TS87C51RC2-ECKB View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

TS87C51RC2-ECKB

High Performance 8-bit Microcontrollers

Atmel Corporation 

TS80C51RA2/RD2

TS83C51RB2/RC2/RD2

TS87C51RB2/RC2/RD2

6.5.1. PCA Capture Mode

To use one of the PCA modules in the capture mode either one or both of the CCAPM bits CAPN and CAPP

for that module must be set. The external CEX input for the module (on port 1) is sampled for a transition.

When a valid transition occurs the PCA hardware loads the value of the PCA counter registers (CH and CL)

into the module's capture registers (CCAPnL and CCAPnH). If the CCFn bit for the module in the CCON

SFR and the ECCFn bit in the CCAPMn SFR are set then an interrupt will be generated (Refer to Figure 9).

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 to 4

0xDA to 0xDE

Figure 9. PCA Capture Mode

30

Rev. C - 06 March, 2001

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