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CAP1298 bảng dữ liệu(PDF) 36 Page - Microchip Technology

tên linh kiện CAP1298
Giải thích chi tiết về linh kiện  8-Channel Capacitive Touch Sensor Controller with Proximity Detection & Signal Guard
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CAP1298
DS00001571B-page 36
 2013-2015 Microchip Technology Inc.
5.10
Averaging and Sampling Configuration Register
The Averaging and Sampling Configuration register controls the number of samples taken and the target sensing cycle
time for sensor inputs enabled in the Active state.
Bits 6 - 4 - AVG[2:0] - Determines the number of samples that are taken for all channels enabled in the Active state
during the sensing cycle as shown in Table 5-19. All samples are taken consecutively on the same channel before the
next channel is sampled and the result is averaged over the number of samples measured before updating the mea-
sured results.
For example, if CS1, CS2, and CS3 are sampled during the sensing cycle, and the AVG[2:0] bits are set to take 4 sam-
ples per channel, then the full sensing cycle will be: CS1, CS1, CS1, CS1, CS2, CS2, CS2, CS2, CS3, CS3, CS3, CS3.
TABLE 5-17:
M_PRESS BIT DECODE
M_PRESS[3:0]
M_PRESS Settings
32
1
0
00
0
0
35ms
00
0
1
70ms
0
0
1
0
105ms
0
0
1
1
140ms
0
1
0
0
175ms
0
1
0
1
210ms
0
1
1
0
245ms
0
1
1
1
280ms (default)
1
0
0
0
315ms
1
0
0
1
350ms
1
0
1
0
385ms
1
0
1
1
420ms
1
1
0
0
455ms
1
1
0
1
490ms
1
1
1
0
525ms
1
1
1
1
560ms
TABLE 5-18:
AVERAGING AND SAMPLING CONFIGURATION REGISTER
Addr
R/W
Register
B7
B6
B5
B4
B3
B2
B1
B0
Default
24h
R/W
Averaging and
Sampling
Config
-
AVG[2:0]
SAMP_TIME[1:0]
CYCLE_TIME
[1:0]
39h



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