Component - Pins V2.20 Datasheet.pdf

PSoC® Creator™ Component Datasheet
Pins
2.20
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 Application Programming Interfaces (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 Component Catalog. For
example, they are used to interface with potentiometers, buttons, LEDs, and peripheral sensors
such as proximity detectors and accelerometers.
Cypress Semiconductor Corporation • 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600
Document Number: 001-98278 Rev. *A
Revised May 4, 2016
Pins
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, digital
bidirectional, and analog. Simple configurations are generally shown as single pins. More
complex types of pins are shown as standard components with a bounding box.
Display of Locked Pins
When you assign a Pins component to a physical General Purpose IO (GPIO) or Special IO
(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.
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
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PSoC® Creator™ Component Datasheet
Pins
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
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.
Note The digital output enable terminal is only applicable for hardware signals. It does not apply
when the pin is controlled using firmware.
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.
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Pins
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.
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.
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Pins
PSoC® Creator™ Component Datasheet
Vref can only be used in conjunction with another digital input or output connection.
Note When using Vref, you cannot select "Analog."
IRQ
To configure a Pins component with a port-dedicated interrupt, you must use a digital input and
configure the Interrupt parameter. You must also select the check box that asks whether to use
the dedicated port interrupt. 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. This will allow the pin to use the
dedicated Port Interrupt to trigger its interrupts.
If the check box to use the dedicated port interrupt is not selected, then the IRQ terminal will not
be exposed, and you will not be able to assign an interrupt to use the port specific interrupt.
However, the interrupt registers will be configured to allow you to use the Combined Port
Interrupt through the Global Signal Reference component for those devices that support this
feature.
Note If the Pin Interrupt is used to wake the part up from deep-sleep or hibernate low-power
mode, the Interrupt component connected to the Pins irq terminal may not have InterruptType
set to "RISING_EDGE;" it must be set to "LEVEL" or "Derived."
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.
Alternatively, any digital input hardware connection can also be connected to an Interrupt
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 as a source for the interrupt does not use the
dedicated pin interrupt logic configured with this parameter, but instead consumes digital routing
resources.
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Pins
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 is specified to be "External," the in_clk
terminal is exposed to allow connection on the schematic.
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 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 is specified to be "External," the in_rst terminal
is exposed to allow connection on the schematic.
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Pins
PSoC® Creator™ Component Datasheet
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 is specified to be "External," the
out_clk terminal is exposed to allow connection on the schematic.
Note 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.
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 is specified to be "External," the out_en
terminal is exposed to allow connection on the schematic. If 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 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.
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 pin type, drive mode, and initial
drive state. The pin tree works with the subtabs to allow you to choose the specific pins to which
these attributes are applied.
Toolbar
The 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.
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Pins




Delete Pin – Deletes selected pins from the tree.
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 selected, Threshold is set to anything but "LVTTL" or
"CMOS," Drive Level set to "Vref," and/or 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.
Below the tree is a preview area that shows what the selected Pins component symbol will look
like with various options selected for that specific pin.
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Pins
General Subtab
This is the default subtab displayed for the Pins tab.
It contains the following parameters:
Type
This is where you choose the type of pins for your component using the check boxes.

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 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
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
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PSoC® Creator™ Component Datasheet
Pins
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
the Input subtab and Output subtab are enabled for further configuration.

Show External Terminal – Allows connections to Off-Chip components in the
Component Catalog to illustrate circuitry external to PSoC.
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 Type selections. 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 Type is Analog, the default is High Impedance Analog. This is the only pin drive
mode that can support purely Analog pins.
If the 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:
High
Impediance
Analog

High
Impediance
Digital
Resistive Pull
Up
Resistive Pull
Down
Open Drain,
Drives Low
Open Drain,
Drives High
Strong Drive
Resistive Pull
Up & Down
The "DR" connection is driven from either the Digital System (when the Digital Output
terminal is connected) or the Data Register (when HW Connection is disabled).
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

Pins
The "PS" connection drives the Pin State register. It also drives the Digital System if the
Digital Input terminal is enabled and connected.
The analog connection connects directly to the pin.
Notes


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.
Direct connection of pins to fixed function hardware blocks on PSoC 4 devices have drive
mode limitations. Refer to the device TRM for more information on the restrictions.
For example, PSoC 4000 devices permit only direct connections to the peripherals. The
drive mode is limited for the following peripheral connections.
Peripheral
TCPWM



