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2 power supply, 1 power supply pins, 2 operating voltage (vdd, vss) – Epson S1C33210 User Manual

Page 25: 2 operating voltage (v

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2 POWER SUPPLY

S1C33210 PRODUCT PART

EPSON

A-11

2 Power Supply

This chapter explains the operating voltage of the S1C33210.

2.1 Power Supply Pins

The S1C33210 has the power supply pins shown in Table 2.1.1.

Table 2.1.1 Power Supply Pins

Pin name

Pin No.

Function

QFP15-128

V

DD

8, 27, 47, 74, 93, 111 Power supply (+)

V

SS

3, 22, 39, 54, 67, 90,

102, 104

Power supply (-); GND

AV

DD

30

Analog system power supply (+); AV

DD

= V

DD

I/O

interface circuit

CPU core

Internal

peripheral

circuit

V

DD

2.7 to 3.6 V

2.7 to 3.6 V

GND

I/O pins

Analog circuits

(A/D converter)

AV

DD

V

SS

Figure 2.1.1 Power Supply System

2.2 Operating Voltage (V

DD

, V

SS

)

The core CPU, internal peripheral circuits, and external signal interfaces operate on the voltage difference between
the V

DD

and V

SS

pins. The following operating voltage can be used:

V

DD

= 2.7 V to 3.6 V (V

SS

= GND)

Note: The S1C33210 has 6 V

DD

pins and 8 V

SS

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.