PSoC® Creator™ Component Datasheet
PSoC 4 Low Power Comparator (LPComp)
2.20
Features
Low input offset
User controlled offset calibration
Multiple speed modes
Low-power mode
Wake from low power modes
Multiple interrupt and output modes
General Description
The Low Power Comparator (LPComp) component provides access to the low power
comparators implemented using the fixed function LP comparator block that is present in
PSoC 4.
When to Use a LPComp
The main purpose of these comparators is to offer fast detection of a voltage change in normal
operating modes and ultra-low power operation in hibernate mode. The two connection options
are described as follows:
Compare two voltages on external pins.
Compare a voltage from an external pin against an internally generated signal.
The comparator output value can be inspected by the CPU. The comparator interrupt output
signal is ORed together with interrupt output signal from the other low power comparator on the
device as combined interrupt source. Interrupt is not cleared automatically. It is user
responsibility to do that. This combined signal is available as the output of the global signal
reference component and can be used as an interrupt/wakeup source from deep-sleep or
hibernate. Refer to the Operation in Low Power Mode section for more details.
For all except PSoC 4100 / PSoC 4200 families, the comparator output is available directly, or
after synchronous edge detection as level or pulse. It can be used to trigger an interrupt, routed
to digital logic or sent to a pin. Refer to the Functional Description section for details.
Cypress Semiconductor Corporation • 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600
Document Number: 002-11086 Rev. **
Revised February 11, 2016
PSoC 4 Low Power Comparator (LPComp)
PSoC® Creator™ Component Datasheet
Input/Output Connections
This section describes the various input and output connections for the LPComp. The symbol for
this component is annotated to denote the selection of hysteresis.
Positive Input – Analog Input
This input is usually connected to the voltage that is being compared. This input can be routed
from a GPIO or from an internal source. When connected to an internal source the GPIO that is
dedicated to this input will be consumed and not available for other uses.
Negative Input – Analog Input
This input is usually connected to the reference voltage. This input can be routed from a GPIO or
from an internal source. When connected to an internal source the GPIO that is dedicated to this
input will be consumed and not available for other uses.
Comparator Out – Output
For PSoC 4100 / PSoC 4200 families it is the edge detected comparison output. For these
devices the direct result of the comparator is not available as a hardware signal. This output is
normally connected to an interrupt.
For all other PSoC 4 devices, the component output is configurable (refer to the Output
Configuration section): either direct comparator out or after synchronous edge detection as level
or pulse. It can be used to trigger an interrupt, routed to digital logic or sent to a pin. Refer to the
Functional Description section for details.
Note This output cannot be used to awake a part from the Low Power Modes. Global Signal
Reference interrupt signal must be used instead.
Page 2 of 22
Document Number: 002-11086 Rev. **
PSoC® Creator™ Component Datasheet
PSoC 4 Low Power Comparator (LPComp)
Component Parameters
Drag an LPComp onto your design and double click it to open the Configure dialog. This dialog
has the following tabs with different parameters.
General Tab
The LPComp provides the following parameters.
Document Number: 002-11086 Rev. **
Page 3 of 22
PSoC 4 Low Power Comparator (LPComp)
PSoC® Creator™ Component Datasheet
Output Configuration
This parameter defines mode of the LPComp output: Direct, Synchronized, or Pulse. For
PSoC 4100 / PSoC 4200 families, a pulse is generated when the selected edge occurs on the
internal comparison signal. Refer to the Functional Description section for details.
Hysteresis
This parameter allows you to add approximately 10 mV of hysteresis to the LPComp. This helps
to ensure that slowly moving voltages or slightly noisy voltages will not cause the output of the
LPComp to oscillate when the two input voltages are nearly equal.
Pulse/Interrupt Configuration
This parameter defines the event that will cause a pulse to be generated on the interrupt terminal
or direct comparator output. The parameter allows you to select interrupt/output mode: Disabled,
Rising edge, Falling edge, or Both edges.
Speed/Power
This parameter provides a way to optimize speed verses power consumption. The Speed/Power
parameter allows you to select the speed/power level: Slow/Ultra low, Medium/Low,
Fast/Normal.