I/O
Drive Mode Limitation
Input
Limited to HiZ Digital. No other drive modes are allowed
Output
No restrictions
For over voltage tolerance to work properly, the pin must be in one of the following Drive
Modes:
□
High Impedance Analog
□
High Impedance Digital
□
Open Drain, Drives Low
PSoC 3 and PSoC 5LP 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" option should be used.
PSoC 4 USB pins can only be software controlled digital pins. It supports all drive modes
except for “Resistive Pull Down”, “Open Drain, Drives High” and “Resistive Pull Up/Down”.
Initial Drive State
This parameter specifies the pin-specific initial value written to the pin's Data Register after a
device reset/power-on. This happens during port configuration process in device start-up code.
Unless changed manually or automatically configured to logic high (1) by the pin Drive Mode
parameter, all pins default to logic low (0).The initial drive state is configured high (1) 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 drive state is not configurable for hardware digital output pins. This is
driven by the signal attached to it and hence the initial drive state does not get set at the output.
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PSoC® Creator™ Component Datasheet
Pins
Note PSoC 4 device pins default to Hi-Z Analog at device startup. The initial drive state will not
take effect until the port configuration in the start-up code.
Note For PSoC 3 and PSoC 5LP devices, this should not be confused with the Power-On Reset
setting 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 drive 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 VDDIO 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 VDDIO voltages.
Valid values are determined by the settings in the Design-Wide Resources System Editor (in the
<project>.cydwr file) for VDDIO0/VDDIO1/VDDIO2/VDDIO3, or VDDD on devices that do not have
independent VDDIO 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.
Hot Swap
A pin configured for hot swap capability is mapped to an SIO or a GPIO Over-Voltage Tolerance
(GPIO_OVT) 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 or GPIO_OVT
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Pins
Input Subtab
The Input subtab specifies input settings. If the Type is not "Digital Input" or "Bidirectional," 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) for the entire port on which that pin is placed. "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 those 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, a
routed Vref, or an Internal Vref (1.2 V) require the use of an SIO pin. This setting is on a port, so
if it is in the same group where there are different settings, the port cannot be contiguous.
Allowed Multiplier values
PSoC 3 /
PSoC 5LP
PSoC 4
without SIO
PSoC 4
with SIO
CMOS
1
1
1
Default: Applicable for all devices
LVTTL
1
1
1
Applicable for all devices
CMOS or LVTTL
1
1
1
Applicable for all devices
N/A
1
1
PSoC 4 only (excluding PSoC 4000 / PSoC 4100 /
PSoC 4200)
0.4, 0.5
N/A
0.4, 0.5
Requires SIO
Vref
1
N/A
1
Requires SIO
0.5 x Vref
1
N/A
All
Requires SIO
Vref (Internal)
N/A
N/A
1
Requires SIO (PSoC 4 only)
0.5 x Vref (Internal)
N/A
N/A
All
Requires SIO (PSoC 4 only)
Threshold
CMOS 1.8V
Vddio
Notes
The list of possible multiplier values include:


1.00 x - Default
1.25 x
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PSoC® Creator™ Component Datasheet
Pins






1.49 x
1.67 x
2.08 x
2.50 x
2.78 x
4.16 x
Note For PSoC 4 SIO, Vref and Internal Vref share resources with the Drive Level parameter in
the Output subtab. Therefore, they need to match if using these options in a pin configured as
both Digital input pin and a Digital output.
Note When using 0.5 x Vref or 0.5 x Vref (Internal) options, the voltage on Vref or the 1.2 V
Vref (Internal) must adhere to the lower limit of 1 V and the upper limit of (VDD – 0.4 V). That is,
1 V < (Vref x multiplier) < (VDD - 0.4 V)
Operating beyond this limit will result in incorrect operation. The Vref component in the relation
above is the full Vref, NOT 0.5 x Vref.
Hysteresis
This parameter is used to configure the pin hysteresis. The hysteresis is always enabled for all
pins except for SIOs in PSoC 3 and PSoC 5LP. In this case, the parameter allows the differential
hysteresis to be enabled or disabled.


Disabled – Default for PSoC 3 or PSoC 5LP SIOs
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 via dedicated Port
Interrupt.
This parameter uses dedicated pin interrupt logic, which latches the pins that generated the
interrupt 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.
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Pins
Note Some ports on PSoC 4 devices do not have dedicated port interrupts that can wake up the
device from deep-sleep. If this is a feature you wish to use on that particular port, then the
Combined Port Interrupt (AllPortInt) signal provided by the Global Signal Reference component
can be used. To use this feature, the Dedicated Interrupt checkbox should be unchecked.
Refer to the parameter description and the Functional Description section for more information.
The following interrupt options are supported:




None – Default
Rising Edge
Falling Edge
Both Edges
Dedicated Interrupt
Ports on certain devices do not have dedicated Port Interrupts capable of waking up the chip
from deep-sleep. They can all however provide port-wide wakeup from chip sleep mode. Check
the Dedicated Interrupt check box to be able to use the port dedicated interrupt logic, if you do
not intend to use it for wakeup from deep-sleep mode.
If however you do wish to use the pin as a wakeup source from chip deep-sleep, then refer to the
TRM to see if that particular port has the capability of waking up the device from chip deepsleep.
For certain devices such as PSoC 4200M and PSoC 4200L, you may use the Global Signal
Reference component, which provides a Combined Port Interrupt (AllPortInt) signal that gets
triggered whenever an interrupt condition is met on any of the interrupt-enabled pins on the
device. This resource allows you to wake-up the device from chip deep-sleep. Uncheck the
Dedicated Interrupt checkbox to use this feature.
Note The Combined Port interrupt triggers also for pins on all enabled ports with dedicated port
interrupts. Refer to the Functional Description section for usage information.
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 Type is "Analog," the default is "Disabled." All
other pin types, including combinations that include "Analog," default to "Enabled." You should
disable the input buffers to reduce current when not needed, especially with analog signals.


Enabled
Disabled
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PSoC® Creator™ Component Datasheet
Pins
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.
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 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.
On GPIO pins, 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 SIO pins, fast mode is required for signals that switch at greater than 10 MHz You can select
slow mode for signals less than 10 MHz switching rate and benefit from lower power usage by
the SIO output buffer.
For devices supporting GPIO_OVT, I2C FM+, and I2C HS, options can be used for improving the
slew rate to meet FM+ and I2C HS specification. This option also requires the Minimum Supply
Voltage to be defined.
Note On PSoC 4 devices, all pins on the same port must have the same Slew Rate.

