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78K0R - Cool it!
3.1.3 UART mode selection, SW2/bit4-bit5
By switching bit4 and bit5 of SW2 to ON the UART3 signals RxD3 and TxD3 are connected to the
µPD78F0731 USB microcontroller. Within this mode standard serial communication to a terminal program
running on the HOST PC can be established.
Switching bit4 and bit5 to OFF disconnects the UART3 serial lines from the µPD78F0731 USB
microcontroller.
SW2/bit4
OFF
ON
Table 4: UART mode selection, SW2/bit4-bit5
3.1.4 L_EVDD control, SW2/bit6
Switch SW2/bit6 controls the power supply (L_EVDD) for the LC display, LED1 and LED2. By switching
bit6 to ON VDD is applied to L_EVDD. Switching bit6 to OFF disconnects the power supply for the output
devices.
SW2/bit6
OFF
ON
3.1.5 L_VDD control, SW2/bit7
Switch SW2/bit7 controls the power supply (L_VDD) for the digital logic of the 78K0R – Cool it! board. By
switching bit7 to ON VDD is applied to L_VDD. Switching bit7 to OFF disconnects VDD.
SW2/bit7
OFF
ON
3.1.6 L_AVREF0 control, SW2/bit8
Switch SW2/bit8 controls the power supply (L_AVREF0) for the analog components – the operational
amplifier LM324M – of the 78K0R – Cool it! board. By switching bit8 to ON VDD is applied to L_AVREF0.
Switching bit8 to OFF disconnects VDD.
SW2/bit8
OFF
ON
SW2/bit5
OFF
ON
Mode
L_EVDD disconnected
L_EVDD = VDD
Table 5: L_EVDD control, SW2/bit6
Mode
L_VDD disconnected
L_VDD = VDD
Table 6: L_VDD control, SW2/bit7
Mode
L_AVREF0 disconnected
L_AVREF0 = VDD
Table 7: L_AVREF0 control, SW2/bit8
User's Manual U18426EE1V0UM00
Mode
disconnect UART3 signals
connect UART3 signals
15
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