Interrupt Enabled
This parameter allows you to configure the Interrupt Mask (except PSoC 4100 / PSoC 4200
families).
Page 4 of 22
Document Number: 002-11086 Rev. **
PSoC® Creator™ Component Datasheet
PSoC 4 Low Power Comparator (LPComp)
Advanced Tab
Legacy output position
This parameter allows you to configure the comparator output position for legacy support.
By default, the Legacy output position option is selected when a design is being migrated from
an existing design for PSoC 4100 / PSoC 4200 families. If the LPComp component is placed in a
design for the first time, the Legacy output position option will not be selected by default.
The symbol view will change for this option as follows:
Document Number: 002-11086 Rev. **
Page 5 of 22
PSoC 4 Low Power Comparator (LPComp)
PSoC® Creator™ Component Datasheet
Application Programming Interface
Application Programming Interface (API) routines allow you to configure the component using
software. The following table lists and describes the interface to each function. The subsequent
sections cover each function in more detail.
By default, PSoC Creator assigns the instance name "LPComp_1" to the first instance of a
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
"LPComp"
Functions
Function
Description
LPComp_Start()
Performs all of the required initialization for the component and enables
power to the block.
LPComp_Stop()
Turns off the LP Comparator block.
LPComp_Init()
Initializes or restores the component according to the customizer
settings.
LPComp_Enable()
Activates the hardware and begins component operation.
LPComp_GetCompare()
This function returns a nonzero value when the voltage connected to the
positive input is greater than the negative input voltage.
LPComp_SetSpeed()
Sets the power and speed to one of three settings.
LPComp_SetHysteresis()
Enables or disables the hysteresis setting.
LPComp_ZeroCal()
Performs custom calibration of the input offset to minimize error for a
specific set of conditions.
LPComp_LoadTrim()
Writes a value into the comparator offset trim register.
LPComp_SetOutputMode()
Set comparator output mode (Direct, Synchronized or Pulse)
LPComp_SetInterruptMode()
Sets the interrupt edge detect mode.
LPComp_GetInterruptSource()
Gets the interrupt requests.
LPComp_ClearInterrupt()
Clears the interrupt request.
LPComp_SetInterrupt()
Sets a software interrupt request.
LPComp_SetInterruptMask()
Set interrupt mask. (Not applicable for PSoC 4100 / PSoC 4200.)
LPComp_GetInterruptMask()
Returns interrupt mask. (Not applicable for PSoC 4100 / PSoC 4200.)
LPComp_GetInterruptSourceMasked()
Returns interrupt request register masked by interrupt mask. (Not
applicable for PSoC 4100 / PSoC 4200.)
Page 6 of 22
Document Number: 002-11086 Rev. **
PSoC® Creator™ Component Datasheet
PSoC 4 Low Power Comparator (LPComp)
void LPComp_Start(void)
Description:
Performs all of the required initialization for the component and enables power to the block.
The first time the routine is executed, the component is initialized to the configuration from
the customizer. When called to restart the comparator following a LPComp_Stop() call, the
current component parameter settings are retained.
Parameters:
None
Return Value:
None
Side Effects:
None
void LPComp_Stop(void)
Description:
Turns off the LP Comparator.
Parameters:
None
Return Value:
None
Side Effects:
The function doesn’t change component power settings.
void LPComp_Init(void)
Description:
Initializes or restores the component according to the customizer settings. It is not
necessary to call LPComp_Init() because the LPComp_Start() API calls this function and is
the preferred method to begin component operation.
Parameters:
None
Return Value:
None
Side Effects:
None
void LPComp_Enable(void)
Description:
Activates the hardware and begins component operation. It is not necessary to call
LPComp_Enable() because the LPComp_Start() API calls this function, which is the
preferred method to begin component operation.
Parameters:
None
Return Value:
None
Side Effects:
None
Document Number: 002-11086 Rev. **
Page 7 of 22
PSoC® Creator™ Component Datasheet
PSoC 4 Low Power Comparator (LPComp)
uint32 LPComp_GetCompare(void)
Description:
This function returns a nonzero value when the voltage connected to the positive input is
greater than the negative input voltage.
