PSoC 3 and PSoC 5LP series of devices has 2 or 4 comparators. If the number of input signals that needs to be monitored is more than the available number of comparators, then one of the solutions is to multiplex the comparator. The other available options are to use OPAMPs and SIOs as comparators. SIO comparator details can be obtained from AN60580. In AN60220, as an example 4 channel multiplexing is implemented using configurable Digital and analog hardware, consuming 0% CPU bandwidth in multiplexing. It also explains ways to scale the design to different number of channels and scanning rate.
The following table indicates the PSoC devices, PSoC Creator versions, compilers, and development kits that will work with this application note project:
|
Project |
Device
|
PSoC Creator
Version |
Development Kit
CY8CKIT-xxx |
Compiler
|
|||||||
|
Architecture
|
Silicon
Revision |
V2.1 SP1 or higher |
V2.1/2.0
|
001
DVK |
Keil
|
GCC
|
RVDS
|
MDK
|
|||
|
AN60220.zip |
Prod
|
YES
|
NO
|
YES
|
YES*
|
NO
|
YES
|
N/A
|
N/A
|
N/A
|
|
|
Prod
|
YES
|
NO
|
YES
|
YES*
|
NO
|
N/A
|
YES
|
YES
|
YES
|
||
| AN60220_Archive.zip |
ES2, ES3, Prod
|
NO
|
YES
|
YES
|
YES*
|
NO
|
YES
|
N/A
|
N/A
|
N/A
|
|
|
ES1, Prod
|
NO
|
YES
|
YES
|
YES*
|
NO
|
N/A
|
YES
|
YES
|
YES
|
||
*Refer to Migrating CY8CKIT-001 DVK project to CY8CKIT 030/ 050.
- Click on AN77835 - PSoC® 3 to PSoC 5LP Migration Guide to learn differences between PSoC 3 and PSoC 5LP.
- For PSoC 5 project and related document, please download file AN60220_Archive.zip.
Projects associated with this application note can be downloaded from the ‘Related Files’ section below. For your convenience, we have provided projects that are compatible with the two most recent versions of PSoC Creator:
- AN60220.zip is used with PSoC Creator 2.1 SP1
- AN60220_Archive.zip is used with PSoC Creator 2.1/2.0
The project’s default settings may not be compatible with your device or kit, and you may need to change your project settings. For more information, see: