HD6473887 Datasheet, PDF (390/523 Pages) Renesas Technology Corp – Hitachi Single-Chip Microcomputer

14.3 When Not Using the Internal Power Supply Step-Down Circuit
When the internal power supply step-down circuit is not used, connect the external power supply
to the V_CC pin and CV_CC pin, as shown in figure 14-2. The external power supply is then input
directly to the internal power supply.
Note: The permissible range for the power supply voltage is 1.8 V to 5.5 V. Operation cannot be
guaranteed if a voltage outside this range (less than 1.8 V or more than 5.5 V) is input.
VCC
Step-down circuit
CVCC
Internal ^Internal
logic ^power
supply
VSS
Figure 14-2 Power Supply Connection when Internal Step-Down Circuit Is Not Used
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