ST7LITE49K2 datasheet(179/245 Pages) STMICROELECTRONICS

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ST7LITE49K2

On-chip peripherals

179/245

Figure 82.

Analog comparator

11.8.4

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.

0: External reference voltage not connected to VN

1: External reference voltage connected to VN

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.

0: Bandgap voltage not connected to VN

1: Bandgap voltage connected to VN

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 Table 59.

CMPON

COUT

CMP

CMPIE

CMPIF

CINV

CHYST

CMPxCR

Rising Edge

Falling Edge

Comparator Interrupt

COMPOUTx

CINV

Comparator

CMPx

COMPx

VCEXT

VCBGR

VR3

VR2

VR1

VR0

VCEXTB

Read/Write

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