Table 3.
CAN control jumpers
Jumper
Label
Description
J23
CAN2_EN
PHY U2 configuration
1-2: WAKE to GND
3-4: STB to 5 V
5-6: EN to 5 V
J32
CAN2
1-2: PHY TX to MCU
3-4: PHY RX to MCU
J33
CAN-PWR
1-2: 5.0V_SR to PHY U2 VCC
3-4: 12 V to PHY U2 VBAT
J34
INH/ERR
PHY U2 signal out
1: ERR
2: INH
J21
CAN_EN
PHY U1 configuration
1-2: WAKE to GND
3-4: STB to 5 V
5-6: EN to 5 V
J35
CAN-PWR
1-2: 5.0V_SR to PHY U1 VCC
3-4: 12 V to PHY U1 VBAT
J37
TTCAN_TX/MCAN1_TX
PHY U1 TX to MCU
1-2: TTCAN TX
2-3: MCAN1 TX
J38
TTCAN/MCAN1
PHY U1 RX to MCU
1-2: TTCAN RX
2-3: MCAN1 RX
J36
INH/ERR
PHY U1 signal out
1: ERR
2: INH
4.12
RS232 configuration
A female DB9 connector J19 and a RS232 transceiver device provide a physical RS232 interface, allowing a
direct RS232 connection to a PC or terminal.
The figure below shows the pin-out of the RS232 connector. It is to note that the hardware flow control is not
supported on this implementation.
Figure 8.
RS232 physical interface connector
UM2740
RS232 configuration
UM2740
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Rev 1
page 13/45
