User's Manual l TQMa335xL UM 0101 l © 2019, TQ-Systems GmbH
Page 18
3.2.4.10
Serial interfaces
The supported standards, transfer modes and rates of the following interfaces are to be taken from the AM335x Data Sheet (1).
3.2.4.11
CAN
The AM335x provides two integrated CAN controller. The signals of both CAN controllers are routed to the TQMa335xL pads.
The drivers have to be integrated on the carrier board.
The following table shows the signals used by the CAN interfaces.
Table 22:
CAN1 / CAN2 signals
TQMa335xL pad
Signal
Pad
Dir.
AM335x ball
H1
DCAN0_RX
UART1_RTS#
I/O
D17
G1
DCAN0_TX
UART1_CTS#
I/O
D18
K1
DCAN1_RX
UART0_RTS#
I/O
E17
J1
DCAN1_TX
UART0_CTS#
I/O
E18
3.2.4.12
I2C
The AM335x provides three I
2
C interfaces.
I2C0 and I2C1 are routed to the TQMa335xL pads and are available as a primary function.
The following table shows the signals used by the I2C buses.
Table 23:
I2C0 and I2C1 signals
TQMa335xL pad
Signal
Pad
Dir.
AM335x ball
Remark
C1
I2C0_SCL
I2C0_SCL
I/O
C16
3.3 kΩ PU to 3.3 V on TQMa335xL
D1
I2C0_SDA
I2C0_SDA
I/O
C17
3.3 kΩ PU to 3.3 V on TQMa335xL
F1
I2C1_SCL
UART1_TXD
I/O
D15
–
E1
I2C1_SDA
UART1_RXD
I/O
D16
–
The I2C0 bus is also used for the PMIC on the TQMa335xL. It has the following I
2
C addresses:
Table 24:
I2C0 addresses
Function
Device
Address
PMIC
TPS65910
0x12 / 0b001 0010
0x2D / 0b010 1101
If more devices have to be connected to the I2C0 bus on the carrier board, the maximum capacitive bus load accordingly to the
I
2
C standard has to be adhered to. If required additional pull-ups should be provided on the carrier board at the bus.
