Datasheet

8 Channel Capacitive Touch Sensor with 8 LED Drivers
Datasheet
SMSC CAP1188 37 Revision 1.32 (01-05-12)
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
REGISTER
ADDRESS R/W REGISTER NAME FUNCTION
DEFAULT
VALUE PAGE
00h R/W Main Control
Controls general power states and
power dissipation
00h Page 41
02h R General Status Stores general status bits 00h Page 42
03h R Sensor Input Status
Returns the state of the sampled
capacitive touch sensor inputs
00h Page 42
04h R LED Status Stores status bits for LEDs 00h Page 42
0Ah R Noise Flag Status
Stores the noise flags for sensor
inputs
00h Page 44
10h R
Sensor Input 1 Delta
Count
Stores the delta count for CS1 00h Page 44
11h R
Sensor Input 2 Delta
Count
Stores the delta count for CS2 00h Page 44
12h R
Sensor Input 3 Delta
Count
Stores the delta count for CS3 00h Page 44
13h R
Sensor Input 4 Delta
Count
Stores the delta count for CS4 00h Page 44
14h R
Sensor Input 5 Delta
Count
Stores the delta count for CS5 00h Page 44
15h R
Sensor Input 6 Delta
Count
Stores the delta count for CS6 00h Page 44
16h R
Sensor Input 7 Delta
Count
Stores the delta count for CS7 00h Page 44
17h R
Sensor Input 8 Delta
Count
Stores the delta count for CS8 00h Page 44
1Fh R/W Sensitivity Control
Controls the sensitivity of the
threshold and delta counts and data
scaling of the base counts
2Fh Page 45
20h R/W Configuration Controls general functionality 20h Page 47
21h R/W Sensor Input Enable
Controls whether the capacitive
touch sensor inputs are sampled
FFh Page 49
22h R/W
Sensor Input
Configuration
Controls max duration and auto-
repeat delay for sensor inputs
operating in the full power state
A4h Page 49
23h R/W
Sensor Input
Configuration 2
Controls the MPRESS controls for all
sensor inputs
07h Page 51