CY3274 Cypress High Voltage Programmable PLC Development Kit Guide, Doc. # 001-53598 Rev. *G
43
PLC Development Board
4.3.1
Development
4.3.1.1
User I/Os, Bread Board and GPIO Headers
This is the area where you make custom designs. All GPIO pins excluding those required for PLC
communication are routed to this area for ease of access. Some of the pins are shared for other pur-
poses (for example, the port 4 pins P4[6:0] are also connected to the LCD connector).
Header J18 has pins that are connected to user I/Os (potentiometer, push-button, and LEDs). In
, these connections are represented by the green arrows. To connect one of these user
I/Os to a CY8CPLC20 pin, connect a jumper wire between the respective header pins. For example,
to connect the push-button S4 to pin P1[6], place a jumper wire in SW on header J18 and the other
end in P16 on header J9.
The DIP switch bank S3 is not connected directly to any of the CY8CPLC20 pins. The DIP switch is
connected to header J12, so that a jumper wire can be connected to any of the pins. The DIP switch
is active LOW (connected to GND when in the ON position).
Figure 4-2. Bread Board
Potentiometer (R47)
Push- button (S4)
General LEDs
DIP Switch (S3) with
Header (J12)
Port0 Analog/Digital Port (J13)
Free: P01, P02, P04, P07
Port2 Digital Port (J16)
BIU LED: P21
RX LED: P23
TX LED: P25
Free: P26
Port4 Digital Port (J1)
LCD: P40
–
P46
Free: P47
Port1 Digital Port (J9)
I2C: P15, P17
Free: P12, P16
Port3 Digital Port (J10)
Free: P30
–
P37
Port5 Digital Port
Free: P50
–
P53