This function reads the direct (unflopped) comparator output, which can also be metastable
(since it may result in incorrect data).
Parameters:
None
Return Value:
Comparator output state. This value is not impacted by the interrupt edge detect setting.
Side Effects:
None
void LPComp_SetSpeed(uint32 speed)
Description:
Sets the power and speed to one of three settings.
Parameters:
speed: Enumerated speed mode value
Name
Description
LPComp_LOW_SPEED
Slow speed / Ultra low power
LPComp_MED_SPEED
Medium speed / Low power
LPComp_HIGH_SPEED
High speed / Normal power
Return Value:
None
Side Effects:
None
void LPComp_SetHysteresis(uint32 hysteresis)
Description:
Enables or disables the hysteresis setting.
Parameters:
hysteresis: Hysteresis enable. See table below.
Name
LPComp_HYST_ENABLE
Enable hysteresis
LPComp_HYST_DISABLE
Disable hysteresis
Return Value:
None
Side Effects:
None
Page 8 of 22
Description
Document Number: 002-11086 Rev. **
PSoC® Creator™ Component Datasheet
PSoC 4 Low Power Comparator (LPComp)
uint32 LPComp_ZeroCal(void)
Description:
Performs custom calibration of the input offset to minimize error for a specific set of
conditions: comparator reference voltage, supply voltage, and operating temperature. A
reference voltage in the range at which the comparator will be used must be applied to the
negative input. The positive input will be disconnected from the external source and
shorted internally to the negative input to perform the offset calibration.
Parameters:
None
Return Value:
The value from the comparator trim register after the offset calibration is complete. This
value has the same format as the input parameter for the LPComp_LoadTrim() API routine.
Side Effects:
During this function the positive input terminal is disconnected. This may impact other
components that are also using this signal.
void LPComp_LoadTrim(uint32 trimVal)
Description:
This function writes a value into the comparator offset trim register.
Parameters:
trimVal: Value to be stored in the comparator offset trim register. This value has the same
format as the parameter returned by the LPComp_ZeroCal() API routine.
Return Value:
None
Side Effects:
None
void LPComp_SetOutputMode (uint32 mode)
Description:
Set comparator output mode.
Parameters:
mode: Comparator output mode value. See table below.
Name
Description
LPComp_OUT_DIRECT
Direct output
LPComp_OUT_SYNC
Synchronized output
LPComp_OUT_PULSE
Pulse output
Return Value:
None
Side Effects:
None
Document Number: 002-11086 Rev. **
Page 9 of 22
PSoC® Creator™ Component Datasheet
PSoC 4 Low Power Comparator (LPComp)
void LPComp_SetInterruptMode(uint32 mode)
Description:
Sets the interrupt edge detect mode. This also controls the value provided on the output.
Parameters:
mode: Enumerated edge detect mode value. See table below.
Name
Description
LPComp_INTR_DISABLE
Disable
LPComp_INTR_RISING
Rising edge detect
LPComp_INTR_FALLING
Falling edge detect
LPComp_INTR_BOTH
Detect both edges
Return Value:
None
Side Effects:
None
uint32 LPComp_GetInterruptSource(void)
Description:
Gets the interrupt requests. This function is used with the combined interrupt signal from
the global signal reference. This function from either component instance can be used to
determine the interrupt source for both the interrupts combined.
Parameters:
None
Return Value:
Interrupt source. Each component instance has a mask value: LPComp_INTR.
Side Effects:
None
void LPComp_ClearInterrupt(uint32 interruptMask)
Description:
Clears the interrupt request. This function is used with the combined interrupt signal from
the global signal reference. This function from either component instance can be used to
clear either or both interrupts.
Parameters:
interruptMask: Mask of interrupts to clear. Each component instance has a mask value:
LPComp_INTR.
