AAT4295 Datasheet, PDF (10/16 Pages) Advanced Analogic Technologies – Single/Dual RGB Controller

AAT4295/97
Single/Dual RGB Controller
AAT4297
AAT4295 (only)
Clock OUT6 OUT5 OUT4 OUT3 OUT2 OUT1
1
on
on
on
on on
on
2
on
on
on
on on
off
3
on
on
on
on off
on
4
on
on
on
on off
off
5
on
on
on
off on
on
6
on
on
on
off on
off
7
on
on
on
off off
on
8
on
on
on
off off
off
9
on
on
off
on on
on
10
on on
off
on
on
off
11
on on
off
on
off
on
12
on on
off
on
off
off
13
on on
off
off
on
on
14
on on
off
off
on
off
15
on on
off
off
off
on
16
on on
off
off
off
off
17
on off
on
on
on
on
18
on off
on
on
on
off
19
on off
on
on
off
on
20
on off
on
on
off
off
21
on off
on
off
on
on
22
on off
on
off
on
off
23
on off
on
off
off
on
24
on off
on
off
off
off
25
on off
off
on
on
on
26
on off
off
on
on
off
27
on off
off
on
off
on
28
on off
off
on
off
off
29
on off
off
off
on
on
30
on off
off
off
on
off
31
on off
off
off
off
on
32
on off
off
off
off
off
Clock
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
AAT4297
OUT6 OUT5 OUT4 OUT3 OUT2 OUT1
off
on
on
on
on
on
off
on
on
on
on
off
off
on
on
on
off
on
off
on
on
on
off
off
off
on
on
off
on
on
off
on
on
off
on
off
off
on
on
off
off
on
off
on
on
off
off
off
off
on
off
on
on
on
off
on
off
on
on
off
off
on
off
on
off
on
off
on
off
on
off
off
off
on
off
off
on
on
off
on
off
off
on
off
off
on
off
off
off
on
off
on
off
off
off
off
off
off
on
on
on
on
off
off
on
on
on
off
off
off
on
on
off
on
off
off
on
on
off
off
off
off
on
off
on
on
off
off
on
off
on
off
off
off
on
off
off
on
off
off
on
off
off
off
off
off
off
on
on
on
off
off
off
on
on
off
off
off
off
on
off
on
off
off
off
on
off
off
off
off
off
off
on
on
off
off
off
off
on
off
off
off
off
off
off
on
off
off
off
off
off
off
Table 2: Output Settings.
The S²Cwire interface relies on the number of ris-
ing edges of the EN/SET pin to load the internal
register to a desired count. S²Cwire control latches
data after the EN/SET pin has been held high for
the preset latch enable time (T_LAT). The interface
records rising edges of the EN/SET pin and
decodes them into one of 8 states for the AAT4295
or to one of 64 states for the AAT4297, as indicat-
ed in Tables 1 and 2. The counter can be clocked
at speeds up to 1MHz, so different switch combi-
nations may be clocked in lighting applications
without any visible perception to the user.
Alternatively, the EN/SET clock pulses may be
entered one at a time for the desired setting. The
first rising edge of EN/SET enables the IC and
turns all the switches ON. Once the final clock
cycle is received, the EN/SET pin is held high to
maintain the device setting. The device is disabled
500µs (T_OFF) after the EN/SET pin transitions to a
logic low state (see Figure 3).
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4295.2006.03.1.3