ST7LITE49K2 STMicroelectronics, ST7LITE49K2 Datasheet - Page 178

• 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

On-chip peripherals
11.8.3
178/245
Functional description
To make an analog comparison, the CMPON bit in the CMPxCR register must be set to
power-on the comparator and internal voltage reference module.
The VP comparator A input is mapped on PC6 and the VP comparator B input is mapped on
PC5. The VN comparator A input is mapped on PA0 and the VN comparator B input is
mapped on PC4.
The internal voltage reference can provide a range of different voltages to the comparator
VN input, selected by several bits in the VREFCR register, as described in
page
The comparator A output is connected to pin PC7 and the comparator B output is connected
to pin PB5 when the COUT bit in the CMPxCR register is set.
The comparator output is also connected internally to the break function of the 12-bit
Autoreload Timer (refer to
When the Comparator is OFF, the output value of comparator is ‘1’.
Important note: To avoid spurious toggling of the output of the comparator due to noise on
the voltage reference, it is recommended to enable the hysteresis through the CHYST bit in
the CMPxCR register.
Figure 81. Analog comparator and internal voltage reference
COMPINA+
COMPINB+
COMPINB-
COMPINA-
180.
1.2V Bandgap
Voltage Reference
Section 11.2: Dual 12-bit autoreload timer on page
VCEXT bit
VCBGR bit
VR[3:0] bits
4
0
1
VP
VN
VCEXTB bit
Comparator
+
-
VP
VN
Comparator
+
-
Break 1 input
to 12-bit
Break 2 input
to 12-bit Autoreload Timer
COMPA
Autoreload Timer
Table 59 on
ST7LITE49K2
84)
COMPB