Component - Pins V2.0 Datasheet.pdf

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PSoC Creator™ Component Datasheet
Pins
2.0
Features
 Rapid setup of all pin parameters and drive modes
 Allows PSoC Creator to automatically place and route signals
 Allows interaction with one or more pins simultaneously
General Description
The Pins component allows hardware resources to connect to a physical port-pin. It provides
access to external signals through an appropriately configured physical IO pin. It also allows
electrical characteristics (e.g., Drive Mode) to be chosen for one or more pins; these
characteristics are then used by PSoC Creator to automatically place and route the signals
within the component.
Pins can be used with schematic wire connections, software, or both. To access a Pins
component from component APIs, the component must be contiguous and non-spanning. This
ensures that the pins are guaranteed to be mapped into a single physical port. Pins components
that span ports or are not contiguous can only be accessed from a schematic or with the global
per-pin APIs (see the Application Programming Interface section for details).
Note There are #defines created for each pin in the Pins component to be used with global APIs.
A Pins component can be configured into many combinations of types. For convenience, the
Component Catalog provides four preconfigured Pins components: Analog, Digital Bidirectional,
Digital Input, and Digital Output.
When to Use a Pins Component
Use the Pins component when a design must generate or access an off-device signal through a
physical IO pin. Pins are the most commonly used component in the Catalog. For example, they
are used to interface with potentiometers, buttons, LEDs, peripheral sensors such as proximity
detectors, and accelerometers.
Cypress Semiconductor Corporation • 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600
Document Number: 001-90955 Rev. *C
Revised July 18, 2014
Pins
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PSoC Creator™ Component Datasheet
Input/Output Connections
This section describes the various input and output connections for the Pins component.
Display of Pins
Pins can be configured into complex combinations of digital-input, digital-output, digitalbidirectional, and analog. Simple configurations are generally shown as single pins. More
complex types of pins are shown as standard components with a bounding box (see the
following diagram).
The default, and most common, configurations are shown in the following sections.
Display of Locked Pins
When you assign a Pins component to a physical GPIO or SIO pin using the PSoC Creator
Design-Wide Resources Pin Editor, the tooltip for the Pins component shows the specific pin
assignments. If you lock a pin assignment, the display of the component indicates the
assignment, as shown in the following example:
Note If the Pins component is set to Display as Bus, the display of the component does not
display any locked pin assignments; however, the tooltip still displays this information.
Analog
Configure your Pins component as Analog any time your design requires a connection between
a device pin and an internal analog terminal connected with an analog wire. When configured as
analog, the terminal is shown on the right side of the symbol with the connection drawn in the
color of an analog wire.
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Pins
An analog Pins component may also support digital input or output connections, or both, as well
as bidirectional connections. It is possible to short together digital output and analog signals on
the same pin. This can be useful in some applications, but is not a general use case, and should
be used with care.
Digital Input
Configure a Pins component as digital input any time your design requires a connection between
a device pin and an internal digital input terminal, or if the pin’s state is read by the CPU/DMA. In
all cases using digital-input pins, the pin state is readable by the CPU/DMA. Additionally, if the
schematic terminal (HW Connection) is displayed it can be routed to other components in the
schematic.
When visible, the terminal is shown on the right side of the symbol. The connection is drawn in
the color of a digital wire with a small input buffer to show signal direction.
A digital-input Pins component may also support digital output and analog connections.
Digital Output
Configure a Pins component as digital output any time a device pin is to be driven to a logic high
or low. In all such cases, the pin state is writeable by the CPU/DMA. Additionally, if the terminal
is displayed it can be routed from other components in the schematic. When visible, the terminal
is shown on the left side of the symbol. The connection is drawn in the color of a digital wire with
a small output buffer to show signal direction.
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Pins
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PSoC Creator™ Component Datasheet
A digital-output Pins component may also support digital input and analog connections.
Digital Output Enable
Select digital output enable when digital logic is to be used to quickly control the pin output driver
without CPU intervention. A high logic level on this terminal enables the pin output driver as
configured by the Drive Mode parameter on the General subtab. A logic low level on this
terminal disables the pin output driver and makes the pin assume the HI-Z drive mode. This
terminal is shown when a component is configured with digital output using a schematic
connection, and when the digital output enable has been selected. The digital output enable
appears on the left side of the symbol and connects to the digital output buffer. It is drawn in the
color of a digital wire.
When the pin is set to Display as Bus, only one output enable is provided regardless of the Pins
component width because all of the pins share the same output enable. When not displayed as a
bus, individual output enables are provided per pin.
A digital output enable Pins component may also support input and analog connections.
Digital Bidirectional
Configure a Pins component as digital bidirectional any time your design requires a connection
between a device pin and an internal digital bidirectional terminal. Digital bidirectional mode is
most often used with a communication component like I2C. When configured as digital
bidirectional, the terminal is shown on the left side of the symbol with the connection drawn in the
color of a digital wire with input and output buffers showing that the signal is bidirectional.
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Pins
A bidirectional Pins component may also support analog connections.
Vref
To configure a Pins component to use a Vref signal:

Use a digital input or bidirectional terminal and set the Threshold parameter to Vref on
the Input subtab, or

