ST72651AR6 STMicroelectronics, ST72651AR6 Datasheet - Page 114
ST72651AR6
Manufacturer Part Number
ST72651AR6
Description
LOW-POWER, FULL-SPEED USB 8-BIT MCU WITH 32K FLASH, 5K RAM, FLASH CARD I/F, TIMER, PWM, ADC, I2C, SPI
Manufacturer
STMicroelectronics
Datasheet
1.ST72651AR6.pdf
(161 pages)
Specifications of ST72651AR6
Dual Supply Management
analog voltage detector on the USB power line to enable smart power switching from USB power to battery (on E suffix devices).
Programmable Internal Voltage Regulator For Memory Cards (2.8v To 3.5v) Supplying
Flash Card I/O lines (voltage shifting)
5 Usb Endpoints
1 control endpoint
Dtc (data Transfer Coprocessor)
Universal Serial/Parallel communications interface, with software plug-ins for current and future protocol standards
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ST72651AR6
11.8 8-BIT A/D CONVERTER (ADC)
11.8.1 Introduction
The on-chip Analog to Digital Converter (ADC) pe-
ripheral is a 8-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 8-bit
Data Register. The A/D converter is controlled
through a Control/Status Register.
11.8.2 Main Features
■
■
■
■
■
■
The block diagram is shown in
Figure 66. ADC Block Diagram
114/161
8-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)
AIN0
AINx
AIN1
COCO
ANALOG
MUX
0
Figure
ADON
4
66.
R
f
CPU
ADC
ADCDR
0
Doc ID 7215 Rev 4
CH3
CH2
D7
HOLD CONTROL
11.8.3 Functional Description
11.8.3.1 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.
See electrical characteristics section for more de-
tails.
CH1
DDA
DIV 4
D6
CH0
and V
C
DD
D5
ADC
and V
ADCCSR
SSA
D4
are the high and low level refer-
SS
ANALOG TO DIGITAL
D3
pins.
f
ADC
CONVERTER
D2
D1
D0
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