Datasheet

30129716
FIGURE 11. Pulse Width Adjustment (00h[21:20] = “10”)
In the case where Pulse Width Adjustment is enabled and a
Fire Delay Profile is programmed, the total output delay rela-
tive to the TX_EN signal for the Pulse Width Adjusted output
is [the internal propagation delay] + [the programmed delay
value] + [pulse width adjustment value] and the total output
delay for the other output is just [the internal propagation de-
lay value] + [the programmed delay]. The following example
illustrates this in further detail. Here, the Pulse Width Adjust
feature is enabled for each Channel. Channels 0 to 7 are pro-
grammed such that each P output fires 1/2/3/4/5/6/7/0 fine
delays later than the N output and its pulse width is smaller
than the N output by 2/4/6/8/10/12/14/0 fine delays, individu-
ally.
Ch. Register Data Programmed
Fire Delay
Actual Fire
Delay*
P to N Delay & P's Pluse
Width
Ch 0 Reg. 00h 10 001 00000000000000 000 b ND
P: 1FD P fires 1FD later than N.
P’s pulse width is smaller
than N by 2FDs.
N: ND
Ch 1 Reg.01h 10 011 00000000000010 001 b 2CD + 1FD
P: 2CD + 3FD P fires 2FDs later than N.
P’s pulse width is smaller
than N by 4FDs.
N: 2CD + 1FD
Ch 2 Reg. 02h 10 101 00000000000100 010 b 4CD + 2FD
P: 4CD + 5FD P fires 3FDs later than N.
P’s pulse width is smaller
than N by 6FDs.
N: 4CD + 2FD
Ch 3 Reg. 03h 10 111 00000000000110 011 b 6CD + 3FD
P: 6CD + 7FD P fires 4FDs later than N.
P’s pulse width is smaller
than N by 8FDs.
N: 6CD + 3FD
Ch 4 Reg. 04h 10 001 00000000001000 100 b 8CD + 4FD
P: 9CD + 1FD P fires 5FDs later than N.
P’s pulse width is smaller
than N by 10FDs.
N: 8CD + 4FD
Ch 5 Reg. 05h 10 011 00000000001010 101 b 10CD + 5FD
P: 11CD + 3FD P fires 6FDs later than N.
P’s pulse width is smaller
than N by 12FDs.
N: 10CD + 5FD
Ch 6 Reg. 06h 10 101 00000000001100 110 b 12CD + 6FD
P: 13CD + 5FD P fires 7FDs later than N.
P’s pulse width is smaller
than N by 14FDs.
N: 12CD + 6FD
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