ST7LITE20F2 datasheet(76/166 Pages) STMICROELECTRONICS

Part #	ST7LITE20F2

Description	8-bit microcontroller with single voltage Flash memory, data EEPROM, ADC, Timers, SPI

PDF	166 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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76 / 166 page

On-chip peripherals

ST7LITE20F2 ST7LITE25F2 ST7LITE29F2

76/166

Doc ID 8349 Rev 5

Figure 36. PWM function

Figure 37. PWM signal from 0% to 100% duty cycle

Output compare mode

To use this function, load a 12-bit value in the DCRxH and DCRxL registers.

When the 12-bit upcounter (CNTR) reaches the value stored in the DCRxH and DCRxL

registers, the CMPF bit in the PWMxCSR register is set and an interrupt request is

generated if the CMPIE bit is set.

Note:

The output compare function is only available for DCRx values other than 0 (reset value).

Break function

The break function is used to perform an emergency shutdown of the power converter.

The break function is activated by the external BREAK pin (active low). In order to use the

BREAK pin it must be previously enabled by software setting the BPEN bit in the BREAKCR

When a low level is detected on the BREAK pin, the BA bit is set and the break function is

activated.

Duty cycle

Auto-reload

4095

000

With OE=1

and OPx=0

(ATR)

(DCRx)

With OE=1

and OPx=1

COUNTER

FFDh

FFEh

FFFh

FFDh

FFEh

FFFh

FFDh

FFEh

DCRx=000h

DCRx=FFDh

DCRx=FFEh

DCRx=000h

ATR= FFDh

fCOUNTER

ST7LITE20F2 Datasheet(PDF) 76 Page - STMicroelectronics

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