DDC
-76D-01
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User_guide_DDC-76D-01_160201
Page 5
Hardware
Top view
Power supply
DDC-76D-01 should be supplied from CK-USB-04A or DK-EVAL-04A development kit connected via connector XC3. It is not
intended to be supplied from other power sources. LDO voltage regulator MCP1700T-3002E/TT by Microchip converts the
internal supply voltage to 3 V.
If CK-USB-04A is used, IQRF IDE development environment controls connection to internal supply voltage (to perform TR
upload). If DK-EVAL-04A is used (and switched on), the DDC-76D-01 is supplied continually.
RF transceiver
TR-76DA with on-board antenna.
Refer to the TR-76D datasheet.
Pushbutton
User pushbutton is completely controlled from the application inside the transceiver. It is intended for task such as RFPGM
(wireless upload) termination, bonding initialization, wake-up from TR sleep, MCU interrupt or any other user-specific
functionality.
Pressing the pushbutton is indicated by red LED (LED3).
System LEDs
LED1 (green) and LED2 (red) can be connected to the transceiver by the dipswitch. They are managed by IQRF OS (LEDG
and LEDR) and DPA framework (if applied), and can also be handled by the user application.
Connectors XC1 and XC2
Connectors XC1 and XC2 are intended for connection to DDC kits, a user development board or some user equipment.
DDC kits
DDC-IO-01, DDC-SE-01 or DDC-RE-01 can be connected via connectors XC1 or XC2. All I/O pins (protected by serial
resistors) are accessible at these two connectors. Note that the Q13 pin of the transceiver is input only.
Some limitations resulting from factual circuitry of DDC kits should be taken into account. E.g., relay 2 can not be controlled
if DDC-RE-01 is connected via connector XC2.