Use a digital output or bidirectional terminal and configure the Drive Level to Vref on the
Output subtab
Using a Vref requires an SIO pin, indicated with a pink outline. All pins can supply their
respective VDDIO supply voltages. SIO pins can also supply a programmable or analog-routed
voltage for interface with devices at a different potential than the SIO’s Vddio voltage. The Vref
terminal provides the analog routed voltage supplied to the SIO pin. SIO pins can also use the
Vref input as the input threshold for an SIO.
The Vref signal displays on the right side of the component, extending from the bottom of the
SIO single pin or the SIO pin pair, depending on how it is configured. Each SIO pin pair shares a
single Vref input.
Vref can only be used in conjunction with another digital input or output connection.
Note When using Vref, you cannot select Analog.
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Pins
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PSoC Creator™ Component Datasheet
IRQ
To configure a Pins component with an interrupt, you must use a digital input and configure the
Interrupt parameter on the Input subtab. When interrupts are used, the Pins component
displays with a bounding box, and the IRQ is displayed extending from the bottom of the
component. The typical use case is to connect an Interrupt component to this terminal. If the Pin
Interrupt is used to wake the part up from sleep or hibernate low-power mode, the Interrupt
component connected to the Pins irq terminal may not have InterruptType set to
"RISING_EDGE."
An Interrupt can be used in all configurations of the Pins component, as long as you include
digital input.
For more information on configuring the interrupt, see the Interrupt parameter description in the
Input Subtab section.
Any digital input hardware connection can also be connected to an isr component, providing the
ability to generate a pin interrupt on high or low logic level versus on an edge event. Using the
digital input connection for a level interrupt does not use the dedicated pin interrupt logic
configured with this parameter, but instead consumes DSI routing resources.
PSoC 4 Specific Connections
The following terminals are only available on PSoC 4 devices. They can be used when Sync
Mode is set to other modes besides “transparent.”
In Clock
On PSoC 4, the Pins component can use a Clock component or a digital signal as the clock for
the input synchronization logic. If the In Clock parameter on the Clocking tab is specified to be
External, the in_clk terminal is exposed to allow connection on the schematic.
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Pins
In Clock Enable
On PSoC 4, the Pins component can use a digital signal as the clock enable for the input
synchronization logic. If the In Clk En parameter on the Clocking page is specified to be
External, the in_en terminal is exposed to allow connection on the schematic.
In Reset
On PSoC 4, the Pins component can use a digital signal as the reset for the input
synchronization logic. If the In Reset parameter on the Clocking page is specified to be
External, the in_rst terminal is exposed to allow connection on the schematic.
Out Clock
On PSoC 4, the Pins component can use a Clock component or a digital signal as the clock for
the output synchronization logic. If the Out Clock parameter on the Clocking page is specified
to be External, the out_clk terminal is exposed to allow connection on the schematic. Note that
this configuration can be used to drive the clock signal to a pin on PSoC 4 devices. Refer to the
Output Mode parameter for more information on its usage.
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Pins
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PSoC Creator™ Component Datasheet
Out Clock Enable
On PSoC 4, the Pins component can use a digital signal as the clock enable for the input
synchronization logic. If the Out Clk En parameter on the Clocking page is specified to be
External, the out_en terminal is exposed to allow connection on the schematic. If the Output
Mode is set to Clock or Clock-Inverted, then this signal will act as an enable signal to the clock.
Out Reset
On PSoC 4, the Pins component can use a digital signal as the reset for the output
synchronization logic. If the Out Reset parameter on the Clocking page is specified to be
External, the out_rst terminal is exposed to allow connection on the schematic.
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Pins
Component Parameters
Drag a Pins component onto the design schematic and double click it to open the Configure
dialog. This dialog is used to set component-wide parameters, such as the power-on reset state
and physical pin mapping constraints. The parameters are organized into separate tabs called
subtabs.
Pins Tab
The Pins tab has three areas: a toolbar, pin tree, and a set of subtabs. The toolbar is used to
determine how many physical pins are managed by the component and determine their order.
The subtabs are used to set the pin-specific attributes, such as type, direction, drive mode, and
initial state. The pin tree works with the subtabs to allow you to choose the specific pins to which
these attributes are applied.
Toolbar
Contains these commands:

Number of Pins – The number of device pins controlled by the component. Valid values
are between 1 and 64. The default value is 1.
Note Some configurations can only be placed into a single physical port; therefore, the
default maximum number of pins is limited to 8 or less. When the component is configured
as noncontiguous and spanning, the maximum number of pins can be set up to 64
because they no longer need to be placed into a single physical port.

Delete Pin – Deletes selected pins from the tree.
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Pins
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PSoC Creator™ Component Datasheet
Add/Change Alias – Opens a dialog to add or change the alias name for a selected
pin in the tree. You can also double-click a pin or press [F2] to open the dialog.
Move Up/Down – Moves the selected pins up or down in the tree.
Pair/Unpair SIOs – Pairs or unpairs selected SIO pins (identified by a pink outline)
in the tree.
This control specifies whether pins that require SIO should be placed in the same SIO pair
on the device. Pairing pins results in fewer physical SIO pins being “wasted.” This is
because an unpaired pin that requires SIO cannot share its SIO pair on the device with
another pin that requires SIO. For pins to share an SIO pair on the device, they must have
their per-pair settings configured the same way and be adjacent.
A pin requires SIO if Hot Swap is set to true, Threshold is set to anything but LVTTL or
CMOS, Drive Level set to Vref, and/or Drive Current is set to 25mA sink.
Pin Tree
This area displays all of the pins for the component. You can individually select one or more pins
to use with the toolbar commands and subtabs. Each pin displays its name which consists of the
Pins component name + ‘_’ + individual pin alias.
Type Subtab
This is the default subtab displayed for the Pins tab. This is where you choose the type of pins
for your component using the check boxes. The preview area shows what the selected Pins
component symbol will look like with various options selected for that specific pin.

Analog – Select Analog to enable the analog pin terminal to allow analog signal routing
to other components. Selecting analog forces the pin to be physically placed on a GPIO
pin and not an SIO pin.

Digital Input – Select Digital Input to enable the digital input pin terminal (optional) and
enable the Input subtab for additional configuration options related to inputs.
HW Connection – This parameter determines whether the digital input terminal for
an input pin is displayed in the schematic. If displayed, the pin provides a digital
signal to the digital system interconnect (DSI) for use with hardware components.
Independent of this selection, all pins can always be read by the CPU through
registers or APIs. If this option is not selected, the terminal is not displayed and it is
controlled only by software APIs.

Digital Output – Select Digital Output to enable the digital output pin terminal (optional)
and enable the Output subtab for additional configuration options related to outputs.
HW Connection – This parameter determines whether the digital output terminal
for a given output pin is displayed in the schematic. If displayed, the pin outputs the
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Pins
digital signal supplied by hardware components through the DSI. If not displayed,
the output logic level is determined by CPU register or API writes. If this option is
not selected, the terminal is not displayed and it is controlled only by software APIs.
Output Enable – This parameter allows the use of the output enable feature of
pins and displays the output enable input terminal. The output enable feature
allows a hardware signal to control the pin’s output drivers without requiring the
CPU to write registers. A high logic level configures the output drivers, as set in the
Drive Mode parameter. A low logic level disables the output drivers and places the
pin into the HI-Z drive mode.

Bidirectional – Enabling the Bidirectional parameter is functionally equivalent to
enabling the Digital Input with HW Connection and the Digital Output with HW
Connection parameters. The difference is that only a single bidirectional terminal is
displayed on the component symbol rather than separate input and output terminals. Both
Input and Output subtabs are enabled for further configuration.

