pca8885 NXP Semiconductors, pca8885 Datasheet - Page 10

• Manufacturer Part Number: pca8885
• Description: Capacitive 8-channel Proximity Switch With Auto-calibration And Very Low Power Consumption
• Manufacturer: NXP Semiconductors

NXP Semiconductors
10. Registers
PCA8885
Objective data sheet
10.1 Register overview
10.2 Register: CONFIG
The PCA8885 has four registers storing the configuration and the status information of the
device.
Table 5.
The bit position labeled as x is not relevant; if read, it can be either logic 0 or logic 1.
Table 6.
Register
name
CONFIG
SENS
CLKREG
MASK
Bit
7 to 6
5
4 to 3
Symbol
OPM[1:0]
SWM
KM[1:0]
Register overview
CONFIG - configuration register bit description
Bit
7
CLO
OPM[1:0]
All information provided in this document is subject to legal disclaimers.
6
CLI
Rev. 1 — 24 November 2011
Capacitive 8-channel proximity switch with auto-calibration
5
SWM
x
Value
00
01
10
11
0
1
00
01
10
11
[1]
[1]
[1]
4
FRQC[1:0]
KM[1:0]
MSK[7:0]
CH[7:0]
3
Description
main operation mode
switching mode
key-press mode
stand-alone device
secondary-chip in a
cascade
primary-chip in a cascade
unused
direct switching mode:
sensor release clears the
corresponding bit in the
SENS register
latching mode:
reading SENS register
clears bits in the SENS
register
N-key mode:
each sensor activity is
reflected in the SENS
register
2-key mode:
only first two keys are
visible in the SENS register
1-key mode:
only first key-press is visible
in the SENS register
unused
2
VROF INTM
FRQF[2:0]
1
0
MSKMODE 0000 0000
PCA8885
© NXP B.V. 2011. All rights reserved.
Reference
Section 10.2.1.1
Section 10.2.1.2
Section 10.2.1.3
Default
value
0000 0000
00x0 1100
1111 1111
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