AT87C5103-ICSIL datasheet(40/64 Pages) ATMEL

40 / 64 page

AT8xC5103

4134C–8051–09/04

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

Table 24. CCAPMn: PCA Modules Compare/Capture Control Registers

Table 25. PCA Module Modes (CCAPMn Registers)

CCAPMn

Address

n = 0 - 4

CCAPM0 (0DAH)

CCAPM1 (0DBH)

CCAPM2 (0DCH)

CCAPM3 (0DDH)

CCAPM4 (0DEH)

ECOMn CAPPn CAPNn MATn

TOGn

PWMm

ECCFn

Reset value

000

Symbol

Function

Not implemented, reserved for future use. (1)

User software should not write 1s to reserved bits. These bits may be used in future 8051

family products to invoke new features. In that case, the reset or inactive value of the

new bit will be 0, and its active value will be 1. The value read from a reserved bit is

indeterminate.

ECOMn

Enable Comparator. ECOMn = 1 enables the comparator function.

CAPPn

Capture Positive, CAPPn = 1 enables positive edge capture.

CAPNn

Capture Negative, CAPNn = 1 enables negative edge capture.

MATn

Match. When MATn = 1, a match of the PCA counter with this module's compare/capture

TOGn

Toggle. When TOGn = 1, a match of the PCA counter with this module's compare/capture

PWMn

Pulse Width Modulation Mode. PWMn = 1 enables the CEXn pin to be used as a pulse

width modulated output.

ECCFn

Enable CCF interrupt. Enables compare/capture flag CCFn in the CCON register to

generate an interrupt.

ECOMn CAPPn CAPNn

MATn

TOGn

PWMm ECCFn Module Function

0000000

No Operation

10000

16-bit capture by a positive-edge

trigger on CEXn

01000

16-bit capture by a negative trigger

on CEXn

11000

16-bit capture by a transition on

CEXn

100100

16-bit Software Timer/Compare

mode.

100110

16-bit High Speed Output

1000010

8-bit PWM

1001

Watchdog Timer (module 4 only)

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