ST72521 STMICROELECTRONICS [STMicroelectronics], ST72521 Datasheet - Page 152

• Manufacturer Part Number: ST72521
• Description: 8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, FIVE TIMERS, SPI, SCI, I2C, CAN INTERFACE
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

ST72521
10.9 10-BIT A/D CONVERTER (ADC)
10.9.1 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 16 multiplexed analog input
channels (refer to device pin out description) that
allow the peripheral to convert the analog voltage
levels from up to 16 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.
Figure 81. ADC Block Diagram
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f
CPU
AIN0
AINx
AIN1
DIV 2
DIV 4
ANALOG
MUX
EOC SPEED ADON
4
ADCDRH
0
1
f
ADC
0
ADCDRL
CH3
D9
CH2
D8
10.9.2 Main Features
The block diagram is shown in
CH1
D7
10-bit conversion
Up to 16 channels with multiplexed input
Linear successive approximation
Data register (DR) which contains the results
Conversion complete status flag
On/off bit (to reduce consumption)
0
CH0
D6
0
D5
ADCCSR
0
D4
0
ANALOG TO DIGITAL
D3
CONVERTER
0
D2
0
Figure
D1
81.
D0