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SX1512BIULTRT Datasheet(PDF) 19 Page - Semtech Corporation

Part No. SX1512BIULTRT
Description  World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine
Download  37 Pages
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Maker  SEMTECH [Semtech Corporation]
Homepage  http://www.semtech.com
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SX1512BIULTRT Datasheet(HTML) 19 Page - Semtech Corporation

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ADVANCED COMMUNICATIONS & SENSING
Rev 4 – 26
th April 2011
19
www.semtech.com
SX1511B/SX1512B
World’s Lowest Voltage Level Shifting GPIO
with LED Driver and Keypad Engine
IOLED(X) level
On intensity(max)
Off intensity(min)
RegData(X)
Fade in rate determined by
register RegTRiseX
Minimum intensity duration
determined by register
RegData(x)
Fade out rate determined
by register RegTFallX
Figure 15 – LED Driver Single Shot Mode
4.8.4
Blink Mode
Invoked when TOnX != 0 and TOffX != 0.
If the I/O doesn’t support fading the LED intensity will step directly to the IOnX/IOffX value.
Off intensity(min)
RegData(X)
IOLED(X) level
Fade in rate determined by
register RegTRiseX
Minimum intensity duration
determined by register
RegTOffX
Maximum intensity
duration determined by
register RegTOnX
Fade out rate determined
by register RegTFallX
When RegData(X) is cleared, the LED
will complete any current ramp, and then
stay at minimum intensity
On intensity(max)
Figure 16 – LED Driver Blink Mode
4.8.5
LED Driver Modes
For each IO bank, the LED driver mode of fading capable IOs can be selected between linear or logarithmic in
RegMisc.
Lin.
Log.
Lin.
Log.
Lin.
Log.
Lin.
Log.
Lin.
Log.
Lin.
Log.
Lin.
Log.
Lin.
Log.
0
0
32
4
64
13
96
28
128
53
160
88
192
135
224
198
1
0
33
4
65
13
97
28
129
53
161
88
193
135
225
198
2
0
34
4
66
13
98
30
130
53
162
88
194
135
226
198
3
0
35
4
67
13
99
30
131
53
163
88
195
135
227
198
4
0
36
5
68
14
100
31
132
56
164
93
196
142
228
207
5
0
37
5
69
14
101
31
133
56
165
93
197
142
229
207
6
0
38
5
70
14
102
32
134
56
166
93
198
142
230
207
7
0
39
5
71
14
103
32
135
56
167
93
199
142
231
207
8
1
40
6
72
16
104
34
136
60
168
98
200
150
232
216
9
1
41
6
73
16
105
34
137
60
169
98
201
150
233
216
10
1
42
6
74
17
106
35
138
60
170
98
202
150
234
216
11
1
43
6
75
17
107
35
139
60
171
98
203
150
235
216
12
1
44
7
76
18
108
36
140
65
172
104
204
157
236
225
13
1
45
7
77
18
109
36
141
65
173
104
205
157
237
225


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