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CY3274 Cypress High Voltage Programmable PLC Development Kit Guide, Doc. # 001-53598 Rev. *G
PLC Development Board
4.3.1.2
CY8CPLC20 PLC Device
This section has the CY8CPLC20-OCD device, which has the integrated transmit and receive
modem and network protocol. It also has the I
2
C header for optional communication with an external
host processor. The ISSP header is provided to program the device. The device also has built-in
debug support using the RJ45 connector for use with the ICE debugger. There are also three
dedicated LEDs, which can be used to indicate communication on the powerline: green LED for TX,
red LED for RX, and yellow LED for BIU.
Figure 4-3. The Development Section
Table 4-1. Headers and Jumpers
Headers and Jumpers
Description
BIU LED[DS4]
Yellow LED that can be used to indicate when the transmit frequency band
is in use.
CY8CPLC20-OCD
Cypress Powerline transceiver chip. It is a 100-pin on-chip debugger (OCD)
device.
J8
Two-pin header for connecting to Vcc and Gnd for debug. Do not use these
pins to power an external board.
JP1 (PWR)
This jumper should be connected to power an external board. After this
jumper is connected, power for the external board can be derived from the V
(V
DD
) and G (Gnd) connectors on the I2C header (J15). The CY3274 board
can provide a maximum of 50 mA at 5 V to an external board through the V
and G pins on the I2C header (J15).
JP5 (Reset)
The jumper enables the reset of the PLC device through an external board.
After this jumper is connected, the external board reset can be connected to
the R (Reset) pin on the I2C header (J15).
