ST7LITE49K2 STMicroelectronics, ST7LITE49K2 Datasheet - Page 179

• 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
11.8.4
Figure 82. Analog comparator
Register description
Internal voltage reference register (VREFCR)
Reset Value: 0000 0000 (00h)
Bit 7 = VCEXT External voltage reference for comparators
This bit is set or cleared by software. It is used to connect the external reference voltage to
the VN comparator inputs.
Bit 6 = VCBGR Bandgap voltage for comparators
This bit is set or cleared by software. It is used to connect the bandgap voltage of 1.2V to the
VN comparator inputs.
Bits 5:2 = VR[3:0] Programmable internal voltage reference range selection
These bits are set or cleared by software. They are used to select one of 16 different
voltages available from the internal voltage reference module and connect it to the VN
comparator inputs.
Refer to
VCEXT
0: External reference voltage not connected to VN
1: External reference voltage connected to VN
0: Bandgap voltage not connected to VN
1: Bandgap voltage connected to VN
7
Table
Comparator
+
-
CMPxCR
CHYST
VCBGR
59.
Falling Edge
Rising Edge
0
COMPx
CINV
VR3
CINV
CMPIF
0
1
CMPx
CMPIE
VR2
Read/Write
CMP
COUT
VR1
CMPON
Comparator Interrupt
VR0
COMPOUTx
VCEXTB
On-chip peripherals
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0
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