ST7LITE49K2 datasheet(90/245 Pages) STMICROELECTRONICS

90 / 245 page

On-chip peripherals

ST7LITE49K2

90/245

When a break function is activated (BAx bit =1 and BREN1/BREN2 =1):

●

The break pattern (PWM[3:0] bits in the BREAKCR1) is forced directly on the PWMx

output pins if respective OEx is set. (after the inverter).

●

The 12-bit PWM counter CNTR1 is put to its reset value, i.e. 00h (if BREN1 = 1).

●

The 12-bit PWM counter CNTR2 is put to its reset value,i.e. 00h (if BREN2 = 1).

●

ATR1, ATR2, Preload and Active DCRx are put to their reset values.

●

Counters stop counting.

When the break function is deactivated after applying the break (BAx bit go from 1 to 0 by

software), Timer takes the control of PWM ports.

Figure 43.

ST7LITE49K2 block diagram of break function

Output compare mode

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

PWM0

PWM1

PWM2

PWM3

PWM0

PWM1

PWM2

PWM3

BREAKCR1 register

BREAK1 pin

(Inverters)

PWM0

PWM1

PWM2

PWM3

BP1EN

BA1

Level

Selection

BR1SEL

ENCNTR2 bit

BREN1 bit

PWM0/1 Break Enable

PWM2/3 Break Enable

OEx

BR1EDGE

Comparator1

BREAKCR2 register

SWBR1

SWBR2

BP2EN

BA2

BR2SEL BR2EDGE

BREAK2 pin

Comparator2

Level

Selection

BREN2 bit

ST7LITE49K2 Datasheet(PDF) 90 Page - STMicroelectronics

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