Show External Terminal – Allows connections to Off-Chip Components to illustrate
circuitry external to PSoC.
General Subtab
The General subtab allows you to set up parameters that apply to each pin, such as the drive
mode, initial state, and minimum supply voltage of the selected pin. The settings on this subtab
include:

Drive Mode – This parameter configures the pin to provide one of the eight available pin
drive modes. The defaults and legal choices are influenced from the selections on the
Type subtab. Refer to the device datasheet for more details on each drive mode. A
diagram shows the circuit representation for each drive mode as it is selected.
If the type is Digital Input or Digital Input/Analog, the default is High Impedance
Digital.
If the pin type is Analog, the default is High Impedance Analog. This is the only
pin drive mode that can support purely Analog pins.
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Pins
PSoC Creator™ Component Datasheet
If the pin type is Bidirectional or Bidirectional/Analog, the default is Open Drain,
Drives Low.
All other pin types default to Strong Drive.
The diagram for each drive mode is as follows:
The Out connection is driven from either the Digital System (when the Digital Output
terminal is connected) or the Data Register (when HW Connection is disabled).
The In connection drives the Pin State register, and the Digital System if the Digital Input
terminal is enabled and connected.
The An connection connects to the Analog System.
Note If any of the three resistive drive modes (Resistive Pull Up, Resistive Pull Down,
Resistive Pull Up/Down) is used, setting the output drive level to Vref does not work.
Note The following modes are not supported for PSoC 4000 series - Resistive Pull Up,
Resistive Pull Down, and Resistive Pull Up/Down.
Note For over voltage tolerance to work properly, the pin must be in one of the following
drive modes: High Impedance Analog, High Impedance Digital, or Open Drain, Drives
Low.
Note The USBIO pins only support the Open Drain, Drives Low and Strong Drive drive
modes. In order to use USBIO pins as inputs, the Open Drain, Drives Low drive mode
should be used.

Initial State – This parameter specifies the pin-specific initial value written to the pin’s
data register after power-on reset (POR). All pins default to a logic low (0) in hardware at
POR. The initial state is written to the pin just after the drive mode is configured, which
occurs as part of the configuration of the entire device.
On PSoC 3 and PSoC 5LP, the initial state is configured high by default only for the
Resistive Pull Up and Resistive Pull Up/Down drive modes to ensure the pull-up resistor is
active.
On PSoC 4, the initial state is configured high by default for Digital Output pins that do not
expose the output enable terminal. In these configurations, the data register is used to control
the output enable.
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Pins
Note This should not be confused with the reset state under the main Reset tab. That
attribute affects the state of the whole port of which the pin is a member, from the moment
of reset, before any other device configuration (including Initial State configuration).

Minimum Supply Voltage – This parameter selects the requested minimum high logic
level output voltage. The requested voltage must be provided by one of the V DDIO supply
inputs. This selection ensures that the Pins component will be mapped onto pins that can
support its required output voltage. If left blank, the component has no voltage
requirements, allowing placement to a pin supplied by any of the available V DDIO voltages.
Valid values are determined by the settings in the System tab of the <project>.cydwr file
for VDDIO0/VDDIO1/VDDIO2/VDDIO3, or VDDD on devices that do not have independent V DDIO
settings. Depending on the selected device, you could have two USB pins that will use
VDDD as their voltage available for placement. The pin cannot be placed if this value is not
less than or equal to the maximum value set for those settings. This range check is
performed outside this dialog; the results appear in the Notice List window if the check
fails.
Input Subtab
The Input subtab specifies input settings. If the pin type is not Digital Input or Bidirectional in
the Type subtab, this subtab is disabled because you do not need to specify input information.

Threshold – This parameter selects the threshold levels that define a logic high level (1)
and a logic low level (0). CMOS is the default and should be used for the vast majority of
application connections. The other threshold levels allow for easy interconnect with
devices with custom interface requirements that differ from that of CMOS. A pin specified
as CMOS or LVTTL will default to CMOS, but may be configured as LVTTL in order to be
placed in a port configured as LVTTL. Thresholds that are derived from Vddio or Vref
require the use of an SIO pin.
CMOS – Default
LVTTL
CMOS or LVTTL
0.4 x Vddio – Requires SIO
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Pins
PSoC Creator™ Component Datasheet
0.5 x Vddio – Requires SIO
0.5 x Vref – Requires SIO
Vref – Requires SIO

Hysteresis – Enables or disables the SIO differential hysteresis for the pin. This feature is
disabled if the Threshold is CMOS, LVTTL, or CMOS or LVTTL. Hysteresis control
requires you to use an SIO pin. GPIO pins always have hysteresis enabled.
Disabled – Default
Enabled

Interrupt – This parameter selects whether the pin can generate an interrupt and, if
selected, the interrupt type. The pin interrupt can be generated with a rising edge, falling
edge, or both edges. If set to anything but None, you must configure the component to be
contiguous so that it is mapped into a single physical port. A single port is required
because all pins in a port logically OR their interrupts together and generate a single
interrupt signal and symbol terminal. The Interrupt parameter uses dedicated pin interrupt
logic, which latches the pins that generated interrupted events. After an interrupt occurs,
the Pin_ClearInterrupt() function must be called to clear the latched pin events to enable
detection of future events. If more than one pin in the Pins component can generate an
interrupt, the Pin_ClearInterrupt() return value can be decoded to determine which pins
generated interrupt events.
None - Default
Rising Edge
Falling Edge
Both Edges

Hot Swap – A pin configured for hot swap capability is mapped to an SIO pin that
supports this capability in hardware. Hot swap capability allows the voltage present on the
pin to rise above the pin’s VDDIO voltage, up to 6.0 V. Hot swap also does not allow a pin
with any voltage up to 6.0 V present to leak current into the PSoC device even when the
PSoC device is not powered. Hot swap is useful for connecting the PSoC device when
unpowered to a communications bus like I2C without shorting the bus or back powering
the PSoC device.
Disabled – Default
Enabled – Requires SIO

Input Buffer Enabled – This parameter enables or disables the pin’s digital input buffer.
The digital buffer is needed to read or use the logic level present on a pin through DSI
routing or a CPU read. The input buffer is needed to use the pin as a digital input. Analog
pins disable the digital input buffer by default to reduce pin leakage in low-power modes. If
the pin type is Analog, the default is Disabled. All other pin types, including combinations
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Pins
that include Analog, default to Enabled. You should disable the input buffers to reduce
current when not needed, especially with analog signals.
Enabled
Disabled

Sync Mode – Input synchronization occurs by default at pins to synchronize all signals
entering the device to the input clock using a double-synchronizer (Double-Sync). On
PSoC 3 and PSoC 5LP, the input clock is always BUS_CLK. On PSoC 4, the input clock
defaults to HFCLK, but may be selected via the In Clock parameter on the Clocking
page. Input synchronization can be optionally disabled at the pin in limited cases in which
an asynchronous signal is required for application performance and does not violate
device operational requirements (Transparent). On PSoC 4, synchronization can also be
performed using a single flip-flop (Single-Sync).
Double-Sync – Default
Single-Sync (PSoC 4 only)
Transparent
Output Subtab
The Output subtab specifies output settings. If the pin type is not Digital Output or
Bidirectional this tab is disabled because you do not need to specify output information.