Return Value:
None
Side Effects:
None
Page 10 of 22
Document Number: 002-11086 Rev. **
PSoC® Creator™ Component Datasheet
PSoC 4 Low Power Comparator (LPComp)
void LPComp_SetInterrupt(uint32 interruptMask)
Description:
Sets a software interrupt request. This function is used with the combined interrupt signal
from the global signal reference. This function from either component instance can be used
to trigger either or both software interrupts.
Parameters:
interruptMask: Mask of interrupts to set. Each component instance has a mask value:
LPComp_INTR.
Return Value:
None
Side Effects:
None
void LPComp_SetInterruptMask (uint32 interruptMask)
Description:
Configures which bits of interrupt request register will trigger an interrupt event. This API is
not applicable for PSoC 4100 / PSoC 4200 devices.
Parameters:
interruptMask: bit-mask of interrupt sources to be enabled. Each component instance has
a mask value: LPComp_INTR_MASK.
Return Value:
None
Side Effects:
None
uint32 LPComp_GetInterruptMask (void)
Description:
Returns interrupt mask. This API is not applicable for PSoC 4100 / PSoC 4200 devices.
Parameters:
None
Return Value:
Mask of enabled interrupt source. Each component instance has a mask value:
LPComp_INTR_MASK.
Side Effects:
None
uint32 LPComp_GetInterruptSourceMasked (void)
Description:
Returns interrupt request register masked by interrupt mask.
Returns the result of bitwise AND operation between corresponding interrupt request and
mask bits. This API is not applicable for PSoC 4100 / PSoC 4200 devices.
Parameters:
None
Return Value:
Mask of enabled interrupt source. Each component instance has a mask value:
LPComp_INTR_MASKED.
Side Effects:
None
Document Number: 002-11086 Rev. **
Page 11 of 22
PSoC® Creator™ Component Datasheet
PSoC 4 Low Power Comparator (LPComp)
Global Variables
Function
Description
LPComp_initVar
Indicates whether the Low Power Comparator has been initialized. The variable is initialized
to 0 and set to 1 the first time LPComp_Start() is called. This allows the component to
restart without reinitialization after the first call to the LPComp_Start() routine.
If reinitialization of the component is required, call LPComp_Init() before calling
LPComp_Start(). Alternatively, the Comparator can be reinitialized by calling the
LPComp_Init() and LPComp_Enable() functions
Sample Firmware Source Code
PSoC Creator provides numerous 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. Project deviations are
described in the MISRA Compliance section of the System Reference Guide along with
information on the MISRA compliance verification environment.
The LPComp component has the following specific deviations:
MISRA-C:
2004 Rule
19.7
Page 12 of 22
Rule Class
(Required/Advisory)
A
Rule Description
Description of Deviation(s)
A function is used in preference
to a function-like macro.
Deviated since function-like macros
are used to allow more efficient code.
Document Number: 002-11086 Rev. **
PSoC® Creator™ Component Datasheet
PSoC 4 Low Power Comparator (LPComp)
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 an 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 4 (GCC)
PSoC 4100/PSoC 4200
Other PSoC 4 Devices
Configuration
Default
Flash Bytes
SRAM Bytes
Flash Bytes
SRAM Bytes
552
8
700
8
Document Number: 002-11086 Rev. **
Page 13 of 22
PSoC 4 Low Power Comparator (LPComp)
PSoC® Creator™ Component Datasheet
Functional Description
The Low Power Comparator is intended to be operational in all power modes, including
Hibernate/Deep Sleep. The main purpose of this component is to offer fast detection capability in
normal operating modes and ultra-low power operation in hibernate mode.
LPComp can be offset calibrated. However, even without trim, the offset is around 10 mV, and
thus it is not recommended to trim it.
Block Diagram and Configuration
The following is a high-level block diagram.
In PSoC 4 devices (except PSoC 4100 / PSoC 4200) each comparator has one HW output. It
comes from three sources:
Direct comparator output
Synchronized to SYSCLK using two flip-flops
Edge detected pulse which have period 2*SYSCLK.
