ST6200C/ST6201C/ST6203C
9.3 A/D CONVERTER (ADC)
9.3.1 Introduction
9.3.2 Main Features
■ 8-bit conversion
The on-chip Analog to Digital Converter (ADC) pe-
ripheral is a 8-bit, successive approximation con-
verter. This peripheral has multiplexed analog in-
put channels (refer to device pin out description)
that allow the peripheral to convert the analog volt-
age levels from different sources.
■ Multiplexed analog input channels
■ Linear successive approximation
■ Data register (DR) which contains the results
■ End of Conversion flag
■ On/off bit (to reduce consumption)
The result of the conversion is stored in a 8-bit
Data Register. The A/D converter is controlled
through a Control Register.
■ Typical conversion time 70 µs (with an 8 MHz
crystal)
The block diagram is shown in Figure 34.
Figure 34. ADC Block Diagram
f
f
INT
ADC
DIV 12
OSC
OFF
EAI EOC STA PDS D3
D1 D0
ADCR
I/O PORT
AIN0
AIN1
ANALOG TO DIGITAL
CONVERTER
PORT
MUX
AINx
DDRx
ORx
DRx
ADR
D7 D6 D5 D4 D3 D2 D1 D0
Note: ADC not present on some devices. See device summary on page 1.
51/104
1
ETC [ ETC ]
