AT89LP6440 datasheet(132/194 Pages) ATMEL

Part #	AT89LP6440

Description	8-bit Microcontroller with 64K Bytes In-System Programmable Flash

PDF	194 Pages

Scroll/Zoom	100%

Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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132 / 194 page

132

3706A–MICRO–9/09

AT89LP6440 - Preliminary

Notes:1. CONB (ACSRB.5) must be cleared to 0 before changing RFB[1-0].

2. CONA (ACSRA.5) must be cleared to 0 before changing RFA[1-0].

Table 19-3.

AREF

– Analog Comparator Reference Control Register

AREF = AFH

Reset Value = 0000 0000B

Not Bit Addressable

CBC1

CBC0

RFB1

RFB0

CAC1

CAC0

RFA1

RFA0

Bit

543

Symbol

Function

CSC [1-0]

Comparator B Clock Select

CBC1

CBC0

Clock Source

System Clock

Timer 0 Overflow

Timer 1 Overflow

Timer 2 Overflow

RFB [1-0]

Comparator B Negative Input Channel Select(1)

CRF1

RFB0

B- Channel

AIN2 (P2.6)

Internal V

AREF-

Δ (~1.125V)

Internal VAREF (~1.25V)

Internal VAREF+Δ (~1.375V)

CAC [1-0]

Comparator A Clock Select

CAC1

CAC0

Clock Source

System Clock

Timer 0 Overflow

Timer 1 Overflow

Timer 2 Overflow

RFA [1-0]

Comparator A Negative Input Channel Select(2)

RFA1

RFA0

A- Channel

AIN1 (P2.5)

Internal V

AREF-

Δ (~1.125V)

Internal VAREF (~1.25V)

Internal V

AREF+

Δ (~1.375V)

AT89LP6440 Datasheet(PDF) 132 Page - ATMEL Corporation

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