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AAT4295/97
Single/Dual RGB Controller
10
4295.2006.03.1.3
The S
2
Cwire interface relies on the number of ris-
ing edges of the EN/SET pin to load the internal
register to a desired count. S
2
Cwire 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).
Table 2: Output Settings.
AAT4297
AAT4297
AAT4295 (only)
Clock OUT6 OUT5 OUT4 OUT3 OUT2 OUT1
1
on
on
on
2
on
on
on
3
on
on
on
4
on
on
on
5
on
on
on
6
on
on
on
7
on
on
on
8
on
on
on
9
on
on
off
10
on
on
off
11
on
on
off
12
on
on
off
13
on
on
off
14
on
on
off
15
on
on
off
16
on
on
off
17
on
off
on
18
on
off
on
19
on
off
on
20
on
off
on
21
on
off
on
22
on
off
on
23
on
off
on
24
on
off
on
25
on
off
off
26
on
off
off
27
on
off
off
28
on
off
off
29
on
off
off
30
on
off
off
31
on
off
off
32
on
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
OUT6 OUT5 OUT4 OUT3 OUT2 OUT1
off
on
on
off
on
on
off
on
on
off
on
on
off
on
on
off
on
on
off
on
on
off
on
on
off
on
off
off
on
off
off
on
off
off
on
off
off
on
off
off
on
off
off
on
off
off
on
off
off
off
on
off
off
on
off
off
on
off
off
on
off
off
on
off
off
on
off
off
on
off
off
on
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
on
on
on
on
off
off
off
off
on
on
on
on
off
off
off
off
on
on
on
on
off
off
off
off
on
on
on
on
off
off
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
on
on
on
off
off
off
off
on
on
on
on
off
off
off
off
on
on
on
on
off
off
off
off
on
on
on
on
off
off
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off