Slew Rate – The slew rate parameter determines the rise and fall ramp rate for the pin as
it changes output logic levels. Fast mode is required for signals that switch at greater than
1 MHz. You can select slow mode for signals less than 1 MHz switching rate and benefit
from slower transition edge rates, which reduce radiated EMI and coupling with
neighboring signals. On PSoC 4, all pins on the same port must have the same Slew
Rate.
Fast – Default
Slow

Drive Level – This parameter selects the output drive voltage supply sourced by the pin.
All pins can supply their respective VDDIO supply voltages. SIO pins can also supply a
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Pins
PSoC Creator™ Component Datasheet
programmable or analog routed voltage for interface with devices at a different potential
than the SIOs VDDIO voltage.
Vddio – Default
Vref – Requires SIO
Note If any of the three resistive drive modes (Resistive Pull Up, Resistive Pull Down,
Resistive Pull Up/Down) is used, setting the output drive level to Vref does not work.

Current – The drive current selection determines the maximum nominal logic level current
required for a specific pin. Pins can supply more current at the cost of logic level
compliance or can have a maximum value that is less than listed, based on system
voltages. See the device datasheet for more details on drive currents.
4mA source, 8mA sink – Default
4mA source, 25mA sink – Requires SIO

Output Mode – Output synchronization reduces pin-to-pin output signal skew in highspeed signals requiring minimal signal skew. By default, the Output Mode is Transparent
and no synchronization occurs. If Single-Sync is selected, the output signal is
synchronized to the output clock.
Transparent – Default
Single-Sync
Clock (PSoC 4 only)
Clock-Inverted (PSoC 4 only)
On PSoC 3 and PSoC 5LP, the output clock is always BUS_CLK.
On PSoC 4, the output clock defaults to HFCLK, but may be changed via the Out Clock
parameter on the Clocking page.
Choosing either Clock or Clock-Inverted output modes on PSoC 4 allows the externally
connected clock or signal to drive the pin. In this configuration, the data register (DR)
value is used as an enable to the out_clock terminal and must be set high either by
initially setting it to 1 in the pin customizer or set using software. Note that if this is a HW
output pin then the value of the signal connected to the output pin terminal does not affect
the operation of the pin when in this mode. Instead, hardware control of the clock enable
can be achieved if Out Clock Enable signal on the Clocking page is used with DR set
high.

OE Synchronized (PSoC 4 only) – Output Enable synchronization allows the Output
Enable signal to be synchronized to the output clock.
Disabled – Default
Enabled
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Pins
Mapping Tab
The Mapping tab contains parameters that define how the Pins component is displayed in the
schematic view and mapped on to physical pins.
Display as Bus
This parameter selects whether to display individual terminals for each pin or a single wide
terminal (bus). The bus option is only valid when pins are homogeneous. That means all pins in
the component have the same pin type, output/input HW connections, and SIO grouping. They
also must all either use or not use the SIO Vref. Displaying as a bus is useful when many of the
same types of pin are required. This saves schematic space and time to configure and route.
Contiguous
This parameter forces placement in adjacent physical pins within a port. Actual pin placement is
package dependent according to the device datasheet. This option has the following restrictions:

If contiguous, port level APIs are generated for the component. If noncontiguous, port
level APIs are not generated.

If contiguous, the number of pins in the component must be less than or equal to 8.
Spanning
This parameter enables placement in multiple physical ports. This is currently controlled by the
contiguous selection, where contiguous implies nonspanning and noncontiguous implies
spanning. A future release of the software will support separate control of the Spanning
parameter.
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PSoC Creator™ Component Datasheet
Reset Tab
The Reset tab is only available on PSoC 3 and PSoC 5LP.
Power-On Reset
The Power-On Reset (POR) setting on a physical pin is a semi-permanent attribute that you
should not rewrite frequently. The POR setting determines how the pin behaves out of reset. It is
not the same as the drive mode, which is set during the boot process. In almost all cases, the
hardware default of HI-Z is appropriate and you do not need to change this parameter. Note that
the POR setting is a per-port setting, so all pins placed in the same physical port must have the
same value (or be set to Don't Care, in which case they will all end up with the same value).
Warning: The POR setting is programmed into the PSoC’s Non-Volatile Latches (NVLs). These
NVLs have limited write cycles (see Device TRM). Excessive change and re-programming of this
setting can cause the pin to fail. It is recommended that this is left as Don't Care so that the pin
does not get re-programmed when you download the application. If the POR setting must have a
specific value, be sure to lock the pin so that it does not move and cause new pins to be
programmed each time you change your design.

Don't Care – Default. When left set to Don't Care, the POR is determined by the physical
port in which this component is placed. If all of the placed pins in the port are set to Don't
Care, the default POR of the part is used. Otherwise, whatever POR is specified for the
other pins placed in that physical port (they must all match) is used for the ones set to
Don't Care.



High-Z Analog
Pulled-Up
Pulled-Down
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Pins
Clocking Tab
The Clocking tab is only available on PSoC 4.
In Clock
This parameter selects the clock to use for the input synchronization logic of this Pins
component. By default, HFCLK is used as the input synchronization clock. It is also possible to
use a Clock component or other signal by enabling the in_clk terminal (External). To use an offchip signal as the input clock with minimal skew, any pin in this Pins component configured as
Input or Bidirectional may be selected as the In Clock (Pin_N). Any of the options may also be
inverted inside the Pins component.






