Usb Programming And Debugging Interface; Ambient Light Sensor; Temperature Sensor; Dip Switch - NEC 78K0 User Manual

78K0 - Shine It!

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 (for
information about debugging refer to the regarding chapter).

2.10 Ambient Light Sensor

The EV-K0-HCD board populates a miniature surface-mount light sensor, part number APDS-9005 from
Avago Technologies, to sense the intensity of ambient light. By default, this sensor is disconnected from
the µPD78F8024 MCU's A/D converter input. To connect to it, place DIP switch (SW1) position 5 in the
"ON" position.

2.11 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 6 in the "ON" position.

2.12 DIP Switch

The EV-K0-HCD board uses a 6-position DIP switch (SW1) for configuration purposes. The following
table shows the various configuration options.
Switch No.
SW1-1
SW1-2
SW1-3
SW1-4
SW1-5
SW1-6

2.13 Reset Switch

The on-board reset switch (refer to SW2 in the schematics) can be used to reset the µPD78F8024 MCU.
OFF
USB programming mode
Don't Care
User-defined
RS-485 enabled / RS-232
disabled
Ambient light sensor disabled
Temperature sensor disabled

Table 5: Board Configuration Options

User's Manual U19610EE3V0UM00
Setting
ON
Normal operation
Self-flash programming mode
User-defined
RS-232 enabled / RS-485 disabled
Ambient light sensor enabled
Temperature sensor enabled
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