AT80C51RA2 データシートの表示（PDF） - Atmel Corporation

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AT80C51RA2

High Performance 8-bit Microcontrollers

Atmel Corporation 

Figure 6-6. PCA Capture Mode

CF CR

CCF4

CCF3

CCF2

CCF1

CCF0

CCON

0xD8

PCA IT

Cex.n

Capture

PCA Counter/Timer

CH

CL

CCAPnH

CCAPnL

ECOMn CAPPn CAPNn MATn

TOGn

PWMn

ECCFn

CCAPMn, n= 0

0xDA to 0xDE

to

4

6.3.2

16-bit Software Timer/ Compare Mode

The PCA modules can be used as software timers by setting both the ECOM and MAT bits in

the modules CCAPMn register. The PCA timer will be compared to the module's capture regis-

ters and when a match occurs an interrupt will occur if the CCFn (CCON SFR) and the ECCFn

(CCAPMn SFR) bits for the module are both set (See Figure 6-7).

30 AT/TS8xC51Rx2

4188F–8051–01/08

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