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PDF CY8CMBR2044 Data sheet ( Hoja de datos )
| Número de pieza | CY8CMBR2044 | |
| Descripción | Capacitive Button Controllers | |
| Fabricantes | Cypress Semiconductor | |
| Logotipo |  |
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CY8CMBR2044
Capacitive Button Controllers
Capacitive Button Controllers
Features
■ Easiest to use capacitive button controller
❐ Hardware configurable 4-button solution
❐ No software tools or programming required
❐ General purpose outputs (GPO) support direct LED drive
■ Robust noise performance
❐ High sensitivity, low noise capacitive sensing algorithm
❐ Strong immunity to radio frequency (RF) and alternating
current (AC) noise
❐ Low radiated noise emission
■ SmartSense™ auto tuning
❐ No manual tuning required (reduces time to market)
❐ All CapSense® parameters are automatically set in runtime
❐ Ensures signal to noise ratio (SNR) of 5:1 or greater
❐ Supports wide range of input capacitance (5 pF to 40 pF)
■ Advanced features
❐ Toggle feature on GPO
❐ Flanking sensor suppression (FSS) provides robust sensing
even with closely spaced sensors
❐ Delay Off feature (configurable LED run time)
❐ Easier production line testing
• Serial data out for debug
• Failure mode analysis of CapSense buttons
■ Wide operating range
❐ 1.71 V to 5.5 V ideal for unregulated battery applications
■ Low power consumption
❐ Supply current in run mode as low as 15 µA[1] for every button
❐ Deep sleep current: 100 nA
■ Industrial temperature range: –40 °C to + 85 °C
■ 16-pad quad flat no leads (QFN) package (3 mm x 3 mm x
0.6 mm)
Overview
The CY8CMBR2044 incorporates several innovative features to
save time, money, and can quickly enable a capacitive touch
sensing UI in your next design. It does not require any software
tools or coding because system configuration is done using
hardware. These features enable a broader audience of
designers to implement capacitive buttons without learning new
tool sets and developing code. In addition, this device is enabled
with Cypress’s revolutionary SmartSense auto tuning algorithm.
SmartSense ends the need to manually tune the UI during devel-
opment as well as the required retuning during production ramp.
This saves valuable engineering time, test time, production yield
loss, and speeds the time to volume.
The CY8CMBR2044 CapSense controller supports up to four
capacitive sensing buttons and four GPOs. The GPO is an active
low output controlled directly by the CapSense input making it
ideal for a wide variety of consumer, industrial, and medical appli-
cations. The wide operating range of 1.71 V to 5.5 V enables
unregulated battery operation, further saving component cost.
This device supports ultra low power consumption in run mode
as well as deep sleep modes to enhance battery life. In addition
to this, the device also supports many advanced features which
enhance the robustness and user interface of the end solution.
Some of the key advanced features include FSS, which provides
robust sensing even with closely spaced sensors. This is a
critical requirement in small form factor applications. Another key
feature is failure mode analysis that helps ease production line
testing and reduces manufacturing costs.
Note
1. Power consumption calculated with 1.7% touch time, 500 ms scan rate, and CP of each sensor < 19 pF.
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 001-57451 Rev. *C
• San Jose, CA 95134-1709 • 408-943-2600
Revised July 29, 2010
www.DataSheet.in
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CY8CMBR2044
Schematic 2: 3-Buttons, 3-LEDs, 2-Outputs to Master, and Advanced Features Enabled
In the above schematic the device is configured to support:
■ Three CapSense buttons driving three outputs
■ Three LEDs driven by GPO0, GPO1, and GPO2
■ CS3 is disabled (grounded); therefore, GPO3 is left floating
■ FSS enabled, toggle disabled
■ Delay off – 1 second
■ Scan rate – 30 ms
■ Sensor auto reset – 20 seconds
■ Connect a 5.6 Kon resistor R11 to enable serial debug data out feature
Document Number: 001-57451 Rev. *C
www.DataSheet.in
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CY8CMBR2044
Table 8. Serial Data Output
Byte
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
Data
0x0D
0x0A
0x00
FW_Revision
0x00
CS0_CP
CS0_RawCount_LSB
CS0_RawCount_MSB
CS1_RawCount_LSB
CS1_RawCount_MSB
CS2_RawCount_LSB
CS2_RawCount_MSB
CS3_RawCount_LSB
CS3_RawCount_MSB
CS _Status
GPO_Status
0x00
CS1_CP
CS0_ Baseline _LSB
CS0_ Baseline _MSB
CS1_ Baseline _LSB
CS1_ Baseline _MSB
CS2_ Baseline _LSB
CS2_ Baseline _MSB
CS3_ Baseline _LSB
CS3_ Baseline _MSB
0x00
CS2_CP
0x00
CS3_CP
CS0_ DiffCount _LSB
CS0_ DiffCount _MSB
CS1_ DiffCount _LSB
CS1_ DiffCount _MSB
CS2_ DiffCount _LSB
CS2_ DiffCount _MSB
CS3_ DiffCount _LSB
CS3_ DiffCount _MSB
0x00
0xFF
0xFF
Notes
Dummy data for multi chart
–
–
–
CS0 parasitic capacitance in Hex
Unsigned 16-bit integer
–
Unsigned 16-bit integer
–
Unsigned 16-bit integer
–
Unsigned 16-bit integer
–
Gives CapSense button status, least significant bit (LSB) contains CS0 status
Gives GPO status, LSB contains GP0 status
–
CS1 parasitic capacitance in Hex
Unsigned 16-bit integer
–
Unsigned 16-bit integer
–
Unsigned 16-bit integer
–
Unsigned 16-bit integer
–
–
CS2 parasitic capacitance in Hex
–
CS3 parasitic capacitance in Hex
Unsigned 16-bit integer
–
Unsigned 16-bit integer
–
Unsigned 16-bit integer
–
Unsigned 16-bit integer
–
Dummy data for multi chart
Document Number: 001-57451 Rev. *C
www.DataSheet.in
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