
MB2146-401 F
2
MC-8FX Family Evaluation Board Operation Guide, Doc. # 002-07324 Rev. *A
15
Board Setup/Function
4.4
Selection of 5 V/3.3 V power supply
The details of a setup of 5 V/3.3 V power supply jumper plug selection (JP3/JP4) are shown in
Table 4-3. When you supply the power supply from the external power supply input terminals TP2
(VCC) and TP3 (VSS), please open the power supply selection jumper plug (JP3/JP4) of 5 V/3.3 V.
Note
: Be sure to give a setup of JP3/JP4 as the same. When a different setup is performed, the
power supply which is 5 V/3.3 V short-circuits, and has a possibility of becoming the cause of
the operation which is not right, or failure.
Table 4-3. 5 V/3.3 V power supply selection jumper plug
4.5
How to supply VCC of this board to the AVCC terminal of
evaluation MCU
When you supply VCC of this board to the analog power supply terminal (AVCC) of Evaluation MCU
built in the MCU board,please connect an attachied jumper plug to this board at an AVCC -VCC sup-
ply jumper plug (JP5). However, when you supply the AVCC power supply from an external power
supply input terminal (AVCC), please give as open.
4.6
How to supply VCC of this board to the AVR terminal of evaluation
MCU
When you supply VCC of this board to the analog standard voltage terminal (AVR) of Evaluation
MCU built in the MCU board,please connect an attachied jumper plug to this board at an AVR -VCC
supply jumper plug (JP6). However, when you supply the AVR standard voltage from an external
power supply input terminal (AVR), please give as open.
4.7
How to supply VCC of this board to the AVCC terminal and AVR
terminal of evaluation MCU
When you supply VCC of this board to the analog power supply terminal (AVCC) and analog stan-
dard voltage terminal (AVR) of Evaluation MCU built in the MCU board,please connect an attachied
jumper plug to this board at an AVSS - VSS connection jumper plug (JP7). However, when you sup-
ply an AVCC power supply from the terminal (AVCC) for an external power supply input, or when you
supply AVR standard voltage from the terminal (AVR) for an external power supply input, be sure to
give as open.
VCC Power supply suply origin
Supply voltage
Setup
JP3
JP4
AC adapter
3.3 V
3 - 2
3 - 2
AC adapter
5.0 V
1 - 2
1 - 2
External power supply input terminal
3.3 V
Open
Open
External power supply input terminal
5.0 V
Open
Open