ST7LITE49K2 STMicroelectronics, ST7LITE49K2 Datasheet - Page 177

• Manufacturer Part Number: ST7LITE49K2
• Description: 8-bit MCU
• Manufacturer: STMicroelectronics

Specifications of ST7LITE49K2

• 8 Kbytes Single Voltage Extended Flash (xflash) Program Memory With Read-out Protection In-circuit Programming And In-application Programming (icp And Iap) Endurance: 10K write/erase cycles guaranteed Data retention
• 256 Bytes Data Eeprom With Read-out Protection. 300k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55 °C.
• Clock Sources: Internal trimmable 8 MHz RC oscillator, auto-wakeup internal low power - low frequency oscillator, crystal/ceramic resonator or external clock
• Five Power Saving Modes: Halt, Active-halt, Auto-wakeup from Halt, Wait and Slow

ST7LITE49K2
11.8
11.8.1
11.8.2
Note:
Analog comparator (CMP)
Introduction
The CMP block consists of two analog comparators (CMPA and CMPB) and an internal
voltage reference. The voltage reference can be external or internal, selectable under
program control. The comparator input pins COMPIN+ and COMPIN- are also connected to
the A/D converter (ADC).
Main features
On-chip analog comparators
The analog comparator compares the voltage at two input pins COMPIN+ and COMPIN-
which are connected to VP and VN at the comparator input. When the analog input at
COMPIN+ is less than the analog input at COMPIN-, the output of the comparator is 0.
When the analog input at COMPIN+ is greater than the analog input at COMPIN-, the output
of the comparator is 1.
The result of the comparison as 0 or 1 at COMPOUT is shown in
To obtain a stable result, the comparator requires a stabilization time of 500 ns. Please refer
to
Table 58.
Programmable external/internal voltage reference
The voltage reference module can be configured to connect the comparator pin COMPIN- to
one of the following:
●
●
●
1.
2.
3.
Section 13: Electrical characteristics on page
Fixed internal voltage bandgap
Programmable internal reference voltage
External voltage reference
Fixed Internal Voltage Bandgap
The voltage reference module can generate a fixed voltage reference of 1.2V on the VN
input. This is done by setting the VCBGR bit in the VREFCR register.
Programmable Internal Voltage Reference
The internal voltage reference module can provide 16 distinct internally generated
voltage levels from 3.2V to 0.2V each at a step of 0.2V on comparator pin VN. The
voltage is selected through the VR[3:0] bits in the VREFCR register.
External Reference Voltage
If a reference voltage other than that generated by the internal voltage reference
module is required, COMPIN- can be connected to an external voltage source. This
configuration can be selected by setting the VCEXT bit in the VREFCR register.
CINV
0
1
Comparison result
Input conditions
VP > VN
VN > VP
VP > VN
VN > VP
192.
Figure 82 on page
COMPOUT
On-chip peripherals
1
0
0
1
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