Fast – Default
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



Pins
Slow
I2C FM+ – Requires GPIO_OVT
I2C HS <= 1.7 Mbps – Requires GPIO_OVT
I2C HS > 1.7 Mbps – Requires GPIO_OVT
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 programmable or analog
routed voltage for interface with devices at a different potential than the SIOs VDDIO voltage. SIOs
in PSoC 4 can use a routed external Vref or an internal Vref (1.2 V) as the drive voltage supply.
Allowed Multiplier values
PSoC 3 /
PSoC 5LP
PSoC 4
without SIO
PSoC 4
with SIO
Vddio
1
1
1
Default – Applicable for all devices
Vref
1
N/A
All
Requires SIO
N/A
N/A
All
Requires PSoC 4 SIO
Threshold
Vref (Internal)
Notes
The list of multiplier values include:








1.00 x - Default
1.25 x
1.49 x
1.67 x
2.08 x
2.50 x
2.78 x
4.16 x
Note For PSoC 4 SIO, external Vref and Internal Vref share resources with the Threshold
parameter. Therefore they need to match if using these options in a pin configured as both
Digital input pin and a Digital output pin.
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Pins
Note: When using Vref or Vref (Internal) options, the voltage on Vref or the 1.2V Vref (Internal)
must adhere to the lower limit of 1V and the upper limit of (VDD – 0.4V). i.e.
1V < (Vref x multiplier) < (VDD - 0.4V)
Operating beyond this limit will result in incorrect operation.
Note In PSoC 3 and PSoC 5LP devices, 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. For PSoC 4 devices, the drive mode must be Strong Drive if you are using either
Vref or Vref (Internal).
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, 10mA sink – Requires GPIO_OVT or SIO (PSoC 4 only)
4mA source, 25mA sink – Requires SIO
Output Mode
Output synchronization reduces pin-to-pin output signal skew in high-speed signals requiring
minimal signal skew. By default, this parameter is set to "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.
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 is
used with DR set high.
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Pins
OE Synchronized (PSoC 4 only)
Output Enable synchronization allows the Output Enable signal to be synchronized to the output
clock.


Disabled – Default
Enabled
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, portlevel APIs are not generated.
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Pins

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.
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 (Hi-Z Analog) is used. Otherwise, whatever
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Pins
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
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 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 off-chip signal as
the input clock with minimal skew, any pin in this 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)
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Pins




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 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
connecting the in_en terminal (External). To use an off-chip signal as the enable signal with
minimal delay, any pin in this 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
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Pins
In Reset
This parameter selects a signal to use as the reset signal for the input synchronization logic of
this 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 off-chip signal
as the reset signal with minimal delay, any pin in this 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)
Out Clock
This parameter selects the clock to use for the output synchronization logic of this 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 off-chip signal
as the output clock with minimal skew, any pin in this 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)
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Pins
Out Clk En
This parameter selects a signal to use as the enable signal for the output synchronization logic of
this 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)
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
This allows the selected Out Reset Signal to be used to reset the output synchronization logic.


Disabled – Default
Enabled
OE Reset
This allows the selected Out Reset Signal to be used to reset the output enable synchronization
logic.


Disabled – Default
Enabled
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Pins
Out Reset Signal
This selects a signal to use as the reset signal for either the output synchronization logic or the
output enable synchronization logic of this 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 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)
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 on
component-wide basis. The preferred method of using Pins component is to use the componentwide API for pins that are contiguous. If they are non-contiguous, then the Per-Pin API should be
used.
The API functions access all pins in the component in a single function call. Efficient
implementation of component-wide function is only possible if all pins are placed in a single
physical port on the device. They are generated only if the component is configured to be
contiguous. Non-contiguous Pins components only allow access on the per-pin basis described
under Per-Pin API.
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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Pins
General API
General API functions are used for run-time configuration of the component during active power mode.
These include, initializing, starting, stopping, reading from registers and writing to registers.
Functions

uint8 Pin_Read(void)
Reads the associated physical port (pin status register) and masks the required bits according to the width and
bit position of the component instance.

void Pin_Write(uint8 value)
Writes the value to the physical port (data output register), masking and shifting the bits appropriately.

uint8 Pin_ReadDataReg(void)
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.

void Pin_SetDriveMode(uint8 mode)
Sets the drive mode for each of the Pins component's pins.

void Pin_SetInterruptMode(uint16 position, uint16 mode)
Configures the interrupt mode for each of the Pins component's pins. Alternatively you may set the interrupt mode
for all the pins specified in the Pins component.

