Datasheet

Section 25 Power Supply Circuit
Rev. 6.00 Mar. 18, 2010 Page 804 of 982
REJ09B0054-0600
CV
CC
V
SS
Internal
logic
Step-down circuit
Internal
power
supply
Stabilization
capacitance
(approx. 0.1 µF)
V
CC
H8S/2258 Group: V
CC
= 4.0 V to 5.5 V
H8S/2238B, H8S/2236B:
V
CC
= 2.7 V to 5.5 V
(In the F-ZTAT version,
V
CC
= 3.0 V to 5.5 V)
Figure 25.1 Power Supply Connection for H8S/2258 Group, H8S/2238B, and H8S/2236B
(On-Chip Internal Power Supply Step-Down Circuit)
25.3 Power Supply Connection for H8S/2239 Group, H8S/2238R,
H8S/2236R, H8S/2237 Group, and H8S/2227 Group (No Internal
Power Supply Step-Down Circuit)
The H8S/2239 Group, H8S/2238R, H8S/2236R, H8S/2237 Group, and H8S/2227 Group do not
have an on-chip internal power supply voltage step-down circuit. Connect the external power
supply to the V
CC
pin and CV
CC
pin, as shown in figure 25.2. The external power supply is then
input directly to the internal power supply.
Note: The permissible range for the power supply voltage is 2.2 V to 3.6 V (in the F-ZTAT
version, 2.7 V to 3.6 V). Operation cannot be guaranteed if a voltage outside this range
(less than 2.2 V or more than 3.6 V) is input.
CV
CC
V
SS
Internal
logic
Internal
power
supply
V
CC
V
CC
= 2.2 V to 3.6 V
(In the F-ZTAT version,
V
CC
= 2.7 V to 3.6 V)
Figure 25.2 Power Supply Connection for H8S/2239 Group, H8S/2238R, H8S/2236R,
H8S/2237 Group, and H8S/2227 Group (No Internal Power Supply Step-Down Circuit)