HFCLK – Default
HFCLK (inverted)
External
External (inverted)
Pin_N
Pin_N (inverted)
In Clk En
This parameter selects a signal to use as the enable signal for the input synchronization logic of
this Pins component. By default, no enable signal is used, and input synchronization is always
enabled. A digital signal from the schematic may be used as the enable by displaying and
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PSoC Creator™ Component Datasheet
connecting the in_en terminal (External). To use an off-chip signal as the enable signal with
minimal delay, any pin in this Pins component configured as Input or Bidirectional may be
selected as the In Clk En (Pin_N). Any of the options may also be inverted inside the Pins
component.





None – Default
External
External (inverted)
Pin_N
Pin_N (inverted)
In Clock Enable Mode
The drop-down to the right of the In Clk En parameter controls the Enable Mode of the In Clock
Enable. If the Enable Mode is set to Rising Edge, the input synchronization flip flops will only
transition on the clock cycle immediately after the enable signal transitions from low to high. If
the Enable Mode is set to Level, the input synchronization flip flops can transition on any clock
cycle when the enable signal is high.


Rising Edge – Default
Level
In Reset
This parameter selects a signal to use as the reset signal for the input synchronization logic of
this Pins component. By default, reset is not used. A digital signal from the schematic may be
used as the enable by displaying and connecting the in_rst terminal (External). To use an offchip signal as the reset signal with minimal delay, any pin in this Pins component configured as
Input or Bidirectional may be selected as the In Reset (Pin_N). Any of the options may also be
inverted inside the Pins component.





None – Default
External
External (inverted)
Pin_N
Pin_N (inverted)
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PSoC® Creator™ Component Datasheet
Pins
Out Clock
This parameter selects the clock to use for the output synchronization logic of this Pins
component. By default, HFCLK is used as the output synchronization clock. It is also possible to
use a Clock component or other signal by enabling the out_clk terminal (External). To use an offchip signal as the output clock with minimal skew, any pin in this Pins component configured as
Input or Bidirectional may be selected as the In Clock (Pin_N). Any of the options may also be
inverted inside the Pins component.






HFCLK – Default
HFCLK (inverted)
External
External (inverted)
Pin_N
Pin_N (inverted)
Out Clk En
This parameter selects a signal to use as the enable signal for the output synchronization logic of
this Pins component. By default, no enable signal is used, and output synchronization is always
enabled. A digital signal from the schematic may be used as the enable by displaying and
connecting the out_en terminal (External). To use an off-chip signal as the enable signal with
minimal delay, any pin in this Pins component configured as Input or Bidirectional may be
selected as the In Clk En (Pin_N). Any of the options may also be inverted inside the Pins
component.





None – Default
External
External (inverted)
Pin_N
Pin_N (inverted)
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PSoC Creator™ Component Datasheet
Out Clock Enable Mode
The drop-down to the right of the Out Clk En parameter controls the Enable Mode of the Out
Clock Enable. If the Enable Mode is set to Rising Edge, the output synchronization flip flop will
only transition on the clock cycle immediately after the enable signal transitions from low to high.
If the Enable Mode is set to Level, the output synchronization flip flop can transition on any clock
cycle when the enable signal is high.


Rising Edge – Default
Level
Output Reset
Allows the selected Out Reset Signal to be used to reset the output synchronization logic.


Disabled – Default
Enabled
OE Reset
Allows the selected Out Reset Signal to be used to reset the output enable synchronization logic.


Disabled – Default
Enabled
Out Reset Signal
This parameter selects a signal to use as the reset signal for either the output synchronization
logic or the output enable synchronization logic of this Pins component. By default, reset is not
used. A digital signal from the schematic may be used as the enable by displaying and
connecting the out_rst terminal (External). To use an off-chip signal as the reset signal with
minimal delay, any pin in this Pins component configured as Input or Bidirectional may be
selected as the Out Reset (Pin_N). Any of the options may also be inverted inside the Pins
component.





None – Default
External
External (inverted)
Pin_N
Pin_N (inverted)
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PSoC® Creator™ Component Datasheet
Pins
Application Programming Interface
Application Programming Interface (API) routines allow you to configure and use the component
using software. The Pins component enables access on a per-pin basis, as well as a
component-wide basis.
Per-Pin APIs
You can access individual pins in the component by using the global APIs defined in the cypins.h
generated file (in the cy_boot directory). These APIs are documented in the System Reference
Guide (Help > Documentation).
PSoC 3 and PSoC 5LP APIs







CyPins_ReadPin()
CyPins_SetPin()
CyPins_ClearPin()
CyPins_SetPinDriveMode()
CyPins_ReadPinDriveMode()
CyPins_FastSlew()
CyPins_SlowSlew()
These APIs can be used with either physical pin register names or the pin alias from the
component. Accessing physical pins directly from software is not recommended because there is
no safeguard against the same pins being allocated to other functions by the tool. Even if a pin is
only accessed from software, Cypress strongly recommends the use of a Pins component. You
can use the generated aliases from the component with the above APIs to safely access
individual pins without a performance or memory penalty.
To use the above APIs, the component generates aliases for the pin registers in the
Pin_aliases.h file, where Pin is the instance name of the Pins component. By default the alias is
the component name with the pin number appended to it:
Pin_x
- x is the pin within the component (0 based)
If you provide an alias name in the Pins configuration dialog, then an additional #define is
created with the form:
Pin_<AliasName>
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PSoC Creator™ Component Datasheet
Either of these aliases can be used. For example Pin has an <AliasName> called “MyAlias”. This
generates aliases, Pin_0 and Pin_MyAlias. To read this pin using the per-pin APIs, you can use
either of these methods:
CyPins_ReadPin(Pin_0)
CyPins_ReadPin(Pin_MyAlias)
PSoC 4 APIs





