Atmel C51 Arkusz Danych Pobierz pdf (Strona 36)

AT89C51RB2/RC2

4180E–8051–10/06

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

76543210

- 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.

5 CAPPn

Capture Positive

Cleared to disable positive edge capture.

Set to enable positive edge capture.

4 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.

2 TOGn

Toggle

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

compare/capture register causes theCEXn 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.

0 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.

1 2 ... 31 32 33 34 35 36 37 38 39 40 41 ... 126 127

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