T89C5115-RATIM datasheet(76/113 Pages) ATMEL

номер детали	T89C5115-RATIM

подробное описание детали	Low Pin Countl 8-bit Microcontroller with A/D Converter and 16 KBytes Flash Memory

PDF	113 Pages

Scroll/Zoom	100%

производитель	ATMEL [ATMEL Corporation]

домашняя страница	http://www.atmel.com

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AT89C5115

4128F–8051–05/06

High Speed Output Mode In this mode the CEX output (on port 1) associated with the PCA module will toggle

each time a match occurs between the PCA counter and the module’s capture registers.

To activate this mode the TOG, MAT, and ECOM bits in the module’s CCAPMn SFR

must be set.

Figure 36. PCA High Speed Output Mode

Pulse Width Modulator

Mode

All the PCA modules can be used as PWM outputs. The output frequency depends on

the source for the PCA timer. All the modules will have the same output frequency

because they all share the PCA timer. The duty cycle of each module is independently

variable using the module’s capture register CCAPLn. When the value of the PCA CL

SFR is less than the value in the module’s CCAPLn SFR the output will be low, when it

is equal to or greater than it, the output will be high. When CL overflows from FF to 00,

CCAPLn is reloaded with the value in CCAPHn. the allows the PWM to be updated with-

out glitches. The PWM and ECOM bits in the module’s CCAPMn register must be set to

enable the PWM mode.

CCAPnH

CCAPnL

ECOMn

CCAPMn, n = 0 to 1

0xDA to 0xDE

CAPNn MATn TOGn PWMn ECCFn

CAPPn

16 bit comparator

Match

CCON

0xD8

CCF1

CCF0

PCA IT

Enable

CEXn

PCA counter/timer

“1”

“0”

Write to

CCAPnL

Reset

Write to

CCAPnH

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