CY_SYS_PINS_READ_PIN()
CY_SYS_PINS_SET_PIN()
CY_SYS_PINS_CLEAR_PIN()
CY_SYS_PINS_SET_DRIVE_MODE()
CY_SYS_PINS_READ_DRIVE_MODE()
PSoC 4 generates aliases similar to PSoC 3 and PSoC 5LP. However it currently does not use
these in its per-pin APIs due to the differences in the structure of the pin registers. Instead the
registers can be accessed by using the appropriate port register defined in Pin.h, where Pin is
the instance name of the Pins component, and the actual pin position on the port.
For example if you would like to read the value of Pin that is place on P0[0] (assuming Pin is
placed on port 0, pin 0) , you would call:
CY_SYS_PINS_READ_PIN (Pin_PS, 0)
Component APIs
These APIs access all pins in the component in a single function call. Efficient implementation of
component-wide APIs is only possible if all pins are placed in a single physical port on the
device. They are only generated if the component is configured to be contiguous. Noncontiguous
Pins components only allow access on the per-pin basis described above.
By default, PSoC Creator assigns the instance name “Pin_1” to the first instance of a Pins
component in a given design. You can rename it to any unique value that follows the syntactic
rules for identifiers. The instance name becomes the prefix of every global function name,
variable, and constant symbol. For readability, the instance name used in the following table is
“Pin.”
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PSoC® Creator™ Component Datasheet
Pins
The following table lists and describes the interface to each function. The subsequent sections
cover each function in more detail.
Function
Description
Pin_Read()
Reads the physical port and returns the current value for all pins in the component
Pin_Write()
Writes the value to the component pins while protecting other pins in the physical port if
shared by multiple Pins components
Pin_ReadDataReg() Reads the current value of the port’s data output register and returns the current value for all
pins in the component
Pin_SetDriveMode() Sets the drive mode for each of the Pins component’s pins
Pin_ClearInterrupt()
Clears any active interrupts on the port into which the component is mapped. Returns value
of interrupt status register
uint8 Pin_Read(void)
Description:
Reads the associated physical port (pin status register) and masks the required bits
according to the width and bit position of the component instance. The pin’s status
register returns the current logic level present on the physical pin.
Parameters:
None
Return Value:
The current value for the pins in the component as a right justified number.
Side Effects:
None
void Pin_Write(uint8 value)
Description:
Writes the value to the physical port (data output register), masking and shifting the bits
appropriately. The data output register controls the signal applied to the physical pin in
conjunction with the drive mode parameter. This function avoids changing other bits in
the port by using the appropriate method (read-modify-write or bit banding).
Parameters:
uint8 value: Value to write to the component instance.
Return Value:
None
Side Effects:
If you use read-modify-write operations that are not atomic; the Interrupt Service
Routines (ISR) can cause corruption of this API. An ISR that interrupts this API and
performs writes to the Pins component data register can cause corrupted port data. To
avoid this issue, you should either use the Per-Pin APIs (primary method) or disable
interrupts around this API.
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PSoC Creator™ Component Datasheet
uint8 Pin_ReadDataReg(void)
Description:
Reads the associated physical port’s data output register and masks the correct bits
according to the width and bit position of the component instance. The data output
register controls the signal applied to the physical pin in conjunction with the drive mode
parameter. This is not the same as the preferred Pin_Read() API because the
Pin_ReadDataReg() reads the data register instead of the status register. For output pins
this is a useful API to determine the value just written to the pin.
Parameters:
None
Return Value:
The current value of the data register masked and shifted into a right justified number for
the component instance.
Side Effects:
None
void Pin_SetDriveMode(uint8 mode)
Description:
Sets the drive mode for each of the Pins component’s pins.
Parameters:
uint8 mode: Mode for the selected signals. Defined legal options are:
Pin_1_DM_STRONG
Strong Drive
Pin_1_DM_OD_HI
Open Drain, Drives High
Pin_1_DM_OD_LO
Open Drain, Drives Low
Pin_1_DM_RES_UP
Resistive Pull Up
Pin_1_DM_RES_DWN
Resistive Pull Down
Pin_1_DM_RES_UPDWN
Resistive Pull Up/Down
Pin_1_DM_DIG_HIZ
High Impedance Digital
Pin_1_DM_ALG_HIZ
High Impedance Analog
Return Value:
None
Side Effects:
If you use read-modify-write operations that are not atomic, the Interrupt Service
Routines (ISR) can cause corruption of this API. An ISR that interrupts this API and
performs writes to the Pins component Drive Mode registers can cause corrupted port
data. To avoid this issue, you should either use the Per-Pin APIs (primary method) or
disable interrupts around this API.
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PSoC® Creator™ Component Datasheet
Pins
uint8 Pin_ClearInterrupt(void)
Description:
Clears any active interrupts attached with the component and returns the value of the
interrupt status register allowing determination of which pins generated an interrupt
event.
Parameters:
None
Return Value:
uint8: The right-shifted current value of the interrupt status register. Each pin has one bit
set if it generated an interrupt event. For example, bit 0 is for pin 0 and bit 1 is for pin 1
of the Pins component.
Side Effects:
Clears all bits of the physical port’s interrupt status register, not just those associated
with the Pins component.
Functional Description
The pins component allows easy configuration of common pin settings in most designs. It also
provides more advanced configurations for those designs requiring settings beyond the basic
functionality. This section highlights some of the more advanced pin modes that may not be
obvious from the given parameter descriptions.

SIO Pins – The Special Input/Output SIO pins (available in PSoC 3 and PSoC 5LP)
provide differential input buffer and a means to regulate the high-level output voltage
(VOH). The SIO pins are tolerant to input voltages higher than the I/O supply voltage and
can sink up to 25 mA current. There are several ways to choose an SIO pin in your
design. A pin requires SIO if any of the following parameters are set.
Hot Swap is set to true
Threshold Level is set to 0.5 VDDIO, 0.4 VDDIO, 0.5 VREF, VREF
Drive Level is set to Vref,
Drive Current is set to 25mA sink.
An SIO will always be placed on Port 12, where the pin resides. Two SIO pins can be
paired from the component configuration, which allows them to share a common
reference generator block.

POR – Power on Reset (POR) option is available on PSoC 3 and PSoC 5LP. The POR
setting on a physical pin is a semi-permanent attribute that should not be re-written
frequently. The POR setting determines how the pin behaves out of reset. The setting is
port-wide and is not the same as the drive mode, which is set during the boot process. In
almost all cases, the hardware default of Hi-Z is appropriate and this parameter does not
need to be changed.

PSoC 4 Initial State – The initial state for pins on PSoC 4 devices also act as the output
enable for output pins that do not explicitly expose the “Output Enable” terminal. This
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PSoC Creator™ Component Datasheet
allows the software to control the output enable of a pin by writing to the pin’s Data
Register (DR).

PSoC 4 pin clocking – The input and output values can be synchronized with an external
clock using the PSoC 4 pin clocking options. Use this if the pin state needs to be
synchronized with other clocks aside from HFCLK.

Route PSoC 4 clock to pin – Unlike PSoC 3 and PSoC 5LP, clocks in PSoC 4 cannot be
connected directly to a pin terminal unless it is specified to be a clock. To enable this
mode, the Output Mode parameter can be set to either Clock or Clock-Inverted.

