Datenblatt-pdf.com


CAP1208 Schematic ( PDF Datasheet ) - Microchip

Teilenummer CAP1208
Beschreibung 8-Channel Capacitive Touch Sensor
Hersteller Microchip
Logo Microchip Logo 




Gesamt 30 Seiten
CAP1208 Datasheet, Funktion
CAP1208
8-Channel Capacitive Touch Sensor
General Description
The CAP1208 is a multiple channel capacitive touch
sensor controller. It contains eight (8) individual capac-
itive 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 CAP1208 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 CAP1208 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
• Eight (8) 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 / I2C Compliant Communication Interface
• Available in a 16-pin 3mm x 3mm QFN RoHS
compliant package
• Available in a 14-pin SOIC RoHS compliant pack-
age
2013-2015 Microchip Technology Inc.
DS00001570C-page 1






CAP1208 Datasheet, Funktion
CAP1208
TABLE 1-1: PIN DESCRIPTION FOR CAP1208 (CONTINUED)
QFN Pin
#
SOIC Pin #
10 10
11 11
12 12
13 13
14 14
15 1
16
Bottom
pad
2
-
Pin Name
CS7
CS6
CS5
CS4
CS3
CS2
CS1
Exposed
pad
Pin Function
Capacitive Touch Sensor Input 7
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
Capacitive Touch Sensor Input 1
Not internally connected, but recommend
grounding
Pin Type
AIO
AIO
AIO
AIO
AIO
AIO
AIO
-
Unused
Connection
Connect to
Ground
Connect to
Ground
Connect to
Ground
Connect to
Ground
Connect to
Ground
Connect to
Ground
Connect to
Ground
-
APPLICATION NOTE: All digital pins are 5V tolerant pins.
The pin types are described in Table 1-2, "Pin Types".
TABLE 1-2: PIN TYPES
Pin Type
Power
DI
AIO
DIOD
OD
Description
This pin is used to supply power or ground to the device.
Digital Input - This pin is used as a digital input. This pin is 5V tolerant.
Analog Input / Output - This pin is used as an I/O for analog signals.
Digital Input / Open Drain Output - This pin is used as a digital I/O. When it is used as an
output, it is open drain and requires a pull-up resistor. This pin is 5V tolerant.
Open Drain Digital Output - This pin is used as a digital output. It is open drain and requires
a pull-up resistor. This pin is 5V tolerant.
DS00001570C-page 6
2013-2015 Microchip Technology Inc.

6 Page









CAP1208 pdf, datenblatt
CAP1208
TABLE 3-3: READ BYTE PROTOCOL
Start
1->0
Slave Address WR ACK
Register
Address
0101_000 0
(Note 3-2)
0
XXh
ACK
0
Start
1 ->0
Client Address RD
0101_000 1
(Note 3-2)
ACK
0
Register
Data
XXh
NACK Stop
1 0 -> 1
Note 3-2 CAP1208-1 only. For other addressing options, see Section 3.2.2.
3.3.3 SMBUS SEND BYTE
The Send Byte protocol is used to set the internal address register pointer to the correct address location. No data is
transferred during the Send Byte protocol as shown in Table 3-4.
APPLICATION NOTE: The Send Byte protocol is not functional in Deep Sleep (i.e., DSLEEP bit is set).
TABLE 3-4:
Start
1 -> 0
SEND BYTE PROTOCOL
Slave Address
0101_000
(Note 3-3)
WR
0
ACK
0
Register Address
XXh
ACK
0
Stop
0 -> 1
Note 3-3 CAP1208-1 only. For other addressing options, see Section 3.2.2.
3.3.4 SMBUS RECEIVE BYTE
The Receive Byte protocol is used to read data from a register when the internal register address pointer is known to
be at the right location (e.g. set via Send Byte). This is used for consecutive reads of the same register as shown in
Table 3-5.
APPLICATION NOTE: The Receive Byte protocol is not functional in Deep Sleep (i.e., DSLEEP bit is set).
TABLE 3-5:
Start
1 -> 0
RECEIVE BYTE PROTOCOL
Slave Address
0101_000
(Note 3-4)
RD
1
ACK
0
Register Data
XXh
NACK
1
Stop
0 -> 1
Note 3-4 CAP1208-1 only. For other addressing options, see Section 3.2.2.
3.4 I2C Protocols
The CAP1208 supports I2C Block Read and Block Write.
The protocols listed below use the convention in Table 3-1.
3.4.1 BLOCK READ
The Block Read is used to read multiple data bytes from a group of contiguous registers as shown in Table 3-6.
APPLICATION NOTE: When using the Block Read protocol, the internal address pointer will be automatically
incremented after every data byte is received. It will wrap from FFh to 00h.
DS00001570C-page 12
2013-2015 Microchip Technology Inc.

12 Page





SeitenGesamt 30 Seiten
PDF Download[ CAP1208 Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
CAP12033-Channel Capacitive Touch SensorMicrochip
Microchip
CAP12066-Channel Capacitive Touch SensorMicrochip
Microchip
CAP12088-Channel Capacitive Touch SensorMicrochip
Microchip

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche