ST7DALIF2 STMicroelectronics, ST7DALIF2 Datasheet - Page 114

• 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

10-bit A/D converter (ADC)
18.3.2
18.3.3
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Figure 52. ADC block diagram
Input voltage amplifier
The input voltage can be amplified by a factor of 8 by enabling the AMPSEL bit in the
ADCDRL register.
When the amplifier is enabled, the input range is 0V to V
For example, if V
an ideal resolution of 0.6mV (equivalent to 13-bit resolution with reference to a V
range).
For more details, refer to the Electrical characteristics section.
Note: The amplifier is switched on by the ADON bit in the ADCCSR register, so no
additional startup time is required when the amplifier is selected by the AMPSEL bit.
Digital A/D conversion result
The conversion is monotonic, meaning that the result never decreases if the analog input
does not and never increases if the analog input does not.
If the input voltage (V
conversion result is FFh in the ADCDRH register and 03h in the ADCDRL register (without
overflow indication).
If the input voltage (V
conversion result in the ADCDRH and ADCDRL registers is 00 00h.
The A/D converter is linear and the digital result of the conversion is stored in the ADCDRH
and ADCDRL registers. The accuracy of the conversion is described in the Electrical
Characteristics Section.
AIN0
AIN1
AINx
f
CPU
ANALOG
DIV 2
DD
MUX
EOC SPEED ADON
= 5V, then the ADC can convert voltages in the range 0V to 430mV with
AIN
AIN
3
ADCDRH
) is greater than V
) is lower than V
0
1
AMPSEL
x 1 or
x 8
bit
DIV 4
0
R
ADCDRL
ADC
D9
0
CH2
D8
SSA
SLOW
DDA
bit
1
0
CH1
D7
HOLD CONTROL
(low-level voltage reference) then the
(high-level voltage reference) then the
0
CH0
D6
0
f
C
ADC
ADC
D5
ADCCSR
0
DD
D4
AMP
CAL
/8.
ANALOG TO DIGITAL
D3
SLOW
CONVERTER
D2
AMP
SEL
D1
D0
ST7DALIF2
SS
to V
DD