uint8 Pin_ClearInterrupt(void)
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.
Function Documentation
uint8 Pin_Read (void )
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.
Returns:
The current value for the pins in the component as a right justified number.
Function Usage
{
uint8 pinState;
/* Read the state of a digital pin */
pinState = Pin_Read();
}
void Pin_Write (uint8 value)
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).
Note This function should not be used on a hardware digital output pin as it is driven by the hardware signal
attached to it.
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Parameters:
value
Pins
Value to write to the component instance.
Returns:
None
Side Effects
If you use read-modify-write operations that are not atomic; the Interrupt Service Routines (ISR) can cause
corruption of this function. An ISR that interrupts this function 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 function.
Function Usage
{
#define LED_ON
#define LED_OFF
1u
0u
/* Turn on an LED connected to a SW controlled pin */
Pin_Write(LED_ON);
}
uint8 Pin_ReadDataReg (void )
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 function to determine the value just written
to the pin.
Returns:
The current value of the data register masked and shifted into a right justified number for the component
instance.
Function Usage
{
uint8 dataRegVal;
/* Write a logic 1 to pin 0 and pin 2 of "Pin" instance */
Pin_Write(0x05);
/* Read the data register of the Pin component */
dataRegVal = Pin_ReadDataReg();
}
void Pin_SetDriveMode (uint8 mode)
Sets the drive mode for each of the Pins component's pins.
Note This affects all pins in the Pins component instance. Use the Per-Pin APIs if you wish to control individual
pin's drive modes.
Note USBIOs have limited drive functionality. Refer to the Drive Mode parameter for more information.
Parameters:
mode
Mode for the selected signals. Valid options are documented in Drive
mode constants.
Returns:
None
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PSoC® Creator™ Component Datasheet
Pins
Side Effects
If you use read-modify-write operations that are not atomic, the ISR can cause corruption of this function. An
ISR that interrupts this function 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 function.
Function Usage
{
/* Set the Pin to analog high-Z to prepare for deep-sleep */
Pin_SetDriveMode (Pin_DM_ALG_HIZ);
/* Call Sleep() function of a component connected to the Pin */
/* Put the chip into deep-sleep mode */
CySysPmDeepSleep();
}
void Pin_SetInterruptMode (uint16 position, uint16 mode)
Configures the interrupt mode for each of the Pins component's pins. Alternatively you may set the interrupt mode
for all the pins specified in the Pins component.
Note The interrupt is port-wide and therefore any enabled pin interrupt may trigger it.
Parameters:
position
mode
The pin position as listed in the Pins component. You may OR these to
be able to configure the interrupt mode of multiple pins within a Pins
component. Or you may use Pin_INTR_ALL to configure the interrupt
mode of all the pins in the Pins component.

Pin_0_INTR (First pin in the list)

Pin_1_INTR (Second pin in the list)

...

Pin_INTR_ALL (All pins in Pins component)
Interrupt mode for the selected pins. Valid options are documented in
Interrupt constants.
Returns:
None
Side Effects
It is recommended that the interrupt be disabled before calling this function to avoid unintended interrupt
requests. Note that the interrupt type is port wide, and therefore will trigger for any enabled pin on the port.
Function Usage
{
/* Turn off the interrupt capability of pin 0 and pin 1 of Pin instance */
Pin_SetInterruptMode(Pin_0_INTR | Pin_1_INTR, Pin_INTR_NONE);
}
uint8 Pin_ClearInterrupt (void )
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.
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Pins
Returns:
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.
Function Usage
{
/* This code is placed inside the ISR of the port interrupt connected to the Pin.
It may also be placed inside the ISR of the AllPortInt signal from the GSRef
component for those devices that support this functionality. */
uint8 intrSrc;
/* Clear the port interrupt and determine which pin triggered it */
intrSrc = Pin_ClearInterrupt();
}
Power Management API
Power management API functions perform the necessary configurations to the components to prepare it for entering
low power modes.
These functions must be used if the intent is to put the chip to sleep, then to continue the component operation when
it comes back to active power mode.
Functions

void Pin_Sleep(void)
Stores the pin configuration and prepares the pin for entering chip deep-sleep/hibernate modes. This function
must be called for SIO and USBIO pins. It is not essential if using GPIO or GPIO_OVT pins.

void Pin_Wakeup(void)
Restores the pin configuration that was saved during Pin_Sleep().
Function Documentation
void Pin_Sleep (void )
Stores the pin configuration and prepares the pin for entering chip deep-sleep/hibernate modes. This function
must be called for SIO and USBIO pins. It is not essential if using GPIO or GPIO_OVT pins.
Note This function is available in PSoC 4 only.
Returns:
None
Side Effects
For SIO pins, this function configures the pin input threshold to CMOS and drive level to Vddio. This is
needed for SIO pins when in device deep-sleep/hibernate modes.
Function Usage
{
/* Place the SIO Pin in correct state before entering deep sleep */
Pin_Sleep();
/* Put the chip into deep-sleep mode */
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Pins
CySysPmDeepSleep();
/* The chip woke up from deep-sleep. Restore the SIO settings */
Pin_Wakeup();
}
void Pin_Wakeup (void )
Restores the pin configuration that was saved during Pin_Sleep().
For USBIO pins, the wakeup is only triggered for falling edge interrupts.
Note This function is available in PSoC 4 only.
Returns:
None
Function Usage
Refer to Pin_Sleep() for an example usage.
API Constants
Component API functions are designed to work with pre-defined enumeration values.
These values should be used with the functions that reference them.
Modules

Drive mode constants
Constants to be passed as "mode" parameter in the Pin_SetDriveMode() function.

Interrupt constants
Constants to be passed as "mode" parameter in Pin_SetInterruptMode() function.
Data Structures
Data Structures are used to group related elements.
The following data structures are used by the component API functions.
Data Structures

struct Pin_BACKUP_STRUCT
Deprecated Code
Deprecated code that is no longer used by the component.
This component contains deprecated code that is not recommended for use but is kept to preserve backward
compatibility with the existing designs. Deprecated code should no longer be used in new projects.
Macros

#define Pin_DRIVE_MODE_SHIFT (0x00u)

#define Pin_DRIVE_MODE_MASK (0x07u << Pin_DRIVE_MODE_SHIFT)
Drive mode constants
Constants to be passed as "mode" parameter in the Pin_SetDriveMode() function.
Macros

#define Pin_DM_ALG_HIZ (0x00u)
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Pins
High Impedance Analog.