PSoC Port Adaptor – Some devices such as PSoC 4000 series do not have Port
Adaptors, which limits some pin functionalities such as input Sync Mode, Output Mode
and PSoC4 pin clocking options. Keep this in mind when migrating devices and consult
the device TRM.
MISRA Compliance
This section describes the MISRA-C:2004 compliance and deviations for the component. There
are two types of deviations defined: project deviations – deviations that are applicable for all
PSoC Creator components and specific deviations – deviations that are applicable only for this
component. This section provides information on component specific deviations. The project
deviations are described in the MISRA Compliance section of the System Reference Guide
along with information on the MISRA compliance verification environment.
The Pins component does not have any specific deviations.
Sample Firmware Source Code
PSoC Creator provides many example projects that include schematics and example code in the
Find Example Project dialog. For component-specific examples, open the dialog from the
Component Catalog or an instance of the component in a schematic. For general examples,
open the dialog from the Start Page or File menu. As needed, use the Filter Options in the
dialog to narrow the list of projects available to select.
Refer to the “Find Example Project” topic in the PSoC Creator Help for more information.
Resources
Each Pins component consumes one physical pin per bit of the Number of Pins parameter.
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PSoC® Creator™ Component Datasheet
Pins
API Memory Usage
The component memory usage varies significantly, depending on the compiler, device, number
of APIs used and component configuration. The following table provides the memory usage for
all APIs available in the given component configuration.
The measurements have been done with the associated compiler configured in Release mode
with optimization set for Size. For a specific design, the map file generated by the compiler can
be analyzed to determine the memory usage.
PSoC 3 (Keil_PK51)
Configuration
PSoC 4 (GCC)
PSoC 5LP (GCC)
Flash
SRAM
Flash
SRAM
Flash
SRAM
Bytes
Bytes
Bytes
Bytes
Bytes
Bytes
50
0
92
0
96
0
Default with interrupt
DC and AC Electrical Characteristics
The following values indicate of expected performance and are based on initial characterization
data.
Pins DC Specifications
Parameter
Description
Conditions
Min
Typ
Max
–
–
5.5
0.5
–
0.52 VDDIO
VDDIO > 3.7
1
–
VDDIO – 1
V
VDDIO < 3.7
1
–
VDDIO – 0.5
V
0.7  VDDIO
–
–
V
SIO_ref + 0.2
–
–
V
VINMAX
Maximum input voltage
VINREF
Input voltage reference
(Differential input mode)
VOUTREF
Output voltage reference (Regulated output mode)
VIH
VIL
VOH
All allowed values of VDDIO
and VDDD
Units
V
V
Input voltage high threshold
GPIO mode
CMOS input
Differential input mode
Hysteresis disabled
Input voltage low threshold
GPIO mode
CMOS input
–
–
0.3 VDDIO
V
Differential input mode
Hysteresis disabled
–
–
SIO_ref – 0.2
V
VDDIO – 0.4
–
–
V
Output voltage high
Unregulated mode
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IOH = 4 mA, VDDIO = 3.3 V
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Pins
PSoC Creator™ Component Datasheet
Parameter
VOL
Description
Conditions
Min
Typ
Max
Units
SIO_ref –
0.65
–
SIO_ref +
0.2
V
SIO_ref – 0.3
–
SIO_ref +
0.2
V
VDDIO = 3.30 V, IOL = 25 mA
–
–
0.8
V
VDDIO = 1.80 V, IOL = 4 mA
–
–
0.4
V
Regulated mode
IOH = 1 mA
Regulated mode
IOH = 0.1 mA
Output voltage low
RPULLUP
Pull-up resistor
3.5
5.6
8.5
k
RPULLDOWN
Pull-down resistor
3.5
5.6
8.5
k
IIL
Input leakage current (Absolute value)
GPIO
25 °C, VDDIO = 3.0 V
–
–
2
nA
SIO: VIH £ VDDSIO
25 °C, VDDSIO = 3.0 V,
VIH = 3.0 V
–
–
14
nA
SIO: VIH > VDDSIO
25 °C, VDDSIO = 0 V,
VIH = 3.0 V
–
–
10
µA
–
–
7
pF
Single-ended mode (GPIO
mode)
–
40
–
mV
Differential mode
–
35
–
mV
–
–
100
µA
[1]
CIN
Input Capacitance
VH
Input voltage hysteresis
[1]
(Schmitt-Trigger)
IDIODE
[1]
Current through
protection diode to VSSIO
Pins AC Specifications
Parameter
Description
Conditions
[1]
TriseF
Rise time in fast strong mode (90/10%)
TfallF
Fall time in fast strong mode (90/10%)
TriseS
Rise time in slow strong mode (90/10%)
TfallS
Fall time in slow strong mode (90/10%)
1.
[1]
[1]
[1]
Min Typ
Max
Units
Cload = 25 pF, VDDIO = 3.3 V
–
–
12
ns
Cload = 25 pF, VDDIO = 3.3 V
–
–
12
ns
Cload = 25 pF, VDDIO = 3.0 V
–
–
75
ns
Cload = 25 pF, VDDIO = 3.0 V
–
–
60
ns
Based on device characterization (Not production tested).
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PSoC® Creator™ Component Datasheet
Parameter
Fsioout
Description
Conditions
Min Typ
Max
Units
SIO output operating frequency
3.3 V < VDDIO < 5.5 V, Unregulated output
(GPIO) mode, fast strong drive mode
Fsioin
Pins
90/10% VDDIO into 25 pF
–
–
33
MHz
1.71 V < VDDIO < 3.3 V, Unregulated output 90/10% VDDIO into 25 pF
(GPIO) mode, fast strong drive mode
–
–
16
MHz
3.3 V < VDDIO < 5.5 V, Unregulated output
(GPIO) mode, slow strong drive mode
–
–
5
MHz
1.71 V < VDDIO < 3.3 V, Unregulated output 90/10% VDDIO into 25 pF
(GPIO) mode, slow strong drive mode
–
–
4
MHz
3.3 V < VDDIO < 5.5 V, Regulated output
mode, fast strong drive mode
Output continuously
switching into 25 pF
–
–
20
MHz
1.71 V < VDDIO < 3.3 V, Regulated output
mode, fast strong drive mode
Output continuously
switching into 25 pF
–
–
10
MHz
1.71 V < VDDIO < 5.5 V, Regulated output
mode, slow strong drive mode
Output continuously
switching into 25 pF
–
–
2.5
MHz
90/10% VDDIO
–
–
66
MHz
90/10% VDDIO into 25 pF
SIO input operating frequency
1.71 V < VDDIO < 5.5 V
Errata
Pins v2.0 Pulled-up and Pulled-down POR settings show a glitch at power up
Question:
When configuring the Power-On Reset (POR) properties of a port in PSoC 3 and PSoC 5LP to
either "Pulled-Up" or "Pulled-Down", there's a glitch appearing at the pin at power-up.
Answer:
The glitch appears in Pins v2.0 for PSoC 3 and PSoC 5LP due to a firmware bug that switched
the POR settings for "Pulled-Up" and "Pulled-Down" modes. The component is not affected if it is
set as "Don't Care" or "High-Z Analog." If you wish to use the "Pulled-Up" or "Pulled-Down" POR
settings, then choose one of the following workaround options:
1. The preferred and recommended workaround is to downgrade to the Pins v1.90
component in the design. This will allow you to configure the POR state to "Pulled-Up" or
"Pulled-Down" without any issues.
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Pins
PSoC Creator™ Component Datasheet
