H8SSLASH2224 datasheet(890/1071 Pages) RENESAS

890 / 1071 page

Section 25 Power Supply Circuit

Rev. 5.00 Aug 08, 2006 page 804 of 982

REJ09B0054-0500

CVCC

VSS

Internal

logic

Step-down circuit

Internal

power

supply

Stabilization

capacitance

(approx. 0.1

µF)

VCC

H8S/2258 Group: VCC = 4.0 V to 5.5 V

H8S/2238B, H8S/2236B:

VCC = 2.7 V to 5.5 V

(In the F-ZTAT version,

VCC = 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 VCC pin and CVCC 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.

CVCC

VSS

Internal

logic

Internal

power

supply

VCC

VCC = 2.2 V to 3.6 V

(In the F-ZTAT version,

VCC = 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)

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