ST72264G2 STMicroelectronics, ST72264G2 Datasheet - Page 116

• Manufacturer Part Number: ST72264G2
• Description: 8-bit MCU
• Manufacturer: STMicroelectronics

Specifications of ST72264G2

• 4 K Or 8 Kbytes Program Memory: ROM or single voltage extended Flash (XFlash) with read-out protection, write protection, In-Circuit Programming and In-Application Programming (ICP and IAP). 10K write/erase cycles guaranteed, data retention
• Clock Sources: crystal/ceramic resonator oscillators, internal RC oscillator and bypass for external clock
• 4 Power Saving Modes: Halt, Active Halt,Wait and Slow
• Two 16-bit Timers With: 2 input captures, 2 output compares, external clock input on one timer, PWM and Pulse generator modes

ST72260Gx, ST72262Gx, ST72264Gx
11.7 10-BIT A/D CONVERTER (ADC)
11.7.1 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 6 multiplexed analog input chan-
nels (refer to device pin out description) that allow
the peripheral to convert the analog voltage levels
from 6 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.
11.7.2 Main Features
■
■
■
Figure 61. ADC Block Diagram
116/172
10-bit conversion
6 channels with multiplexed input
Linear successive approximation
AIN0
AINx
AIN1
f
CPU
ANALOG
MUX
EOC SPEED ADON SLOW
f
CPU,
3
ADCDRH
f
CPU
/2
,
f
CPU
ADCDRL
/4
D9
0
f
ADC
CH2
D8
■
■
■
The block diagram is shown in
11.7.3 Functional Description
11.7.3.1 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.
CH1
D7
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
and V
D5
ADCCSR
SSA
0
D4
are the high and low level refer-
SS
0
ANALOG TO DIGITAL
pins.
D3
CONVERTER
0
D2
0
Figure
D1
61.
D0