CAP1206
6-Channel Capacitive Touch Sensor
General Description
The CAP1206 is a multiple channel capacitive touch
sensor controller. It contains six (6) individual capaci-
tive touch sensor inputs with programmable sensitivity
for use in touch sensor applications. Each sensor input
is calibrated to compensate for system parasitic capac-
itance and automatically recalibrated to compensate
for gradual environmental changes.
The CAP1206 includes Multiple Pattern Touch recogni-
tion that allows the user to select a specific set of but-
tons to be touched simultaneously. If this pattern is
detected, a status bit is set and an interrupt is gener-
ated.
The CAP1206 has Active and Standby states, each
with its own sensor input configuration controls. Power
consumption in the Standby state is dependent on the
number of sensor inputs enabled as well as averaging,
sampling time, and cycle time. Deep Sleep is the low-
est power state available, drawing 5µA (typical) of cur-
rent. In this state, no sensor inputs are active, and
communications will wake the device.
Applications
•
•
•
•
Desktop and Notebook PCs
LCD Monitors
Consumer Electronics
Appliances
Features
• Six (6) Capacitive Touch Sensor Inputs
- Programmable sensitivity
- Automatic recalibration
- Calibrates for parasitic capacitance
- Individual thresholds for each button
• Multiple Button Pattern Detection
• Power Button Support
• Press and Hold Feature for Volume-like Applica-
tions
• 3.3V or 5V Supply
• Analog Filtering for System Noise Sources
• RF Detection and Avoidance Filters
• Digital EMI Blocker
• 8kV ESD Rating on All Pins (HBM)
• Low Power Operation
- 5µA quiescent current in Deep Sleep
- 50µA quiescent current in Standby (1 sensor
input monitored)
- Samples one or more channels in Standby
• SMBus / I
2
C Compliant Communication Interface
• Available in a 10-pin 3mm x 3mm DFN RoHS
compliant package
2013-2015 Microchip Technology Inc.
DS00001567B-page 1
CAP1206
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The last character of the literature number is the version number, (e.g., DS30000000A is version A of document DS30000000).
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DS00001567B-page 2
2013-2015 Microchip Technology Inc.
CAP1206
Table of Contents
1.0 Introduction ..................................................................................................................................................................................... 4
2.0 Pin Description and Configuration .................................................................................................................................................. 8
3.0 Functional Description .................................................................................................................................................................. 21
4.0 Register Descriptions .................................................................................................................................................................... 58
5.0 Operational Characteristics ........................................................................................................................................................... 69
6.0 Package Outline ............................................................................................................................................................................ 85
Appendix A: Data Sheet Revision History ........................................................................................................................................... 91
The Microchip Web Site ...................................................................................................................................................................... 93
Customer Change Notification Service ............................................................................................................................................... 93
Customer Support ............................................................................................................................................................................... 93
Product Identification System ............................................................................................................................................................. 94
2013-2015 Microchip Technology Inc.
DS00001567B-page 3
CAP1206
1.0
1.1
INTRODUCTION
Block Diagram
FIGURE 1-1:
CAP1206 BLOCK DIAGRAM
VDD
GND
SMCLK
Capacitive Touch Sensing Algorithm
SMBus
Protocol
SMDATA
ALERT#
CS1
CS2
CS3
CS4
CS5
CS6
1.2
Pin Diagrams
FIGURE 1-2:
CAP1206 14-PIN SOIC
N/C
CS1
SMDAT
SMCLK
1
2
CAP1206
4
5
14
13
12
10
9
8
N/C
CS2
CS3
CS5
CS6
GND
ALERT# 3
11 CS4
N/C 6
VDD 7
2013-2015 Microchip Technology Inc.
DS00001567B-page 4
CAP1206
FIGURE 1-3:
CAP1206 PIN DIAGRAM (10-PIN 3 X 3 MM DFN)
CS1
ALERT#
SMDATA
SMCLK
VDD
1
2
3
4
5
GND
10
9
8
7
6
CS2
CS3
CS4
CS5
CS6
TABLE 1-1:
QFN Pin #
PIN DESCRIPTION FOR CAP1206
SOIC Pin #
Pin Name
Pin Function
Capacitive Touch Sensor Input 1
ALERT# - Active low alert / interrupt out-
put for SMBus alert - requires pull-up
resistor (default)
SMDATA - Bi-directional, open-drain
SMBus or I
2
C data - requires pull-up
resistor
SMCLK - SMBus or I
2
C clock input -
requires pull-up resistor
Positive Power supply
Capacitive Touch Sensor Input 6
Capacitive Touch Sensor Input 5
Capacitive Touch Sensor Input 4
Capacitive Touch Sensor Input 3
Capacitive Touch Sensor Input 2
Ground
Pin Type
Unused
Connection
Connect to
Ground
Connect to
Ground
1
2
CS1
AIO
2
3
ALERT#
OD
3
4
SMDATA
DIOD
n/a
4
5
6
7
8
9
10
Bottom
Pad
5
7
9
10
11
12
13
8
SMCLK
VDD
CS6
CS5
CS4
CS3
CS2
GND
DI
Power
AIO
AIO
AIO
AIO
AIO
Power
n/a
n/a
Connect to
Ground
Connect to
Ground
Connect to
Ground
Connect to
Ground
Connect to
Ground
n/a
DS00001567B-page 5
2013-2015 Microchip Technology Inc.
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