Epson S1C33L03 User Manual

The Analog Block contains an A/D converter with the following features:

• Conversion method:

Successive comparison

• Resolution:

10 bits

• Input channels:

Maximum of 8

• Conversion time:

Maximum of 10 µs (when a 2-MHz input clock is selected)

• Conversion range:

Between V

SS

 and AV

DDE

• Two  conversion modes can be selected:

Normal mode:

Conversion is completed in one operation.

Continuous mode: Conversion is continuous and terminated through software control.

Continuous conversion of multiple channels can be performed in each mode.

• Four  types of A/D-conversion start triggers can be selected:

Triggered by the external pin (#ADTRG)

Triggered by the compare match B of the 16-bit programmable timer 0

Triggered by the underflow of the 8-bit programmable timer 0

Triggered by the software

• A/D  conversion results can be read out from a 10-bit data register.

• An  interrupt is generated upon completion of A/D conversion.

Figure 2.1 shows the structure of the A/D converter.

Internal data bus

AV

DDE

V

SS

Analog

input

decoder

Control circuit

AD0

AD1

AD2

AD3

AD4

AD5

AD6

AD7

#ADTRG

8-bit timer 0

16-bit timer 0

Clock

generator

Prescaler

Interrupt request

Analog

block

Successive 

approximation 

block

Data

register

Interrupt

control 

circuit

Control

registers

Figure 2.1  Structure of A/D Converter