SP7680EB Exar Corporation, SP7680EB Datasheet - Page 12

• Manufacturer Part Number: SP7680EB
• Description: Display Modules & Development Tools Complete Backlight Solution
• Manufacturer: Exar Corporation

Specifications of SP7680EB

• Product: Display Modules

In the MAIN, SUB and AUX registers bits B7, B6,
B5, B4, B3 and B2 represent the DAC codes D5-D0
used to set the LED current in the MAIN, SUB and
AUX channels. Bits B1 and B0 are don’t care. The
following table lists the DAC codes and the
corresponding current for each channel in mA; the
table appears below and continues on the right
column.
Addressing and Writing Data to the SP7680
To write data to the SP7680 the following data
cycle must be obeyed:
[Slave
STATUS][Data for CNTRL][Data for MAIN][Data
for SUB][Data for AUX]
Six bytes are communicated each data cycle. All
the settings will take effect right after the
acknowledgement bit of the current data byte.
MAIN, SUB and AUX registers
000000
000001
000010
000011
000100
000101
000110
000111
001000
001001
001010
001011
001100
001101
001110
001111
010000
Sept 13-07 revI
B7…B2
Address
Main
0.031
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
0
with
Sub
0.031
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
0
write
Aux
0.031
10.0
11.0
12.0
13.0
14.0
15.0
16.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
SP7680: Complete Backlight Solution
0
bit][Data
Page 12
for
010001
010010
010011
010100
010101
010110
010111
011000
011001
011010
011011
011100
011101
011110
011111
100000
100001
100010
100011
100100
100101
100110
100111
101000
101001
101010
101011
101100
101101
101110
101111
110000
110001
110010
110011
110100
110101
110110
110111
111000
111001
111010
111011
111100
111101
111110
111111
B7…B2
APPLICATIONS INFORMATION
Main
10.0
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
14.5
15.0
15.5
16.0
16.5
17.0
17.5
18.0
18.5
19.0
19.5
20.0
20.5
21.0
21.5
22.0
22.5
23.0
23.5
24.0
24.5
25.0
25.5
26.0
26.5
27.0
27.5
28.0
28.5
29.0
29.5
30.0
30.5
31.0
31.5
8.5
9.0
9.5
© 2007 Sipex Corporation
Sub
10.0
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
14.5
15.0
15.5
16.0
16.5
17.0
17.5
18.0
18.5
19.0
19.5
20.0
20.5
21.0
21.5
22.0
22.5
23.0
23.5
24.0
24.5
25.0
25.5
26.0
26.5
27.0
27.5
28.0
28.5
29.0
29.5
30.0
30.5
31.0
31.5
8.5
9.0
9.5
Aux
17.0
18.0
19.0
20.0
21.0
22.0
23.0
24.0
25.0
26.0
27.0
28.0
29.0
30.0
31.0
32.0
33.0
34.0
35.0
36.0
37.0
38.0
39.0
40.0
41.0
42.0
43.0
44.0
45.0
46.0
47.0
48.0
49.0
50.0
51.0
52.0
53.0
54.0
55.0
56.0
57.0
58.0
59.0
60.0
61.0
62.0
63.0