5 and 6 Channel Capacitive Touch Sensor
Datasheet
Chapter 4 General Description
The CAP1006 / 1005 are multiple channel Capacitive Touch sensors. The CAP1006 contains six (6)
individual Capacitive Touch sensor inputs while the CAP1005 contains five (5) sensors. Both devices
offer programmable sensitivity for use in touch sensor applications. Each sensor automatically
recalibrates to compensate for gradual environmental changes.
The CAP1005 / CAP1006 offers multiple power states operating at low quiescent currents during its
Deep Sleep state. It can monitor one or more channels while in a lower power state and respond to
communications normally.
The device communicates with a host controller using the SPI bus (CAP1005 only), SMSC BC-Link
bus (CAP1006-2 only), or via SMBus / I2C (CAP1006-1 only). The host controller may poll the device
for updated information at any time or it may configure the device to flag an interrupt whenever a touch
is detected on any sensor.
A typical system diagram for the CAP1006 is shown in Figure 4.1 and a system diagram for the
CAP1005 is shown in Figure 4.2.
VDD
Embedded Controller
CAP1006
Touch
Button
Touch
Button
CS1
CS3
CS5
CS2
CS4
CS6
Touch
Button
Touch
Button
Touch
Button
Touch
Button
1 = CAP1006-1
2 = CAP1006-2
Figure 4.1 System Diagram for CAP1006
SMSC CAP1005 / CAP1006
Revision 1.1 (08-05-09)
DATA2S3HEET
SMSC [ SMSC CORPORATION ]
