2 POWER SUPPLY

2 Power Supply

This chapter explains the operating voltage of the S1C33L03.

2.1 Power Supply Pins

The S1C33L03 has the power supply pins shown in Table 2.1.1.

Table 2.1.1 Power Supply Pins

Pin name

 

Pin No.

 

 

 

Function

 

VDD

 

8,51,78,127

 

 

 

Power supply (+) for the internal logic

VSS

3,27,45,66,82,98,105,114,116,136

Power supply (-); GND

 

VDDE

 

21,59,91,132

 

 

 

Power supply (+) for the I/O block

 

AVDDE

 

36

 

 

 

 

Analog system power supply (+); AVDDE = VDDE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.8 to 3.6 V

VDD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Internal

 

 

 

 

 

 

 

 

 

 

 

CPU core

 

 

peripheral

 

 

 

 

 

 

 

 

 

 

 

 

 

 

circuit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.8 to 5.5 V

VDDE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

I/O

 

 

 

I/O pins

 

 

 

 

 

 

 

interface circuit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.8 to 5.5 V

GND

AVDDE

Analog circuits (A/D converter)

VSS

Figure 2.1.1 Power Supply System

2.2 Operating Voltage (VDD, VSS)

The core CPU and internal peripheral circuits operate with a voltage supplied between the VDD and VSS pins. The following operating voltage can be used:

VDD = 1.8 V to 3.6 V (VSS = GND)

Note: The S1C33L03 has 4 VDD pins and 10 VSS pins. Be sure to supply the operating voltage to all the pins. Do not open any of them.

The operating clock frequency range (OSC3) is 5 MHz to 50 MHz with this voltage.

A-12

EPSON

S1C33L03 PRODUCT PART