7721 datasheet(253/577 Pages) RENESAS

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A-D CONVERTER

7721 Group User’s Manual

12–2

12.1 Overview

Table 12.1.1 lists the performance specifications of the A-D converter.

Table 12.1.1 Performance specifications of A-D converter

12.1 Overview

Item

A-D conversion method

Resolution

Absolute accuracy

Analog input pin

Conversion rate per analog input pin

Performance specifications

Successive approximation conversion method

8 bits

±3 LSB

8 pins (AN0 to AN7) (Note)

φADV cycles

φADV: A-D converter’s operation clock

The A-D converter has the 4 operation modes listed below.

•One-shot mode

This mode is used to perform the operation once for a voltage input from one selected analog input pin.

•Repeat mode

This mode is used to perform the operation repeatedly for a voltage input from one selected analog input

pin.

•Single sweep mode

This mode is used to perform the operation for voltages input from multiple selected analog input pins, one

at a time.

•Repeat sweep mode

This mode is used to perform the operation repeatedly for voltages input from multiple selected analog

input pins.

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