VNF9D5F datasheet(63/108 Pages) STMICROELECTRONICS

63 / 108 page

Figure 32. One timer step actions

count = n-1

update register

IF (timer = END) then

reset flag

goto Latch_OFF

END

step A

- t -

wait

step A + 1

IF NOT (event) then

reset flag

stop down-counting

ELSE

continue

END

one down counting step

one timer step

6.2

Blanking window values

The range of the configurable blanking window is shown in Table 43.

•

0x0: it configures the channel in Latch-OFF mode in case of event without blanking time. Consequently, the

channel will latch-off upon the first occurrence of power limitation or overtemperature event.

•

0x1 to 0xF: this value represents the time duration; it will be written by MCU in the register (Latch-Off timer

before latching off if the “event” is still active or present.

The minimum value of the timer, known as Zero, is 0x0F. When the timer reaches this value, the latch-off action

will be triggered.

The following table shows the time values written by the MCU and their real value in the Timer Register.

Table 43. Blanking window values configurations

Bit 7 or bit 3

Bit 6 or bit 2

Bit 5 or bit 1

Bit 4 or bit 0

0xm

0xmF

Typical value of blanking time

0x0

0xF

Latch-OFF (ZERO)

0x1

0x1F

16 ms

0x2

0x2F

32 ms

0x3

0x3F

48 ms

...

0x4

0x4F

64 ms

...

0xE

0xEF

224 ms

0xF

0xFF

240 ms

VNF9D5F

Programmable blanking window (PBW)

DS13946 - Rev 8

page 63/108

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