2. If you wish to use Pins v2.0 in PSoC 3 and PSoC 5LP designs, then there are two
options:
a. Leave the POR configuration as "Don't Care", which is a High Impedance state,
and use external pull-up or pull-down resistors.
b. Flip the POR settings for "Pulled-Up" and "Pulled-Down" (i.e., select pull-up if you
want pull-down, or vice-versa). However, if you upgrade to the Pins v2.10
component, then you must undo this change.
Component Changes
This section lists the major changes in the component from the previous version.
Version
Description of Changes
Reason for Changes / Impact
2.0.c
Added Errata section to the datasheet.
To address a glitch with POR settings at power up.
2.0.b
Fixed a defect with SIO pairs on PSoC 3 and
PSoC 5LP. If a Pins component was used to
configure a pair of SIOs, the settings for the
first pin would be silently applied to the
second. As a result, it was not possible to set
up SIO pairs where the parameters were not
identical for both pins.
Version 2.0 of the Pins component allows independent
settings of parameters on the pins. Note, however, that
certain parameters, such as the input threshold, are still
required to match. Normal parameter value checking
within the customizer will catch these errors and force
you to make appropriate corrections.
Updated the handling of SIO pin pairs. When
migrating from an earlier version of the Pins
component, the pin pair can show as being
unpaired.
If the unpairing occurs, delete the pair and add the pins
back.
Datasheet edits.
Updated the screen capture of the Reset tab.
2.0.a
Added a Functional Description section.
2.0
1.90.a
Added support for PSoC 4000 devices.
PSoC 4000 device pins have restrictions on routing and
synchronization features.
Added documentation for PSoC 4 Per-Pin
APIs.
PSoC 4 Per-Pin APIs differ from PSoC 3 and PSoC 5LP
Added clock driving pin information for
PSoC 4 devices.
This requires specific configuration
Clarified Drive Mode diagrams.
Clarification
Minor datasheet edits.
1.90
Added PSoC 4 Support.
PSoC 4 enables new pin clocking options.
1.80
Added MISRA Compliance section.
The component does not have any specific deviations.
Added note about interrupt type for isr
terminal connection.
Clarification
Added note about drive mode support on
USBIOs.
Clarification
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PSoC® Creator™ Component Datasheet
Version
Pins
Description of Changes
Reason for Changes / Impact
Changed Input Synchronized check-box on
Input page to Sync Mode drop-down.
Drop-down allows future modes to be added.
Changed Output Synchronized check-box on
Output page to Output Mode drop-down.
Drop-down allows future modes to be added.
1.70
Minor datasheet edits and updates
1.60.a
Minor datasheet edits and updates
1.60
Added External Terminal capability
Allows pins to connect to Off-Chip Components.
Added note about power-on reset for PSoC 5 Clarification
to datasheet
Added note about API availability for P15[7:6] Clarification
on PSoC 3 ES2 and PSoC 5 to datasheet
1.50.a
The summary has been changed for each of
the four pin macros.
Improved readability.
Added characterization data to datasheet
Improved interrupt information in datasheet
Added note regarding Vref drive level to
datasheet
Minor datasheet edits and updates
1.50
Added Keil function reentrancy support to the Add the capability for customers to specify individual
APIs.
generated functions as reentrant.
Added a sentence to the Reset tab in the
Configure dialog clarifying that Power-On
Reset applies to an entire physical port.
1.20
Clarification.
Display as Bus now gives an error if checked and the Pins component is not homogeneous. The
homogeneous check has been extended to include the HW connections settings.
The only changes needed to go from the older version to the new would come from having 'Display as
Bus' checked and having some HW connections unchecked.
© Cypress Semiconductor Corporation, 2014. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of
any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be used
for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress. Furthermore, Cypress does not authorize its products for
use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress products in lifesupport systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges.
PSoC® is a registered trademark, and PSoC Creator™ and Programmable System-on-Chip™ are trademarks of Cypress Semiconductor Corp. All other trademarks or registered trademarks
referenced herein are property of the respective corporations.
Any Source Code (software and/or firmware) is owned by Cypress Semiconductor Corporation (Cypress) and is protected by and subject to worldwide patent protection (United States and
foreign), United States copyright laws and international treaty provisions. Cypress hereby grants to licensee a personal, non-exclusive, non-transferable license to copy, use, modify, create
derivative works of, and compile the Cypress Source Code and derivative works for the sole purpose of creating custom software and or firmware in support of licensee product to be used only in
conjunction with a Cypress integrated circuit as specified in the applicable agreement. Any reproduction, modification, translation, compilation, or representation of this Source Code except as
specified above is prohibited without the express written permission of Cypress.
Disclaimer: CYPRESS MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Cypress reserves the right to make changes without further notice to the materials described herein.
Cypress does not assume any liability arising out of the application or use of any product or circuit described herein. Cypress does not authorize its products for use as critical components in lifesupport systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress’ product in a life-support systems application
implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges.
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Purchase of I C components from Cypress or one of its sublicensed Associated Companies, conveys a license under the Philips I C Patent Rights to use these components in an I C system,
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provided that the system conforms to the I C Standard Specification as defined by Philips.
Use may be limited by and subject to the applicable Cypress software license agreement.
Document Number: 001-90955 Rev. *C
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