#define Pin_DM_DIG_HIZ (0x01u)
High Impedance Digital.

#define Pin_DM_RES_UP (0x02u)
Resistive Pull Up.

#define Pin_DM_RES_DWN (0x03u)
Resistive Pull Down.

#define Pin_DM_OD_LO (0x04u)
Open Drain, Drives Low.

#define Pin_DM_OD_HI (0x05u)
Open Drain, Drives High.

#define Pin_DM_STRONG (0x06u)
Strong Drive.

#define Pin_DM_RES_UPDWN (0x07u)
Resistive Pull Up/Down.
Interrupt constants
Constants to be passed as "mode" parameter in Pin_SetInterruptMode() function.
Macros

#define Pin_INTR_NONE ((uint16)(0x0000u))
Disabled.

#define Pin_INTR_RISING ((uint16)(0x5555u))
Rising edge trigger.

#define Pin_INTR_FALLING ((uint16)(0xaaaau))
Falling edge trigger.

#define Pin_INTR_BOTH ((uint16)(0xffffu))
Both edge trigger.
Data Structure Documentation
Pin_BACKUP_STRUCT Struct Reference
Data Fields

uint32 pcState

uint32 sioState

uint32 usbState
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Pins
PSoC® Creator™ Component Datasheet
Field Documentation
uint32 Pin_BACKUP_STRUCT::pcState
State of the port control register
uint32 Pin_BACKUP_STRUCT::sioState
State of the SIO configuration
uint32 Pin_BACKUP_STRUCT::usbState
State of the USBIO regulator
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Pins
Per-Pin API
You can access individual pins in the component separately by using the global API functions
defined in the cypins.h generated file (in the cy_boot directory). These API functions are
documented in the System Reference Guide (Help in PSoC Creator toolbar).
To use the per-pin API functions, the Pins 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>
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 API function,
you can use either of these methods:
CyPins_ReadPin(Pin_0)
CyPins_ReadPin(Pin_MyAlias)
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.
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
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.
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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
Default with interrupt
Default with interrupt and
LPM API functions
PSoC 4 (GCC)
PSoC 5LP (GCC)
Flash
SRAM
Flash
SRAM
Flash
SRAM
Bytes
Bytes
Bytes
Bytes
Bytes
Bytes
60
0
112
0
112
0
-
-
152
12
-
-
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 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 Vddio, 0.5 x External/Internal Vref, External/Internal Vref
□
Drive Level is set to External/Internal Vref,
□
Drive Current is set to 25mA sink.
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.
Page 36 of 46
Document Number: 001-98278 Rev. *A
PSoC® Creator™ Component Datasheet

Pins
OVT Pins – Some GPIOs have an Over-Voltage Tolerance (OVT) feature that allows
them to withstand higher voltages than the specified levels. A GPIO_OVT pin is used if
any of the following parameters is set.
□
Hot Swap is set to true
□
Slew Rate is set to I2C FM+, or I2C HS
□
Drive Current is set to 10mA sink
Note: GPIO_OVT pins are functionally identical to regular GPIOs. However, they contain
these extra features and allow tolerance of voltages higher than the I/O supply voltage.

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 Adapter – Some devices, such as PSoC 4000 series and specific ports on
PSoC 4 devices, do not have Port Adapters. This limits some pin features such as input
Sync Mode, Output Mode and PSoC 4 pin clocking options. Keep this in mind when
migrating devices or ports and consult the device TRM.

Port Interrupts – Port interrupts allow signal transitions on the port pins to trigger an
interrupt. To use these, you must connect a LEVEL or Derived interrupt type to the IRQ
terminal of the Pins component. This interrupt can be triggered in all power modes. If you
choose to connect a RISING_EDGE interrupt to either the IRQ terminal or the Pin I/O
terminal, then routing resources will be used and the interrupt will be limited to active and
sleep power modes.

