sx8662 Semtech Corporation, sx8662 Datasheet - Page 26

• Manufacturer Part Number: sx8662
• Description: Capacitive Button Matrix Up To 36 Controller With Individual Led Drivers And Buzzer Output
• Manufacturer: Semtech Corporation

ADVANCED COMMUNICATIONS & SENSING
The GPO pin fades in and fades out continuously when the associated button is touched. The fading in and out
stops when the button is released. This is shown in Figure 30.
3.15.3 Intensity index vs PWM pulse width
Tables below are used to convert all intensity indexes parameters GpioIntensityOff, GpioIntensityOn and
GppIntensity but also to generate fading in GPO mode
During fading in(out), the index is automatically incremented(decremented) at every Inc(Dec)Time x
Inc(Dec)Factor until it reaches the programmed GpioIntensityOn(Off) value.
Rev5 4
Index
Index
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
0
1
2
3
4
5
6
7
8
9
0
1
Lin/Log
Lin/Log
256/256
255/256
th
10/2
11/2
12/2
13/2
14/2
15/3
16/3
17/3
18/3
19/3
20/3
21/3
22/3
23/3
24/4
25/4
26/4
27/4
28/4
29/4
30/4
31/4
32/5
0/0
2/0
3/0
4/0
5/0
6/2
7/2
8/2
9/2
August 2011
Index
Index
32
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
32
33
ON intensity
Lin/Log
Lin/Log
224/251
223/251
OFF intensity
56/10
57/10
58/10
59/10
60/11
61/11
62/11
63/12
64/12
33/5
34/5
35/5
36/5
37/5
38/6
39/6
40/6
41/6
42/6
43/7
44/7
45/7
46/7
47/7
48/8
49/8
50/8
51/8
52/9
53/9
54/9
55/9
Table 7 Intensity index vs. PWM pulse width (normal polarity)
Index
Index
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
64
65
ON
fading-in
Lin/Log
Lin/Log
192/244
191/243
65/12
66/13
67/13
68/13
69/14
70/14
71/14
72/15
73/15
74/15
75/16
76/16
77/16
78/17
79/17
80/18
81/18
82/19
83/19
84/20
85/20
86/21
87/21
88/22
89/22
90/23
91/23
92/24
93/24
94/25
95/25
96/26
Figure 30
fading-out
© 2011 Semtech Corp.
Index
Index
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
96
97
98
99
96
97
Continuous Fading Mode
Lin/Log
Lin/Log
160/230
159/229
100/28
101/29
102/29
103/30
104/30
105/31
106/32
107/32
108/33
109/33
110/34
111/35
112/35
113/36
114/37
115/38
116/38
117/39
118/40
119/40
120/41
121/42
122/43
123/44
124/44
125/45
126/46
127/47
128/48
97/26
98/27
99/27
26
with Individual LED Drivers and Buzzer Output
Index
Index
Capacitive Button Matrix (up to 36) Controller
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
128
129
Lin/Log
Lin/Log
128/208
127/207
129/48
130/49
131/50
132/51
133/52
134/53
135/54
136/55
137/55
138/56
139/57
140/58
141/59
142/60
143/61
144/62
145/63
146/64
147/65
148/66
149/67
150/68
151/69
152/71
153/72
154/73
155/74
156/75
157/76
158/77
159/78
160/80
OFF
Index
Index
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
160
161
Lin/Log
176/100
177/101
178/103
179/104
180/106
181/107
182/109
183/110
184/111
185/113
186/114
187/116
188/117
189/119
190/121
191/122
192/124
Lin/Log
OFF intensity
161/81
162/82
163/83
164/84
165/86
166/87
167/88
168/89
169/91
170/92
171/93
172/95
173/96
174/97
175/99
96/175
95/174
Index
Index
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
192
193
www.semtech.com
Lin/Log
193/125
194/127
195/129
196/130
197/132
198/133
199/135
200/137
201/139
202/140
203/142
204/144
205/146
206/147
207/149
208/151
209/153
210/155
211/156
212/158
213/160
214/162
215/164
216/166
217/168
218/170
219/172
220/174
221/176
222/178
223/180
224/182
Lin/Log
64/131
63/129
Index
Index
SX8662
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
224
225
Lin/Log
225/184
226/186
227/188
228/190
229/192
230/194
231/197
232/199
233/201
234/203
235/205
236/208
237/210
238/212
239/215
240/217
241/219
242/221
243/224
244/226
245/229
246/231
247/233
248/236
249/238
250/241
251/243
252/246
253/248
254/251
255/253
256/256
Lin/Log
32/72
31/70