 3.3V)
17
/RESET
D7
GPIO5_CAM_FLASH_EN is inverted and connected to the RESET inputs
Pin
Function
Jetson TX1
Description
15
SO
F14
SPI1_MISO (level shifted to 3.3V)
14
SI
F13
SPI1_MOSI (level shifted to 3.3V)
12
SCK
G13
SPI1_CLK (level shifted to 3.3V)
22
/CS
E13
SPI1_CS1 (level shifted to 3.3V)
12
/INT
H3
GPIO20_AUD_INT (low active with 10k pull-up to 3.3V)
17
/RESET
D7
GPIO5_CAM_FLASH_EN is inverted and connected to the RESET inputs
Pin
Function
Jetson TX1
Description
1
5V
-
5V power for the CAN bus (500 mA)
2
CAN2_H
-
CAN data high (with 120 Ohm termination)
3
CAN2_L
-
CAN data low
4
GND
-
Ground (0V)
AUVIDEA GMBH
TECHNICAL REFERENCE MANUAL
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