SH7080_09 Datasheet, PDF (1536/1622 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family

Section 28 Electrical Characteristics
28.6 Usage Note
28.6.1 Notes on Connecting V_CL 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 (V_CL pin) and
the V_SS pin, a capacitor (0.47 μF) for stabilizing the internal voltage needs to be connected.
Connection of the external capacitor is shown in figure 28.64. The external capacitor should be
located near the pin. Do not apply any power supply voltage to the V_CL pin.
External power-supply
stabilizing capacitor
One 0.47-µF capacitor
One 0.47-µF
capacitor
VCL ^VCL
VSS
VSS _VCL
VSS
One 0.47-µF
capacitor
Note: Do not apply any power supply voltage to the VCL pin.
Use multilayer ceramic capacitors (one 0.47-µF capacitor
for each VCL pin), which should be located near the pin.
Figure 28.64 Connection of V_CL Capacitor
Rev. 4.00 Dec. 15, 2009 Page 1476 of 1558
REJ09B0181-0400