ST7DALIF2 STMicroelectronics, ST7DALIF2 Datasheet - Page 115

• Manufacturer Part Number: ST7DALIF2
• Description: 8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, TIMERS, SPI
• Manufacturer: STMicroelectronics

Specifications of ST7DALIF2

• 8 Kbytes Single Voltage Flash Program Memory With Read-out Protection, In-circuit Programming And In-application Programming (icp And Iap). 10k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55°C.
• 256 Bytes Data Eeprom With Read-out Protection. 300k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55°C.
• Clock Sources: Internal 1% RC oscillator, crystal/ceramic resonator or external clock
• Five Power Saving Modes: Halt, Active-Halt, Wait and Slow, Auto Wake Up From Halt

ST7DALIF2
18.3.4
18.4
18.5
Note:
R
is too high, this will result in a loss of accuracy due to leakage and sampling not being
completed in the alloted time.
A/D conversion
The analog input ports must be configured as input, no pull-up, no interrupt. Refer to
Section 12: I/O ports on page
ability of the port to be read as a logic input.
In the ADCCSR register:
ADC conversion mode
In the ADCCSR register:
●
When a conversion is complete:
●
●
A read to the ADCDRH or a write to any bit of the ADCCSR register resets the EOC bit.
To read the 10 bits, perform the following steps:
1.
2.
3.
To read only 8 bits, perform the following steps:
1.
2.
Changing the conversion channel
The application can change channels during conversion.
When software modifies the CH[3:0] bits in the ADCCSR register, the current conversion is
stopped, the EOC bit is cleared, and the A/D converter starts converting the newly selected
channel.
Low power modes
The A/D converter may be disabled by resetting the ADON bit. This feature allows reduced
power consumption when no conversion is needed and between single shot conversions.
AIN
– Select the CS[2:0] bits to assign the analog channel to convert.
Set the ADON bit to enable the A/D converter and to start the conversion. From this
time on, the ADC performs a continuous conversion of the selected channel.
The EOC bit is set by hardware.
The result is in the ADCDR registers.
Poll EOC bit
Read ADCDRL
Read ADCDRH. This clears EOC automatically.
Poll EOC bit
Read ADCDRH. This clears EOC automatically.
is the maximum recommended impedance for an analog input signal. If the impedance
61. Using these pins as analog inputs does not affect the
10-bit A/D converter (ADC)
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