C167CS datasheet(358/517 Pages) INFINEON

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C167CS

Derivatives

The Analog/Digital Converter

User’s Manual

18-1

V2.0, 2000-07

The Analog/Digital Converter

The C167CS provides an Analog/Digital Converter with 10-bit resolution and a sample

& hold circuit on-chip. A multiplexer selects between up to 24 analog input channels

(16 standard channels as alternate functions of Port 5, 8 extension channels as alternate

functions of PORT1) either via software (fixed channel modes) or automatically (auto

scan modes).

To fulfill most requirements of embedded control applications the ADC supports the

following conversion modes:

• Fixed Channel Single Conversion

produces just one result from the selected channel

• Fixed Channel Continuous Conversion

repeatedly converts the selected channel

• Auto Scan Single Conversion

produces one result from each of a selected group of channels

• Auto Scan Continuous Conversion

repeatedly converts the selected group of channels

• Wait for ADDAT Read Mode

start a conversion automatically when the previous result was read

• Channel Injection Mode

insert the conversion of a specific channel into a group conversion (auto scan)

A set of SFRs and port pins provide access to control functions and results of the ADC.

Figure 18-1

SFRs and Port Pins Associated with the A/D Converter

MCA04472

ADDAT

ADCON

ADCIC

Ports & Direction Control

Alternate Functions

Data Registers

Control Registers

Interrupt Control

ADDAT A/D Converter Result Register

ADDAT2 A/D Converter Channel Injection Result Reg.

ADCON A/D Converter Control Register

ADCIC

A/D Converter Interrupt Control Register

(End of Conversion)

ADEIC

A/D Converter Interrupt Control Register

(Overrun Error/Channel Injection)

ADEIC

Port 5 Analog Input Port:

AN0/P5.0...AN15/P5.15

P5DIDIS Port 5 Digital Input Disable Register

P1L

Port 1 Input/Output Port (Lower Part):

AN16/P1L.0...AN23/P1L.7

P1DIDIS Port 1 Digital Input Disable Register

ADDAT2

P5DIDIS

P1L

P1DIDIS

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