HD64F3670 Datasheet, PDF (230/305 Pages) Renesas Technology Corp – Hitachi Single-Chip Microcomputer

15.2 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 pin and V pin, as shown in figure 15-2. The external power supply is then input
CL
CC
directly to the internal power supply. The permissible range for the power supply voltage is 3.0 V
to 3.6 V. Operation cannot be guaranteed if a voltage outside this range (less than 3.0 V or more
than 3.6 V) is input.
V_CC
Step-down circuit
V_CL
Internal ^Internal
logic ^power
supply
V_SS
V_CC = 3.0 to 3.6 V
Figure 15-2 Power Supply Connection when Internal Step-Down Circuit Is Not Used
Rev. 1.0, 03/01, page 206 of 280