AT89LP6440 datasheet(73/194 Pages) ATMEL

73 / 194 page

3706A–MICRO–9/09

AT89LP6440 - Preliminary

Notes:

1. All writes/reads to/from T2CCC will access channel X as currently selected by T2CCA.The control registers for the remain-

ing unselected channels are not accessible.

2. Analog Comparator A events are determined by the CMA2-0 bits in ACSRA. See Table 19-1 on page 130.

3. Analog Comparator B events are determined by the CMB2-0 bits in ACSRB. See Table 19-2 on page 131.

4. Asymmetrical versus Symmetrical PWM is determined by the Timer 2 Count Mode. See Section 13.4 on page 76.

Table 13-5.

T2CCC – Timer/Counter 2 Compare/Capture Control

T2CCC Address = 0D4H

Reset Value = 00X0 0000B

Not Bit Addressable

CIENx

CDIRx

–CTCx

CCMx

CxM2

CxM1

CxM0

Bit

654

321

Symbol

Function

CIENx

Channel X Interrupt Enable. When set, channel X’s interrupt flag, CCFx in T2CCF, will generate an interrupt when ECC

= 1. Clear to disable interrupts from channel X.

CDIRx

Channel X Capture Direction. In dual-slope modes, a compare/capture event on channel X will store the current count

direction into CDIRx. Up-counting = 0 and down-counting = 1. Modifying this bit has no effect.

CTCx

Clear Timer on Compare/Capture of Channel X. When set, the Timer 2 registers TL2 and TH2 will be cleared by a

compare/capture event on channel X. When cleared, Timer 2 is unaffected by channel X events.

CCMx

Channel X Compare/Capture Mode. When CCMx = 1, channel X operates in compare mode. When CCMx = 0, channel

X operates in capture mode.

CxM[2-0]

Channel X Mode. Selects the output/input events for compare/capture channel X.

CxM2

CxM1

CxM0

Capture Event (CCMx = 0)

000Disabled

001Trigger on negative edge of CCx pin

010Trigger on positive edge of CCx pin

011Trigger on either edge of CCx pin

100Trigger on Timer 0 overflow

101Trigger on Timer 1 overflow

110Trigger on Analog Comparator A Event(2)

111Trigger on Analog Comparator B Event(3)

CxM2

CxM1

CxM0

Compare Action (CCMx = 1)

000Output disabled (interrupt only)

001

Set CCx pin on compare match

010Clear CCx pin on compare match

011Toggle CCx pin on compare match

100Inverting Pulse Width Modulation(4)

101Non-Inverting Pulse Width Modulation(4)

110Reserved

111Reserved

AT89LP6440 Datasheet(PDF) 73 Page - ATMEL Corporation

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