AT89LP428 datasheet(49/149 Pages) ATMEL

tên linh kiện	AT89LP428

Giải thích chi tiết về linh kiện	8-bit Microcontroller with 4K/8K Bytes In-System Programmable Flash

PDF	149 Pages

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nhà sản xuất	ATMEL [ATMEL Corporation]

Trang chủ	http://www.atmel.com

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3654A–MICRO–8/09

AT89LP428/828

Figure 11-7. Timer/Counter 1 PWM Mode 1

11.5.3

Mode 2 – 8-bit Frequency Generator

Timer 0 in PWM mode 2 functions as an 8-bit Auto-reload timer, the same as normal Mode 2,

with the exception that the output pin T0 is toggled at every TL0 overflow (see Figure 11-8 and

Figure 11-9 on page 50). Timer 1 in PWM mode 2 is identical to Timer 0. PWM mode 2 can be

used to output a square wave of varying frequency. THx acts as an 8-bit counter. The following

formula gives the output frequency for Timer 0 in PWM mode 2.

Figure 11-8. Timer/Counter 1 PWM Mode 2

Note:

{RH0 & RL0}/{RH1 & RL1} are not required by Timer 0/Timer 1 during PWM mode 2 and may be

used as temporary storage registers.

OSC

TR1

GATE

INT1 Pin

TL1

(8 Bits)

Control

TH1

(8 Bits)

OCR1

RH1

(8 Bits)

RL1

(8 Bits)

÷TPS

Mode 2:

OUT

Oscillator Frequency

2256

TH0

–

()

-------------------------------------------------------

TPS

---------------------

OSC

TR1

GATE

INT1 Pin

TL1

(8 Bits)

Control

TH1

(8 Bits)

÷TPS

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