Page 14 of 22
Document Number: 002-11086 Rev. **
PSoC® Creator™ Component Datasheet
PSoC 4 Low Power Comparator (LPComp)
Individual comparator interrupt outputs are ORed together as single asynchronous interrupt
source before sent out and used to wakeup system in low power mode. For all devices except
PSoC 4100 /4200 families, the individual comparator interrupt is masked by INTR_MASK. The
masked result is captured in INTR_MASKED register. Writing 1 to INTR register bit will clear the
interrupt. Refer to the appropriate device Technical Reference Manual (TRM) for a detailed
description of the registers.
Interrupt Service Routine
The LPComp supports interrupts on the various events, depends on Pulse/Interrupt configuration
settings: Rising edge, Falling edge, or both edges. Interrupt signal goes high when any of the
enabled interrupt configurations are true.
Note Interrupt is not cleared automatically. It is user responsibility to do that. Interrupt is cleared
by writing a ‘1’ in corresponding interrupt register bit position. The preferred way to clear interrupt
sources is usage LPComp_ClearInterrupt(LPComp_INTR) API.
There are two ways for access to the LPComp interrupt depending on the Legacy output position
option.
Legacy output position option is set.
Legacy output position option is NOT set.
The following code is suggested:
CY_ISR(LPComp_Interrupt)
{
/* Interrupt does not clear automatically.
* It is user responsibility to do that.
*/
LPComp_ClearInterrupt(LPComp_INTR);
/*
* Add user interrupt code to manage interrupt.
*/
}
Document Number: 002-11086 Rev. **
Page 15 of 22
PSoC 4 Low Power Comparator (LPComp)
PSoC® Creator™ Component Datasheet
void main()
{
isr_StartEx(LPComp_Interrupt);
LPComp_Start();
CyGlobalIntEnable; /* Enable global interrupts. */
for(;;)
{
/* Place your application code here. */
}
}
Operation in Low Power Mode
Low Power Comparator operates in Deep Sleep/Hibernate Mode only if Speed/Power option is
set to Slow/Ultra low. This component can be used along with the Global Signal component as
a wakeup source from Deep Sleep/Hibernate mode as described below.
Create schematic next schematic.
The option “Combined low power comparator interrupt (LPCompInt)” should be selected as a
source for an interrupt in the Global Signal Reference component. This component triggers the
output each time any of the enabled low power comparators generates an interrupt.
Note Make sure that both input signals are valid during operation in Low Power Mode (that is,
that the the signal sources (especially components) work in Low Power Mode). Otherwise, if any
of the input signals is not determined, then the LPComp component’s output would also be
incorrect.
Page 16 of 22
Document Number: 002-11086 Rev. **
PSoC® Creator™ Component Datasheet
PSoC 4 Low Power Comparator (LPComp)
The LPComp component input pins must be assigned to dedicated inputs only (P0[0], P0[1] for
LPCOMP0, and P0[2], P0[3] for LPCOMP1 in case of the PSoC 4100/PSoC 4200). Refer to the
device datasheet for the part being used for the specific physical pin connections.
The wakeup event is when the voltage connected to the positive input (Pin_1) is greater than the
negative input voltage (Pin_2).
The following code is suggested:
CY_ISR(LPComp_Interrupt)
{
/* Interrupt does not clear automatically.
* It is user responsibility to do that.
*/
LPComp_ClearInterrupt(LPComp_INTR);
/*
* Add user interrupt code to manage interrupt.
*/
}
void main()
{
isr_StartEx(LPComp_Interrupt);
LPComp_Start();
CyGlobalIntEnable;
/* Enable global interrupts. */
LPComp_SetInterruptMode(LPComp_INTR_RISING);
LPComp_SetInterruptMask(LPComp_INTR_MASK);
for(;;)
{
/* Place your application code here. */
CySysPmDeepSleep(); /* Enter Deep Sleep mode*/
/* Place your application code here. */
}
}
Document Number: 002-11086 Rev. **
Page 17 of 22
PSoC 4 Low Power Comparator (LPComp)
PSoC® Creator™ Component Datasheet
Placement
Each comparator is directly connected to specific GPIOs for its inputs. The output connection is
routed to the digital fabric. Refer to the device datasheet for the part being used for the specific
physical pin connections.