PSoC 4 dedicated port interrupts – Some ports on PSoC 4 devices such as ports 5, 6
and 7 on PSoC 4100M / 4200M do not have Port Interrupts that can provide wakeup from
chip deep-sleep mode. This means that although you may connect an interrupt to the IRQ
terminal on the Pins component, the interrupt will only be able to provide wakeup
functionality from chip sleep mode. If you wish to wake up the device from chip deepsleep or hibernate using pins on these ports, you must use another hardware resource
called Combined Port Interrupt (AllPortInt) signal provided by the Global Signal
Reference component. Refer to Combined_Port_Interrupt Code Example for sample
usage.
To use this feature, follow these instructions:
a. Configure the pin to generate an interrupt using the Interrupt parameter.
b. If the pin does not have a port adapter (as described in PSoC Port Adapter), then
make sure that those settings are configured to not use those features.
Document Number: 001-98278 Rev. *A
Page 37 of 46
PSoC® Creator™ Component Datasheet
Pins
c. Uncheck the Dedicated Interrupt check box. This will configure the interrupt
generation registers to be able to use the Combined Port Interrupt, while not having
to use the dedicated port interrupt.
Note It is also possible for you to use both the dedicated port interrupt and the
AllPortInt signal. However you will need to handle both ISRs as they will both
need to be serviced. That is, the AllPortInt signal triggers even for the interrupts
triggered via dedicated port interrupt.
d. Use the Global Signal Reference component's AllPortInt signal and attach an
Interrupt component to it.
Note As mentioned previously, the AllPortInt signal triggers even for the interrupts
triggered via the dedicated port interrupt. Therefore, if you use the dedicated port
interrupt on a port, then that interrupt should be higher priority than the AllPortInt
interrupt so that it gets serviced first. Otherwise, the interrupt trigger sequence will
not be predictable. Hence identifying and clearing the interrupt source will be
difficult.
e. In the ISR of the interrupt, insert a routine to check for the interrupt status register
(Pin_INTSTAT, where Pin is the instance name of the component) for the port that
the pin is placed in. Then call Pin_ClearInterrupt() API to clear that particular port's
interrupt. Repeat the process for all ports in the ISR. You may also use the
Pin_INTR_CAUSE register to determine which port caused the interrupt to trigger.
Note If the ISR for the dedicated port interrupt was already serviced and the
interrupt was cleared, then you do not need to check for that port in the AllPortInt
ISR.
Resources
Each Pins component consumes one physical pin per bit of the Number of Pins parameter.
Page 38 of 46
Document Number: 001-98278 Rev. *A
PSoC® Creator™ Component Datasheet
Pins
DC and AC Electrical Characteristics
Specifications are valid for –40 °C ≤ TA ≤ 85 °C and TJ ≤ 100 °C, except where noted.
Specifications are valid for 1.71 V to 5.5 V, except where noted.
Note Final characterization data for PSoC 4000S, PSoC 4100S and PSoC Analog Coprocessor
devices is not available at this time. Once the data is available, the component datasheet will be
updated on the Cypress web site.
PSoC 4 Pins DC Specifications
Parameter
VIH
VIL
Description
Conditions
VOL
Typ
Max
Units
Input voltage high threshold
CMOS Input
Must not exceed VDDD + 0.2 V
0.7 x VDDD
–
–
V
LVTTL Input
VDDD ≥ 2.7 V, Must not exceed
VDDD + 0.2 V
2.0
–
–
V
Differential input (SIO)
Hysteresis Disabled
Vref + 0.2
–
–
V
–
–
0.3 x VDDD
V
Input voltage low threshold
CMOS input
VOH
Min
LVTTL input
VDDD ≥ 2.7 V
–
–
0.8
V
Differential input (SIO)
Hysteresis Disabled
–
–
Vref + 0.2
V
High level at 3V
IOH = 4 mA at 3 V VDDD
VDDD – 0.6
–
–
V
High level at 1.8 V
IOH = 1 mA at 1.8 V VDDD
VDDD – 0.5
–
–
V
SIO, unregulated mode
IOH = 4 mA at 3.3 V VDDD
VDDD – 0.4
–
–
V
SIO regulated mode
IOH= 1 mA
Vref – 0.65
–
Vref + 0.2
V
IOH= 0.1 mA
Vref – 0.3
–
Vref + 0.2
V
Low level at 1.8 V
IOL = 4 mA at 1.8 V VDDD
–
–
0.6
V
Low level at 3 V
IOL = 8 mA at 3 V VDDD
–
–
0.6
V
Low level at 3 V, less IOL
IOL = 3 mA at 3 V VDDD
–
–
0.4
V
OVT GPIO
IOL = 20 mA, VDDD > 2.9 V
–
–
0.4
V
SIO, regulated mode
IOL = 25 mA, VDDIO = 3.3 V
–
–
0.8
V
IOL= 4 mA, VDDIO= 1.8 V
–
–
0.4
V
0.48
–
0.52 x
VDDIO
V
VDDIO > 3.3 V
1
–
VDDIO – 1
V
VDDIO < 3.3 V
1
–
VDDIO –
0.5
V
Output voltage high level
Output voltage low level
Vinref
SIO, Input voltage
reference
Voutref
SIO, Output voltage
reference (regulated mode)
Document Number: 001-98278 Rev. *A
Page 39 of 46
PSoC® Creator™ Component Datasheet
Pins
Parameter
Description
Conditions
Min
Typ
Max
Units
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, VDDD = 3.0 V
–
–
2
nA
CTBM GPIO pins
–
–
–
4
nA
OVT GPIO
25 °C, VDDD = 0 V,
VIH = 3.0 V
–
–
10
nA
SIO
VIH ≤ VDDSIO; 25 °C
–
–
14
nA
VIH > VDDSIO; 25 °C
–
–
10
nA
–
–
–
7
pF
CMOS input
Guaranteed by characterization
0.05 x VDDD
–
–
mV
LVTTL input
VDDD ≥ 2.7 V. Guaranteed by
characterization
25
40
–
mV
SIO input
Single-ended mode
–
40
–
mV
Differential mode
–
35
–
mV
CIN
Input Capacitance
VH
Input Hysteresis
IDIODE
Current through protection
diode to VDD/Vss
Guaranteed by characterization
–
–
100
uA
ITOT_GPIO
Maximum Total Source or
Sink Chip Current
Guaranteed by characterization
–
–
200
mA
Min
Typ
Max
Units
2
–
12
ns
1.5
–
12
ns
2
–
12
ns
PSoC 4 Pins AC Specifications
Parameter
TriseF
TfallF
TriseS
TfallS
Page 40 of 46
