AT89C5115-RATUM datasheet(74/113 Pages) ATMEL

部件名	AT89C5115-RATUM

功能描述	Low Pin Countl 8-bit Microcontroller with A/D Converter and 16 KBytes Flash Memory

PDF	113 Pages

Scroll/Zoom	100%

制造商	ATMEL [ATMEL Corporation]

网页	http://www.atmel.com

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74 / 113 page

AT89C5115

4128F–8051–05/06

PCA Interrupt

Figure 33. PCA Interrupt System

PCA Capture Mode

To use one of the PCA modules in 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 reg-

isters (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.

Figure 34. PCA Capture Mode

CCON

0xD8

CCF1

CCF0

Module 1

Module 0

PCA Timer/Counter

To Interrupt

IEN0.6

IEN0.7

ECF

CMOD.0

ECCFn

CCAPMn.0

CEXn

n = 0, 1

PCA Counter

(8-bits)

CCAPnH CCAPnL

CCFn

CCON Reg

PCA

Interrupt

Request

0CAPPnCAPNn000ECCFn

CCAPMn Register (n = 0, 1)

AT89C5115-RATUM 数据表(PDF) 74 Page - ATMEL Corporation

AT89C5115-RATUM 数据表(HTML) 74 Page - ATMEL Corporation

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