CY8CKIT-026 CAN and LIN Shield Kit Guide, Doc. No. 002-03798 Rev. *C
21
Hardware
Ensure extra care when connecting an analyzer to either of the LIN connectors. If the LIN analyzer
provides 12 V supply already to its VBAT pin, remove jumper J16 for LIN1 connector and J7 for LIN2
connector or do not power the shield with external 12 V supply through the J11 and J12 connectors.
3.3.2
Using the LIN Transceiver NWAKE Pins
Both TJA1020 LIN transceiver devices have an NWAKE input that can be used to wake up a sleep-
ing LIN bus without interaction from the PSoC LIN controller. If the NWAKE input needs to be used
for either LIN circuit, the signal can be accessed using the test points on the board labeled with
NWAKE1 for LIN1 transceiver circuit and NWAKE2 for LIN2 transceiver circuit, respectively, as
shown in
Figure 3-7. NWAKE Test Points
3.3.2.1
LIN Signal Connector for LIN transceivers
shows the pinout of the 3-pin female LIN signal connector (J15 for LIN1 and J6 for LIN2)
on the shield board.
LINx_RX, LINx_TX and LINx_NSLP pins need to be connected to the LIN RX pin, LIN TX pin and
GPIO (enable/sleep control) pin of the microcontroller respectively, using external connecting wires.
These connections are not hard-wired on the board so that maximum flexibility for the LIN pin
placement in the microcontroller is provided.
Warning:
Since the jumpers J16 and J7 are populated by default, ensure extra care while
connecting the LIN analyzer VBAT pin to the shield kit pin. The Shield Kit or Pioneer Kit or the
supply adapter can be damaged if the Shield Kit and Pioneer Kit are powered by a power supply at
the VIN rail and a different power supply is connected through pin 3 of either of the LIN
connectors.
Table 3-4. LIN Signal Connector Pinout
Pin
Signal
1
LINx_RX
2
LINx_TX
3
LINx_NSLP