Registers
See the chip Technical Reference Manual (TRM) for more information about registers.
Component Debug Window
PSoC Creator allows you to view debug information about components in your design. Each
component window lists the memory and registers for the instance. For detailed hardware
registers descriptions, refer to the appropriate device technical reference manual. For detailed
UDB registers descriptions used in the component, refer to the Registers section of this
datasheet.
To open the Component Debug window:
1. Make sure the debugger is running or in break mode.
2. Choose Windows > Components… from the Debug menu.
3. In the Component Window Selector dialog, select the component instances to view and
click OK.
The selected Component Debug window(s) will open within the debugger framework. Refer to
the "Component Debug Window" topic in the PSoC Creator Help for more information.
Resources
This component uses one of the LP Comparators from the pair of comparators in the LP
Comparator hardware block.
Page 18 of 22
Document Number: 002-11086 Rev. **
PSoC® Creator™ Component Datasheet
PSoC 4 Low Power Comparator (LPComp)
DC and AC Electrical Characteristics
Specifications are valid for 2.2 V to 5.5 V @ –40 °C ≤ TA < 0 °C, except where noted.
Specifications are valid for 1.8 V to 5.5 V @ 0 °C ≤ TA ≤ 85 °C and TJ ≤ 100 °C, except where
noted.
DC Specifications
Parameter
Description
Conditions
Min
Typ
Max
Units
–
–
±4
mV
VOFFSET2
Input offset voltage, custom trim
VOFFSET2
Input offset voltage, custom trim
For PSoC 4 BLE family
–
–
±6
mV
VOFFSET2
Input offset voltage. Common Mode
Voltage Range from 0 to VDD-1
For PSoC 4100M/
PSoC 4200M/
PSoC 4200L families
–
–
±4
mV
VHYST
Hysteresis when enabled
–
10
35
mV
VHYST
Hysteresis when enabled. Common
Mode Voltage Range from 0 to VDD -1.
For PSoC 4100M/
PSoC 4200M/
PSoC 4200L families
–
10
35
mV
VICM1
Input common mode voltage in normal
mode
Modes 1 and 2
0
–
VDDD –
0.1
V
VICM1
Input common mode voltage in normal
mode
Modes 1 and 2,
0
-
VDDD –
0.2
V
For PSoC 4200L family
VICM2
Input common mode voltage in low
power mode
0
–
VDDD
V
VICM2
Input common mode voltage in ultra low
power mode
0
–
VDDD –
1.15
V
CMRR
Common mode rejection ratio
VDDD ≥ 2.7V
50
–
–
dB
CMRR
Common mode rejection ratio
VDDD < 2.7V
42
–
–
dB
ICMP1
Block current, normal mode
–
–
280
µA
ICMP1
Block current, normal mode
For PSoC 4 BLE, PSoC
4100M/ PSoC 4200M
families
–
–
400
µA
ICMP1
Block current, normal mode
For PSoC 4200L family
-
280
400
µA
ICMP2
Block current, low power mode
–
–
50
µA
ICMP2
Block current, low power mode
For PSoC 4 BLE, PSoC
4100M/ PSoC 4200M
families
–
–
100
µA
ICMP2
Block current, low power mode
For PSoC 4200L family
–
50
100
µA
ICMP3
Block current, ultra low power mode
–
–
6
µA
ICMP3
Block current, ultra low power mode
–
6
28
µA
Document Number: 002-11086 Rev. **
For PSoC 4100M/
PSoC 4200M/
PSoC 4200L families
Page 19 of 22
PSoC® Creator™ Component Datasheet
PSoC 4 Low Power Comparator (LPComp)
Parameter
ZCMP
Description
Conditions
DC input impedance of comparator
Min
Typ
Max
Units
35
–
–
MΩ
Min
Typ
Max
Units
AC Specifications
Parameter
Description
Conditions
TRESP1
Response time, normal mode
50 mV overdrive
–
–
38
ns
TRESP1
Response time, normal mode
50 mV overdrive, for
PSoC 4100M/ PSoC
4200M families
–
–
110
ns
TRESP1
Response time, normal mode
50 mV overdrive, for
PSoC 4200L family
–
38
110
ns
TRESP2
Response time, low power mode
50 mV overdrive
–
–
70
ns
TRESP2
Response time, low power mode
50 mV overdrive, for
PSoC 4100M/ PSoC
4200M families
–
–
200
ns
TRESP2
Response time, low power mode
50 mV overdrive, for
PSoC 4200L family
–
70
200
ns
TRESP3
Response time, ultra low power mode
200 mV overdrive
–
–
2.3
µs
TRESP3
Response time, ultra low power mode
200 mV overdrive, for
PSoC 4100M/
PSoC 4200M families
–
–
15
µs
TRESP3
Response time, ultra low power mode
200 mV overdrive, for
PSoC 4200L family
2.3
15
µs
Page 20 of 22
Document Number: 002-11086 Rev. **
PSoC® Creator™ Component Datasheet
PSoC 4 Low Power Comparator (LPComp)
Component Changes
This section lists the major changes in the component from the previous version.