Description
Conditions
Rise time in fast strong mode
Cload = 25 pF, VDDIO = 3.3 V
OVT GPIO rise time in fast strong mode
25-pF load, 10%–90%,
VDD=3.3 V
Fall time in fast strong mode
Cload = 25 pF, VDDIO = 3.3 V
OVT GPIO fall time in fast strong mode
25-pF load, 10%–90%,
VDD=3.3 V
1.5
–
12
ns
Rise time in slow strong mode
Cload = 25 pF, Vddio = 3.3 V
10
–
60
ns
OVT GPIO rise time in Slow-Strong mode
25-pF load, 10%–90%,
VDD=3.3 V
10
–
60
ns
SIO rise time in Slow-Strong mode
Cload = 25 pF, Vddio = 3.3 V
–
–
75
ns
Fall time in slow strong mode
Cload = 25 pF, Vddio = 3.3 V
10
–
60
ns
OVT GPIO fall time in Slow-Strong mode
25-pF load, 10%–90%,
VDD=3.3 V
10
–
60
ns
Document Number: 001-98278 Rev. *A
PSoC® Creator™ Component Datasheet
Parameter
Pins
Description
Conditions
Min
Typ
Max
Units
Cload = 25 pF, Vddio = 3.3 V
–
–
70
ns
GPIO, 3.3 V < VDDIO < 5.5 V, fast strong drive
mode
90/10%, 25 pF load, 60/40 duty
cycle
–
–
33
MHz
OVT GPIO, 3.3 V < VDDIO < 5.5 V, fast strong
drive mode
90/10%, 25 pF load, 60/40 duty
cycle
–
–
24
MHz
GPIO, 1.7 V < VDDIO < 3.3 V, fast strong drive
mode
90/10%, 25 pF load, 60/40 duty
cycle
–
–
16.7
MHz
OVT GPIO, 1.71 V < VDDIO < 3.3 V, fast strong
drive mode
90/10%, 25 pF load, 60/40 duty
cycle
–
–
16
MHz
GPIO, 3.3 V < VDDIO < 5.5 V, slow strong drive
mode
90/10%, 25 pF load, 60/40 duty
cycle
–
–
7
MHz
GPIO, 1.7 V < VDDIO < 3.3 V, slow strong drive
mode
90/10%, 25 pF load, 60/40 duty
cycle
–
–
3.5
MHz
Fgpioin
GPIO input operating frequency, 1.71 V ≤ VDDD
≤ 5.5 V
90/10% VIO
–
–
48
MHz
Fsioout
SIO output operating frequency
90/10% VDDIO into 25 pF
–
–
33
MHz
1.71 V < VDDIO < 3.3 V, Unregulated output, fast 90/10% VDDIO into 25 pF
strong drive mode
–
–
16
MHz
3.3 V < VDDIO < 5.5 V, Unregulated output, slow
strong drive mode
90/10% VDDIO into 25 pF
–
–
5
MHz
1.71 V < VDDIO < 3.3 V, Unregulated output,
slow strong drive mode
90/10% VDDIO into 25 pF
–
–
3.5
MHz
3.3 V < VDDIO < 5.5 V, Regulated output, fast
strong drive mode
Output continuously switching
into 25 pF
–
–
20
MHz
1.71 V < VDDIO < 3.3 V, Regulated output, fast
strong drive mode
Output continuously switching
into 25 pF
–
–
10
MHz
1.71 V < VDDIO < 5.5 V, Regulated output, slow
strong drive mode
Output continuously switching
into 25 pF
–
–
2.5
MHz
–
–
48
MHz
SIO fall time in Slow-Strong mode
Fgpioout
GPIO output operating frequency
3.3 V < VDDIO < 5.5 V, Unregulated output, fast
strong drive mode
Fsioin
SIO input operating frequency, 1.71 V < VDDIO < 90/10% VIO
5.5 V
PSoC 3 and PSoC 5LP Pins DC Specifications
Parameter
Description
VINMAX
Maximum input voltage
VINREF
Input voltage reference
(Differential input mode)
Document Number: 001-98278 Rev. *A
Conditions
All allowed values of VDDIO
and VDDD
Min
Typ
Max
Units
–
–
5.5
V
0.5
–
0.52 VDDIO
V
Page 41 of 46
PSoC® Creator™ Component Datasheet
Pins
Parameter
VOUTREF
VIH
Description
Conditions
Min
Typ
Max
Units
VDDIO > 3.7
1
–
VDDIO – 1
V
VDDIO < 3.7
1
–
VDDIO – 0.5
V
CMOS input
0.7  VDDIO
–
–
V
2.0
–
–
V
SIO_ref + 0.2
–
–
V
CMOS input
–
–
0.3 VDDIO
V
LVTTL input, VDDIO ≥2.7V
–
–
0.8
V
Hysteresis disabled
–
–
SIO_ref – 0.2
V
VDDIO – 0.4
–
–
V
Output voltage reference (Regulated output mode)
Input voltage high threshold
GPIO mode
LVTTL input, VDDIO ≥2.7V
Differential input mode
VIL
Input voltage low threshold
GPIO mode
Differential input mode
VOH
VOL
Hysteresis disabled
Output voltage high
Unregulated mode
IOH = 4 mA, VDDIO = 3.3 V
Regulated mode
IOH = 1 mA
SIO_ref – 0.65
–
SIO_ref + 0.2
V
Regulated mode
IOH = 0.1 mA
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
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)
CIN
VH
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
PSoC 3
–
–
7
pF
PSoC 5LP
–
–
9
pF
–
40
–
mV
Input Capacitance[1]
Input voltage hysteresis (Schmitt-Trigger)[1]
PSoC 3
1.
[1]
Single-ended mode (GPIO
mode)
Based on device characterization (Not production tested).
Page 42 of 46
Document Number: 001-98278 Rev. *A
PSoC® Creator™ Component Datasheet
Parameter
Description
PSoC 5LP
IDIODE
Pins
Conditions
Min
Typ
Max
Units
Differential mode
–
35
–
mV
Single-ended mode (GPIO
mode)
–
115
–
mV
Differential mode
–
50
–
mV
–
–
100
µA
Current through protection
diode to VSSIO
PSoC 3 and PSoC 5LP Pins AC Specifications
Parameter
Description
Conditions
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
3.3 V < VDDIO < 5.5 V, Unregulated output
(GPIO) mode, fast strong drive mode
90/10% VDDIO into 25 pF
–
–
33
MHz
1.71 V < VDDIO < 3.3 V, Unregulated output
(GPIO) mode, fast strong drive mode
90/10% VDDIO into 25 pF
–
–
16
MHz
3.3 V < VDDIO < 5.5 V, Unregulated output
(GPIO) mode, slow strong drive mode
90/10% VDDIO into 25 pF
–
–
5
MHz
1.71 V < VDDIO < 3.3 V, Unregulated output
(GPIO) mode, slow strong drive mode
90/10% VDDIO into 25 pF
–
–
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, Output continuously switching
fast strong drive mode
into 25 pF
–
–
10
MHz
1.71 V < VDDIO < 5.5 V, Regulated output mode, Output continuously switching
slow strong drive mode
into 25 pF
–
–
2.5
MHz
–
–
66
MHz
TriseF
Rise time in fast strong mode (90/10%) [1]
TfallF
Fall time in fast strong mode (90/10%)
[1]
[1]
TriseS
Rise time in slow strong mode (90/10%)
TfallS
Fall time in slow strong mode (90/10%) [1]
Fsioout
SIO output operating frequency
Fsioin
SIO input operating frequency
1.71 V < VDDIO < 5.5 V
90/10% VDDIO
References
For more information on the advanced features of this component, refer to following references.

