SH7147 Datasheet, PDF(1083/1108 Page) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family

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SH7147 Datasheet, PDF (1083/1108 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family

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Section 25 Electrical Characteristics

25.6 Usage Note

25.6.1 Notes on Connecting VCL Capacitor

This LSI includes an internal step-down circuit to automatically reduce the internal power supply

voltage to an appropriate level. Between this internal stepped-down power supply (VCL pin) and

the VSS pin, a capacitor (0.47 Î¼F) for stabilizing the internal voltage needs to be connected.

Connection of the external capacitor is shown in figure 25.35. The external capacitor should be

located near the pin. Do not apply any power supply voltage to the VCL pin.

Externally connected capacitors

for power-supply stabilization

VCL

One 0.47-ÂµF

capacitor

VSS

VCL

One 0.47-ÂµF

capacitor

VSS

Note: Do not apply any power supply voltage to the VCL pin.

Use multilayer ceramic capacitors (one 0.47-ÂµF capacitor

for each VCL pin), which should be located near the pin.

Figure 25.35 Connection of VCL Capacitor

Rev. 3.00 Oct. 06, 2008 Page 1059 of 1080

REJ09B0230-0300

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