ST7FLITE29 STMICROELECTRONICS [STMicroelectronics], ST7FLITE29 Datasheet - Page 81

• Manufacturer Part Number: ST7FLITE29
• Description: 8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, TIMERS, SPI
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

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
Figure 49. ADC Block Diagram
10-bit conversion
Up to 7 channels with multiplexed input
Linear successive approximation
AIN0
AINx
AIN1
f
CPU
ANALOG
DIV 2
MUX
EOC SPEED ADON
3
ADCDRH
0
1
AMPSEL
x 1 or
x 8
bit
DIV 4
0
R
ADCDRL
ADC
D9
0
CH2
D8
SLOW
The block diagram is shown in
11.5.3 Functional Description
11.5.3.1 Analog Power Supply
V
ence voltage pins. In some devices (refer to device
pin out description) they are internally connected
to the V
Conversion accuracy may therefore be impacted
by voltage drops and noise in the event of heavily
loaded or badly decoupled power supply lines.
bit
1
0
CH1
D7
HOLD CONTROL
DDA
Data register (DR) which contains the results
Conversion complete status flag
On/off bit (to reduce consumption)
0
CH0
and V
D6
DD
0
f
C
ADC
and V
D5
ADC
ADCCSR
SSA
0
D4
are the high and low level refer-
SS
AMP
CAL
ANALOG TO DIGITAL
pins.
D3
SLOW
CONVERTER
D2
AMP
SEL
Figure
D1
49.
ST7LITE2
D0
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