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2.7
RS-232 Interface
A DB9 male connector is used for the RS-232 interface. By default, RS-232 function is disabled. To
enable it, place DIP switch (refer to SW1 in the schematics) position 4 in the "ON" position.
Pin Number(s)
2
Function
TX
2.8
Expansion IO Connector
A dual-row 10-pin header footprint in 2mm-pitch is available on the EV-K0-HCD board (refer to CN3 in
the schematics), the uPD78F8024 device's UART0/CSI and I2C signals are pulled out on this
connector. The following table shows the pin out connections.
Pin Number
Pin Name
1
GND
2
VDD
3
RX/SI
4
TX/SCK
5
SO
6
IO
7
SCL
8
SDA
9
GND
10
VDD
The expansion IO connector pin outs are compatible with the NEC Electronics ZigBee sticks interface,
users can add ZigBee / 802.15.4 wireless capability to LED lighting applications.
2.9
USB Programming and Debugging Interface
The EV-K0-HCD evaluation board implements an on-board USB programming and debugging
interface using the NEC Electronics µPD78F0730 USB MCU. You can download code to the
µPD78F8024 HCD/LED MCU from a host computer via a mini-USB cable, and then proceed to debug
that code (the debug software will be available by June 2008).
2.10 Temperature Sensor
The EV-K0-HCD board populates a negative temperature coefficient (NTC) 10 kΩ thermistor to sense
the temperature of the on-board LEDs. By default, the thermistor is disconnected from the
µPD78F8024 MCU's A/D converter input. To connect to it, place DIP switch position 5 in the "ON"
position.
EV-K0-HCD Evaluation Kit User's Manual
RS-
232 Connector
Table 3
.
3
RX
Expansion IO Connector
Table 4.
Description
Ground
Logic power supply
UART0 RX signal / CSI data input signal
UART0 TX signal / CSI clock signal
CSI data output signal
P0.0 / Timer TM00 capture input
I2C clock signal
I2C data signal
Ground
Analog voltage reference
7
5
1, 4, 6, 7, 8, 9
Ground
Not Connected
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