354
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.
CV
CC
V
SS
Internal
logic
Step-down circuit
Internal
power
supply
V
CC
Figure 14.2 Power Supply Connection when Internal Step-Down Circuit Is Not Used