AT89C51ED2-RDTIM datasheet(41/137 Pages) ATMEL

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AT89C51RD2/ED2

4235E–8051–04/04

Table 24 shows the CCAPMn settings for the various PCA functions.

Table 24. CCAPMn Registers (n = 0-4)

CCAPM0 - PCA Module 0 Compare/Capture Control Register (0DAh)

CCAPM1 - PCA Module 1 Compare/Capture Control Register (0DBh)

CCAPM2 - PCA Module 2 Compare/Capture Control Register (0DCh)

CCAPM3 - PCA Module 3 Compare/Capture Control Register (0DDh)

CCAPM4 - PCA Module 4 Compare/Capture Control Register (0DEh)

Reset Value = X000 0000b

Not bit addressable

ECOMn

CAPPn

CAPNn

MATn

TOGn

PWMn

ECCFn

Bit

Number

Bit

Mnemonic

Description

Reserved

The value read from this bit is indeterminate. Do not set this bit.

6ECOMn

Enable Comparator

Cleared to disable the comparator function.

Set to enable the comparator function.

CAPPn

Capture Positive

Cleared to disable positive edge capture.

Set to enable positive edge capture.

CAPNn

Capture Negative

Cleared to disable negative edge capture.

Set to enable negative edge capture.

3MATn

Match

When MATn = 1, a match of the PCA counter with this module's

compare/capture register causes the CCFn bit in CCON to be set, flagging an

interrupt.

TOGn

Toggle

When TOGn = 1, a match of the PCA counter with this module's

compare/capture register causes the CEXn pin to toggle.

1PWMn

Pulse Width Modulation Mode

Cleared to disable the CEXn pin to be used as a pulse width modulated output.

Set to enable the CEXn pin to be used as a pulse width modulated output.

CCF0

Enable CCF interrupt

Cleared to disable compare/capture flag CCFn in the CCON register to generate

an interrupt.

Set to enable compare/capture flag CCFn in the CCON register to generate an

interrupt.

AT89C51ED2-RDTIM 数据表(PDF) 41 Page - ATMEL Corporation

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