CEB-V850ES/FJ3·SJ3 Evaluation Board HardwareUser’s Manual
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3.5 Notes at the time of user circuitry
In adding and connecting a user circuit at an evaluation board, please consider the following notes to the
design and manufacture which cannot receive influence of a noise etc. in reference easily.
Moreover, there are restrictions matters, such as drive current, in each terminal. Please refer to these notes
and a correspondence CPU user’s manual, and use it within rating.
3.5.1 Consumption current
Since consumption current is generating internal logic voltage from external 12V power supply, it
recommends combining this board and an extension board and using it below 0.1A. (The consumption
current in a main part simple substance is about 0.05A.)
When the current exceeding 0.1A is required, please use a heat sink for U13 as much as possible.
When the current exceeding 0.2A is required, please be sure to use a heat sink. If the current which
exceeds 0.2A without a heat sink is sent, U13 generates heat and there is danger, such as a burn and a
fire.
Moreover, power supply supply stops by the shutdown function which U13 has.
The AC adaptor more than power supply capacity 12v, 0.5A is enclosed.
3.5.2 I/O signals
Each signal line currently outputted to J3 and J4 is outputted to the connector, after pulling up by 47k
Ω
.
Pay attention to pattern damage, pattern bridge, etc., and implement measures as needed, such as
removing mounted parts.
For the specifications of each pin and the electrical specifications, refer to the correspondence CPU user’s
manual.
