CY8CKIT-017 Cypress Semiconductor Corp, CY8CKIT-017 Datasheet - Page 23

• Manufacturer Part Number: CY8CKIT-017
• Description: KIT DEV CAN/LIN EXPANSION BOARD
• Manufacturer: Cypress Semiconductor Corp
• Series: -r

Specifications of CY8CKIT-017

• Accessory Type: Expansion Module
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: CY8CKIT-001, CY8CKIT-030, CY3280-22X45
• Other names: 428-3108

4.5.1
4.5.2
4.6
CY8CKIT-017 CAN/LIN Expansion Board Kit Guide, Doc. # 001-57814 Rev. *B
Jumper Settings of CY8CKIT-001 DVK for Using Port B
Port B uses the Port 2 GPIO pins for connections to two of the LEDs and the two LIN transceiver
circuits on the Expansion Board. Therefore, switch the jumper J12 to ‘Off’ position; this switches off
the power for the character LCD which is connected to Port 2 of CY8CKIT-001 DVK.
This means that the LCD on the DVK cannot be used when the port 2 GPIO pins are used when the
Expansion board is occupying Port B of the DVK.
It is possible to use the EBK for CAN on Port B of the DVK along with the LCD of the DVK. In this
case, the LEDs and both LIN circuits on the EBK should be isolated from the 2 x 20 header by
removing the corresponding 0 resistors on the Expansion Board.
Figure 4-4. J12 Jumper to Off Position
Debugging Restrictions When Using Port B
The default debugging interface for PSoC 3 and PSoC 5 devices is the Serial Wire Debugging
(SWD) interface. The circuits on the Expansion Board do not conflict with this debugging interface
when it occupies Port B. However, some of the Expansion Board circuits do conflict with the GPIO
pins of the JTAG and Serial Wire Viewer (SWV) debug interfaces. So, if the Expansion Board is
occupying Port B, these debug (JTAG and SWV) interfaces cannot be used.
Power Supply Configurations
By default, the CAN/LIN Expansion Board gets powered from the CY8CKIT-001 DVK through the
40-pin (2 X 20)connector.
The Expansion Board has a selection jumper on it (JP6) that must be set correctly to match the
power settings of the DVK. This jumper can be set to power up the circuits on the Expansion Board
with the V5_0, V3_3, or VADJ power supplies from the DVK board.
The CAN transceiver circuit only works when it is powered with 5V. Therefore, JP6 must be set to the
V5_0 setting when using CAN. The LIN circuits can works at either the V5_0 or the V3_3 power
supplies.
The Expansion Board has a pin on each CAN and LIN header (P2, P4, and P5) that can be
connected to the VIN power supply of the DVK. One reason to use this would be if there are two
CY8CKIT-001 boards (both with CY8CKIT-017 EBKs) that are connected to each other between
their CAN connectors or LIN connectors. In this case, it is useful to allow the VIN power supply of
one DVK to power up the other DVK (and its EBK) through the LIN or CAN header.
The "CANEXTPWER" jumper (JP3) is used to connect the VIN supply to a CAN connector pin. The
"LIN1EXTPWER" jumper (JP4) is used to connect the VIN supply to a LIN1 connector pin. The
"LIN2EXTPWER" jumper (JP5) is used to connect the VIN supply to a LIN2 connector pin.
Warning: Take extra precaution when populating any of the JP3, JP4, or JP5 jumpers. These
jumpers should only be populated when only one VIN power supply exists in the system.
Hardware
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