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PDF CY8C201AO Data sheet ( Hoja de datos )
| Número de pieza | CY8C201AO | |
| Descripción | Capsense Express-10 Configurable IOs | |
| Fabricantes | Cypress Semiconductor | |
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CY8C201A0
CapSense Express™ - 10 Configurable IOs
with Slider
Features
■ 10 configurable IOs supporting
❐ CapSense™ slider
❐ LED drive
❐ Interrupt outputs
❐ WAKE on interrupt input
❐ User defined input or output
■ 2.4V to 2.9V, 3.10V to 3.6V, and 4.75V to 5.25V operating
voltage
■ Industrial temperature range: –40°C to +85°C
■ I2C slave interface for configuration
❐ Selectable to 50 kHz, 100 kHz, and 400 kHz.
■ Reduce BOM cost
❐ Internal oscillator - no external oscillators or crystal
❐ Free development tool - no external tuning components
■ Low operating current
❐ Active current: 1.5 mA
❐ Deep Sleep current: 2.6 uA
■ Available in 16-pin COL and 16-pin SOIC packages
Overview
The CapSense Express™ controller allows the control of 10 IOs
configurable as one capacitive sensing slider (5 or 10
segments)[1] and the rest as buttons or GPIOs for driving LEDs
or interrupt signals based on various button conditions. The
GPIOs are also configurable for waking up the device from sleep
based on an interrupt input.
The user has the ability to configure slider, buttons, outputs, and
parameters, through specific commands sent to the I2C port. The
IOs have the flexibility of mapping to capacitive buttons and as
standard GPIO functions such as interrupt output or input, LED
drive, and digital mapping of input to output using simple logical
operations. This enables easy PCB trace routing and reduces
the PCB size and stack up. CapSense Express products are
designed for easy integration into complex products.
Architecture
The logic block diagram shows the internal architecture of
CY8C201A0.
The user can configure registers with parameters needed to
adjust the operation and sensitivity of the CapSense system.
CY8C201A0 supports a standard I2C serial communication
interface that allows the host to configure the device and to read
sensor information in real time through easy register access.
The CapSense Express Core
The CapSense Express core has a powerful configuration and
control block. It encompasses SRAM for data storage, an
interrupt controller, and sleep and watchdog timers. System
resources provide additional capability, such as a configurable
I2C slave communication interface and various system resets.
The Analog System contains the CapSense PSoC® block, which
supports capacitive sensing of up to 10 inputs.
Note
1. This part should be selected only if the design requires a slider. This part cannot be configured to work without a slider. For 10 IO requirement use CY8C20110.
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 001-17349 Rev. *F
• San Jose, CA 95134-1709 • 408-943-2600
Revised January 28, 2009
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CY8C201A0
The CapSense Analog System
The CapSense analog system contains the capacitive sensing
hardware which supports the CapSense Successive Approxi-
mation (CSA) algorithm. This hardware performs capacitive
sensing and scanning without external components. Capacitive
sensing is configurable on each pin.
Additional System Resources
System resources provide additional capability useful to
complete systems. Additional resources are low voltage
detection and power on reset. Brief statements describing the
merits of each system resource are:
■ The I2C slave provides 50, 100, or 400 kHz communication
over two wires.
■ Low Voltage Detection (LVD) interrupts can signal the appli-
cation of falling voltage levels and the advanced POR (Power
On Reset) circuit eliminates the need for a system supervisor.
An internal 1.8V reference provides a stable internal reference
so that capacitive sensing functionality is not affected by minor
VDD changes.
Table 3. Examples of I2C Addressing
Slave Address
Defined
B7
B6
B5
B4
0 0000
0 0000
1 0000
1 0000
10 0 0 0 1
10 0 0 0 1
75 1 0 0 1
75 1 0 0 1
127 1 1 1 1
127 1 1 1 1
CapSense Express Software Tool
An easy to use software tool integrated with PSoC Express is
available for configuring and tuning CapSense Express devices.
Refer to the application note “CapSense™ Express Software
Tool - AN42137” for details of the software tool.
I2C Interface
The two modes of operation for the I2C interface are:
■ Device register configuration and status read or write for
controller
■ Command execution
The I2C address is programmable during configuration. It can be
locked to prevent accidental change by setting a flag in a config-
uration register.
I2C Device Addressing
I2C device address is contained in the upper seven bits of the
first byte of a read or write transaction. The first byte of the trans-
action is used by the I2C master to address the slave. The LSB
of the byte contains the R/W bit. If this bit is 0, the master
performs write operation to the addressed slave. If this bit is 1,
the master performs read operation from the addressed slave.
The LSB(B0) is eliminated when fixing the device address. For
example, if the slave address is 02h, then the required address
is 0000010 (7 bit) excluding LSB. If write operation is performed,
the LSB is 0 and the address is 00000100(04h). If read operation
is performed, the LSB is 1 and the address is 00000101(05h).
Table 3 provides examples of I2C addressing.
Address to be
B3 B2 B1 B0 sent (in Hex) by
Master
0 0 0 0(W)
00
0 0 0 1(R)
01
0 0 1 0(W)
02
0 0 1 1(R)
03
0 1 0 0(W)
14
0 1 0 1(R)
15
0 1 1 0(W)
96
0 1 1 1(R)
97
1 1 1 0(W)
FE
1 1 1 1(R)
FF
CapSense Express Register Map
CapSense Express supports user configurable registers through
which the device functionality and parameters are configured.
For details, refer to the CY8C201xx Register Reference Guide.
Document Number: 001-17349 Rev. *F
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CapSense Electrical Characteristics
Max (V)
3.6
Typical (V)
3.3
Min (V)
3.10
3.10 2.7
2.45
3.6 3.3
5.25 5.0
3.10
4.75
Conditions for Supply Voltage
Result
<2.9V
The device automatically reconfigures
itself to work in 2.7V mode of operation.
<2.45V
The scanning for CapSense parameters
shuts down until the voltage returns to
over 2.45V.
<2.4V
The device goes into reset.
>3.10V
The device automatically reconfigures
itself to work in 3.3V mode of operation.
<4.73V
The scanning for CapSense parameters
shuts down until the voltage returns to
over 4.73V.
3.6 to 4.75V
This range is not supported by
CapSense Express. The device will
work, but CapSense scanning is not
enabled until the voltage goes above
4.73V.
2.9 to 3.1V
This range is not supported by
CapSense Express.
AC Electrical Characteristics
5V and 3.3V AC General Purpose IO Specifications
Parameter
Description
TRise0
Rise time, strong mode,
Cload = 50 pF, Port 0
TRise1
Rise time, strong mode,
Cload = 50 pF, Port 1
TFall
Fall time, strong mode,
Cload = 50 pF, all ports
2.7V AC General Purpose IO Specifications
Parameter
Description
TRise0
Rise time, strong mode,
Cload = 50 pF, Port 0
TRise1
Rise time, strong mode,
Cload = 50 pF, Port 1
TFall
Fall time, strong mode,
Cload = 50 pF, all ports
Min
15
10
10
Min
15
10
10
Max
80
50
50
Max
100
70
70
Unit Notes
ns VDD = 3.10V to 3.6V and 4.75V to 5.25V,
10% - 90%
ns VDD = 3.10V to 3.6V, 10% - 90%
ns VDD = 3.10V to 3.6V and 4.75V to 5.25V,
10% - 90%
Unit
ns
Notes
VDD = 2.4V to 2.90V, 10% - 90%
ns VDD = 2.4V to 2.90V, 10% - 90%
ns VDD = 2.4V to 2.90V, 10% - 90%
Document Number: 001-17349 Rev. *F
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