ST7LITE25F2 datasheet(77/166 Pages) STMICROELECTRONICS

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ST7LITE20F2 ST7LITE25F2 ST7LITE29F2

On-chip peripherals

Doc ID 8349 Rev 5

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Software can set the BA bit to activate the break function without using the BREAK pin.

●

When the break function is activated (BA bit =1):

–

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

output pins (after the inverter),

–

the 12-bit PWM counter is set to its reset value,

–

the ARR, DCRx and the corresponding shadow registers are set to their reset

values,

–

the PWMCR register is reset.

●

When the break function is deactivated after applying the break (BA bit goes from 1 to

0 by software):

–

the control of PWM outputs is transferred to the port registers.

Figure 38. Block diagram of break function

Note:

The BREAK pin value is latched by the BA bit.

Input capture

The 12-bit ATICR register is used to latch the value of the 12-bit free running upcounter after

a rising or falling edge is detected on the ATIC pin.

When an input capture occurs, the ICF bit is set and the ATICR register contains the value of

the free running upcounter. An IC interrupt is generated if the ICIE bit is set. The ICF bit is

reset by reading the ATICR register when the ICF bit is set. The ATICR is a read only

most recent input capture. Any further input capture is inhibited while the ICF bit is set.

PWM0

PWM1

PWM2

PWM3

PWM0

PWM1

PWM2

PWM3

BREAKCR register

BREAK pin

PWM counter -> Reset value

ARR & DCRx -> Reset value

PWM Mode -> Reset value

When BA is set:

(Active low)

(Inverters)

PWM0

PWM1

PWM2

PWM3

BPEN

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