ST72F63 STMICROELECTRONICS [STMicroelectronics], ST72F63 Datasheet - Page 86

• Manufacturer Part Number: ST72F63
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

ST7263B
11.6 8-BIT A/D CONVERTER (ADC)
11.6.1 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.
11.6.2 Main Features
The block diagram is shown in
Figure 43. ADC Block Diagram
86/132
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
43.
R
f
CPU
ADC
ADCDR
0
CH3
CH2
HOLD CONTROL
D7
11.6.3 Functional Description
11.6.3.1 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