ST72T311J2T6 STMicroelectronics, ST72T311J2T6 Datasheet - Page 78

• Manufacturer Part Number: ST72T311J2T6
• Description: 8-bit Microcontrollers - MCU OTP EPROM 8K SPI/I2C
• Manufacturer: STMicroelectronics

Specifications of ST72T311J2T6

• Core: ST7
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 8 MHz
• Program Memory Size: 8 KB
• Data Ram Size: 384 B
• On-chip Adc: Yes
• Operating Supply Voltage: 3 V to 5.5 V
• Package / Case: TQFP-44
• Mounting Style: SMD/SMT
• A/d Bit Size: 8 bit
• A/d Channels Available: 6
• Interface Type: SCI, SPI
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Number Of Programmable I/os: 44
• Number Of Timers: 2
• On-chip Dac: No
• Program Memory Type: OTP EPROM
• Factory Pack Quantity: 160
• Supply Voltage - Max: 5.5 V
• Supply Voltage - Min: 3 V

ST72E311 ST72T311
5.6 8-BIT A/D CONVERTER (ADC)
5.6.1 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 8 multiplexed analog input
channels (refer to device pin out description) that
allow the peripheral to convert the analog voltage
levels from up to 8 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.
Figure 43. ADC Block Diagram
78/101
AIN3
AIN4
AIN5
AIN6
AIN7
AIN0
AIN1
AIN2
78
ANALOG
MUX
f
CPU
SAMPLE
HOLD
&
COCO
AD7
5.6.2 Main Features
The block diagram is shown in
8-bit conversion
Up to 8 channels with multiplexed input
Linear successive approximation
Data register (DR) which contains the results
Conversion complete status flag
On/Off bit (to reduce consumption)
AD6
-
ADON
AD5
ANALOG TO
DIGITAL
CONVERTER
(Control Status Register) CSR
AD4
0
AD3
(Data Register) DR
-
CH2
AD2
Figure
CH1
AD1
1.
CH0
AD0