Version
2.20
2.10.a
Description of Changes
Reason for Changes / Impact
Fixed an issue with fake interrupt during start.
In cases when Vin_positive is greater than
Vin_negative for the first execution of
LPComp_Start() (that is, the comparator's output
becomes "high" immediately after start) and the
Interrupt mode is set to "rising edge" or "both,” a fake
interrupt might have caused interrupt system
malfunctioning (interrupts from LPComp will not
appear).
Added note about input signal correctness in
Low Power Mode.
Clarification.
Minor datasheet update.
Updated information to include PSoC 4200L devices.
Changed the description text for the characterization
section.
2.10
Added support for future devices.
Changes were made to allow for support of future
devices. There is no impact to the component at this
time other than version number change.
2.0.b
Datasheet edits.
Updated information to include PSoC 4100M and
PSoC 4200M devices.
Updated block diagram in the Functional Description
section.
Updated description of the Output Configuration.
Updated DC and AC Electrical Characteristics
section with PSoC 4100M/ PSoC 4200M data.
2.0.a
Datasheet edits.
Updated characterization data for BLE devices.
Clarified that the new APIs are not applicable to
PSoC 4100 / PSoC 4200 devices:
LPComp_SetInterruptMask(),
LPComp_GetInterruptMask(),
LPComp_GetInterruptSourceMasked()
2.0
Added new APIs:
Updates to support PSoC 4200 BLE devices.
LPComp_SetInterruptMask(),
LPComp_GetInterruptMask(),
LPComp_GetInterruptSourceMasked()
Added Output Configuration settings on
General Tab. For manual output control the
LPComp_SetOutputMode() API was added.
Updated Functional Description section.
Added Advanced Tab with Legacy output
position settings.
Document Number: 002-11086 Rev. **
This provides backwards compatibility with
PSoC 4100 / PSoC 4200 designs.
Page 21 of 22
PSoC 4 Low Power Comparator (LPComp)
Version
Description of Changes
Added note on customizer that in Hibernate
mode when Speed/Power selection is set to
“Slow/Ultra low” the "Rising edge" and "Falling
edge" selections are not available.
PSoC® Creator™ Component Datasheet
Reason for Changes / Impact
In Hibernate mode the comparator output will actually
get an interrupt for both edges even rising or falling
edge options are set. The issue only applies to PSoC
4100 / PSoC 4200 devices.
There is no problem if the comparator is not used in
Hibernate mode or if the Pulse/Interrupt configuration
is already set Both edges.
Speed/Power settings on the customizer and
description of the defines for SetSpeed() API
were renamed to “Slow/Ultra low”,
“Medium/Low” and “Fast/Normal” to match
device datasheet.
Filter option was removed from the component
General Tab. SetFilter() API preserved for
backward compatibility, but is not
recommended for use.
1.0.b
Updated description of the Interrupt output
1.0.a
Updated datasheet.
1.0
New Component
Removed the VOFFSET1 spec.
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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
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Page 22 of 22
Document Number: 002-11086 Rev. **