ST7FLITE29 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
ST7FLITE29
STMicroelectronics
'ST7FLITE29' PDF : 133 Pages View PDF
ST7LITE2
11.5 10-BIT A/D CONVERTER (ADC)
11.5.1 Introduction
The on-chip Analog to Digital Converter (ADC) pe-
ripheral is a 10-bit, successive approximation con-
verter with internal sample and hold circuitry. This
peripheral has up to 7 multiplexed analog input
channels (refer to device pin out description) that
allow the peripheral to convert the analog voltage
levels from up to 7 different sources.
The result of the conversion is stored in a 10-bit
Data Register. The A/D converter is controlled
through a Control/Status Register.
11.5.2 Main Features
■ 10-bit conversion
■ Up to 7 channels with multiplexed input
■ Linear successive approximation
Figure 49. ADC Block Diagram
■ Data register (DR) which contains the results
■ Conversion complete status flag
■ On/off bit (to reduce consumption)
The block diagram is shown in Figure 49.
11.5.3 Functional Description
11.5.3.1 Analog Power Supply
VDDA and VSSA are the high and low level refer-
ence voltage pins. In some devices (refer to device
pin out description) they are internally connected
to the VDD and VSS pins.
Conversion accuracy may therefore be impacted
by voltage drops and noise in the event of heavily
loaded or badly decoupled power supply lines.
fCPU
DIV 2
0
1
DIV 4
1
0
SLOW
bit
fADC
EOC SPEED ADON 0
0 CH2 CH1 CH0 ADCCSR
3
AIN0
HOLD CONTROL
AIN1
ANALOG x 1 or
RADC
MUX
x8
ANALOG TO DIGITAL
CONVERTER
AINx
AMPSEL
bit
CADC
ADCDRH
D9 D8 D7 D6 D5 D4 D3 D2
ADCDRL
00
0
AMP
CAL
SLOW
AMP
SEL
D1
D0
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1
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