SA8803 Sames, SA8803 Datasheet - Page 6

• Manufacturer Part Number: SA8803
• Description: LIGHT EMITTING DIODE DRIVER
• Manufacturer: Sames

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SA8803
FIGURE 3: TIMING DIAGRAM
The acceptable Clock pulse Period (T
The rising edge may not shift more than half a bit period (B
Therefore:
The acceptable frequency for the clock F
But because:
where B
The SA8803 has been specified for an external clock frequency of 8 times the Baud
Rate ± 3%.
S
S
CLK
DR-00596
11 x B
11 x 8 x T
.·.
.·.
.·.
DATA
CLK
R
= Baud Rate
T
T
P
O
O
- (½ x B
= (B
= (B
O
= 11 x B
T 0
1
P
P
÷ 8) ±
÷ 8) ± 4,55%
P
) <11 x 8 x T
.·. F
F
F
2
P
O
O
(B
± (½ x B
= B
= (B
O
P
22
B
÷ 8)
=
F
R
R
R
O
3
x 8 ± 4.55%
x 8 =
(B
x 8) x
=
O
P
P
)
< 11 x B
÷ 8) (1 ± 1 )
T
O
BIT 11
1
O
) may be calculated as follows:
(B
4
1
B P
(1 ± 22)
O
P
F 0
is calculated as follows:
1
÷ 8)
22
P
=
22
(½ x B
5
8 x S CLK
P
)
6
P
), therefore:
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8