EV-K0-HCD Evaluation Kit User’s Manual
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.
Table 3
232 Connector
.
RS-
Pin Number(s)
2
3
5
1, 4, 6, 7, 8, 9
Function
TX RX Ground
Not
Connected
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.
Table 4.
Expansion IO Connector
Pin Number
Pin Name
Description
1
GND Ground
2
VDD
Logic power supply
3
RX/SI
UART0 RX signal / CSI data input signal
4
TX/SCK
UART0 TX signal / CSI clock signal
5
SO
CSI data output signal
6
IO
P0.0 / Timer TM00 capture input
7
SCL
I2C clock signal
8
SDA
I2C data signal
9
GND Ground
10
VDD
Analog voltage reference
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 k
Ω
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.
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