HD404459 Datasheet, PDF (101/122 Pages) Renesas Technology Corp – 4-bit HMCS400-series microcomputers

HD404459 Series
Notes on Mounting
Assemble all parts including the HD404458/HD404459 on a board, noting the points described below.
Between the V_CC and GND lines, connect capacitors designed for use in ordinary power supply circuits.
An example connection is described in figure 82.
No resistors can be inserted in series in the power supply circuit, so the capacitors should be connected in
parallel.
The capacitors are a large capacitance C₁ and a small capacitance C₂.
V_CC
C₁ C₂
V_CC
GND
GND
Figure 82 Example of Connections
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