C 8 0 5 1 F 4 1 x
10
Rev. 0.3
4.8. IDAC Connectors (J7, J11)
The C8051F410 target board also features two Current-to-Voltage 750
load resistors that may be connected to
the 2-bit current-mode Digital-to-Analog Converters (IDACs) on port pins P1.0 and P1.1. Install a shorting block on
J13 to connect the IDAC0/P1.0 pin of the target device to a load resistor. Install a second shorting block on J14 to
connect the IDAC1/P1.1 pin of the target device to a load resistor. The IDAC signals are then routed to the J1 and
J13 and J14 connectors.
4.9. USB Debug Adapter Target Board Power Connector (J8)
The USB Debug Adapter includes a connection to provide power to the target board. This connection is routed
from J4[10] to J8[1]. Place a shorting block at header J8[2–3] to power the board directly from an ac/dc power
adapter. Place a shorting block at header J8[1-2] to power the board from the USB Debug Adapter. The second
option is not supported with either the EC1 or EC2 Serial Adapters.
4.10. smaRTClock (Real Time Clock)
The C8051F41x Target Board is designed for developing system using the on-chip smaRTClock. A 32 kHz watch
crystal is installed in Y1 and a battery holder (BH1) is installed for use as a backup power source. To connect the
battery to the VBAT input on the MCU, connect pin 1 and 2 of J30 and short J29. The variable voltage regulator
with potentiometer (R23) may also be used to generate the battery voltage and simulate a battery in its various
charge conditions. See the C8051F41x data sheet for more details about the smaRTClock.
