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CAP1293 데이터시트(PDF) 29 Page - Microchip Technology

부품명 CAP1293
상세설명  3-Channel Capacitive Touch Sensor with Proximity
PDF  63 Pages
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제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

CAP1293 데이터시트(HTML) 29 Page - Microchip Technology

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 2013-2015 Microchip Technology Inc.
DS00001566B-page 29
CAP1293
5.6
Configuration Registers
The Configuration registers control general global functionality that affects the entire device.
5.6.1
CONFIGURATION - 20H
Bit 7 - TIMEOUT - Enables the timeout and idle functionality of the SMBus protocol.
• ‘0’ (default) - The SMBus timeout and idle functionality are disabled. The SMBus interface will not time out if the
clock line is held low. Likewise, it will not reset if both the data and clock lines are held high for longer than 200us.
• ‘1’ - The SMBus timeout and idle functionality are enabled. The SMBus interface will reset if the clock line is held
low for longer than 30ms. Likewise, it will reset if both the data and clock lines are held high for longer than 200us.
Bit 5 - DIS_DIG_NOISE - Determines whether the digital noise threshold (see Section 5.20, "Sensor Input Noise Thresh-
old Register") is used by the device. Setting this bit disables the feature.
• ‘0’ - The digital noise threshold is used. If a delta count value exceeds the noise threshold but does not exceed the
touch threshold, the sample is discarded and not used for the automatic recalibration routine.
• ‘1’ (default) - The noise threshold is disabled. Any delta count that is less than the touch threshold is used for the
automatic recalibration routine.
Bit 4 - DIS_ANA_NOISE - Determines whether the analog noise filter is enabled. Setting this bit disables the feature.
TABLE 5-10:
BASE_SHIFT BIT DECODE
BASE_SHIFT[3:0]
Data Scaling Factor
32
1
0
00
0
0
1x
00
0
1
2x
00
1
0
4x
00
1
1
8x
01
0
0
16x
01
0
1
32x
01
1
0
64x
0
1
1
1
128x
1
0
0
0
256x
All others
256x
(default = 1111b)
TABLE 5-11:
CONFIGURATION REGISTERS
Addr
R/W
Register
B7
B6
B5
B4
B3
B2
B1
B0
Default
20h
R/W
Configuration
TIME
OUT
-
DIS_
DIG_
NOISE
DIS_
ANA_
NOISE
MAX_
DUR_EN
-
-
-
20h
44h
R/W
Configuration
2
-
BC_
OUT_
RECAL
BLK_
PWR_
CTRL
BC_
OUT_
INT
SHOW_
RF_
NOISE
DIS_
RF_
NOISE
ACAL
_FAIL
_INT
INT_
REL_
n
40h



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