AN86439 (PSoC 4 Using GPIO PIns)
Document Number: 001-98278 Rev. *A
Page 43 of 46
PSoC® Creator™ Component Datasheet
Pins


AN72382 (Using PSoC 3 and PSoC 5LP GPIO pins)
AN60580 (SIO Tips and Tricks in PSoC®3 / PSoC 5LP)
Component Changes
This section lists the major changes in the component from the previous version.
Version
Description of Changes
Reason for Changes / Impact
2.20.a
Edited datasheet.
Final characterization data for PSoC 4000S,
PSoC 4100S and PSoC Analog Coprocessor devices is
not available at this time. Once the data is available, the
component datasheet will be updated on the Cypress
web site.
2.20
Digital software pins no longer show wires on Terminals and wires for SW pins are not needed on the
the schematic
schematic since nothing can be connected to them.
Added SetInterruptMode() API
Allows the pin interrupt trigger mode to change during
run-time.
Added PSoC 4 SIO and USBIO support
PSoC 4200L support.
Added I2C HS slew rate options
Supports slew rate definition to meet I2C HS
specification.
Added Sleep() and Wakeup() APIs for
PSoC 4 devices
PSoC 4 SIO and USBIO pins must be configured in
preparation for chip deep-sleep and hibernate modes.
The functions allow restoration of pin configuration upon
wakeup from chip deep-sleep and hibernate modes.
2.10.c
Added information for using interrupts on
PSoC 4 ports that do not have PICU.
PSoC 4100M and PSoC 4200M devices introduce ports
that do not have dedicated PICUs. To use interrupts on
these ports, you must use the Global Signal Reference
component.
Added information regarding drive mode
restrictions for direct connections of
peripherals to pins.
Some peripherals impose drive mode restrictions when
directly connected to dedicated pins.
Added References section.
References to Pins application notes.
2.10.b
Updated datasheet.
Updated change history to include v2.5.
2.10.a
Updated datasheet.
Added OVT GPIO characterization data.
2.10
Added GPIO_OVT support.
New pin type supported in BLE devices.
Added PSoC 3 and PSoC 5LP per-pin APIs
compatibility for PSoC 4 designs.
Allows PSoC 3 and PSoC 5LP per-pin APIs to be used
in PSoC 4 designs.
Merged contents of Type and General
subtabs into General subtab.
Easier to observe Pin type affecting the default drive
mode and initial drive state values.
Page 44 of 46
Document Number: 001-98278 Rev. *A
PSoC® Creator™ Component Datasheet
Version
Pins
Description of Changes
Reason for Changes / Impact
Initial state parameter text changed to "Initial
drive state". When the pin is a PSoC 4 HW
digital output, the parameter is fixed and is
not configurable.
PSoC 4 HW digital output is driven by the signal
connected to it and hence the initial drive state
parameter should not be used.
2.5
Fixed a firmware bug that switched the POR
settings for "Pulled-Up" and "Pulled-Down"
modes; removed the Errata section.
To address a glitch with POR settings at power up.
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 (CY8C40xx)
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
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
Document Number: 001-98278 Rev. *A
Page 45 of 46
PSoC® Creator™ Component Datasheet
Pins
Version
Description of Changes
1.60.a
Minor datasheet edits and updates
1.60
Added External Terminal capability
Reason for Changes / Impact
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, 2015-2016. This document is the property of Cypress Semiconductor Corporation and its subsidiaries, including Spansion LLC (“Cypress”). This
document, including any software or firmware included or referenced in this document (“Software”), is owned by Cypress under the intellectual property laws and treaties of the United States and
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