8 Channel Capacitive Touch Sensor with 8 LED Drivers
Datasheet
Chapter 5 Register Description
The registers shown in Table 5.1 are accessible through the communications protocol. An entry of ‘-’
indicates that the bit is not used and will always read ‘0’.
Table 5.1 Register Set in Hexadecimal Order
DEFAULT
REGISTER
ADDRESS
R/W
REGISTER NAME
FUNCTION
VALUE
PAGE
Controls general power states and
power dissipation
00h
03h
R/W
Main Status Control
00h
Page 35
Returns the state of the sampeld
Capacative Touch Sensor
R
Sensor Status
00h
Page 36
04h
0Ah
10h
11h
12h
13h
14h
15h
16h
17h
R
R
R
R
R
R
R
R
R
R
LED Status
Stores status bits for LEDs
Stores the noise flags for sensors
Stores the delta count for CS1
Stores the delta count for CS2
Stores the delta count for CS3
Stores the delta count for CS4
Stores the delta count for CS5
Stores the delta count for CS6
Stores the delta count for CS7
Stores the delta count for CS8
00h
00h
00h
00h
00h
00h
00h
00h
00h
00h
Page 36
Page 37
Page 37
Page 37
Page 37
Page 37
Page 37
Page 37
Page 37
Page 37
Noise Flag Status
Sensor 1 Delta Count
Sensor 2 Delta Count
Sensor 3 Delta Count
Sensor 4 Delta Count
Sensor 5 Delta Count
Sensor 6 Delta Count
Sensor 7 Delta Count
Sensor 8 Delta Count
Controls the sensitivity of the
threshold and delta counts and data
scaling of the base counts
1Fh
R/W
Sensitivity Control
2Fh
Page 38
Controls general functionality and
LED controls
20h
21h
R/W
R/W
Configuration
20h
FFh
Page 39
Page 40
Controls whether the Capacitive
Touch Sensor inputs are sampled
Sensor Enable
Controls reset delay and auto-repeat
delay for sensors operating in the full
power state
22h
R/W
Sensor Configuration
A4h
Page 41
Sensor Configuration
2
Controls the MPRESS controls for all
sensors
23h
24h
26h
27h
R/W
R/W
R/W
R/W
07h
1Dh
FFh
FFh
Page 42
Page 43
Page 44
Page 45
Averaging and
Sampling Config
Controls averaging and sampling
window
Activates manual re-calibration for
Capacative Touch Sensors
Calibration Activate
Interrupt Enable
Enables Interrupts associated with
Capacative Touch Sensors
Revision 1.1 (08-05-09)
SMSC CAP1088
DATA3S2HEET
SMSC [ SMSC CORPORATION ]
