CY8C21345_13 Datasheet, PDF(35/39 Page) Cypress Semiconductor

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CY8C21345_13 Datasheet, PDF (35/39 Pages) Cypress Semiconductor – PSoC® Programmable System-on-Chip

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CY8C21345

CY8C22345

CY8C22545

Appendix: Silicon Errata for the PSoCÂ® CY8C21x45, CY8C22x45 Product Family

This section describes the errata for the CY8C21x45, CY8C22x45 family of PSoC devices. Details include errata trigger conditions,

scope of impact, available workarounds, and silicon revision applicability.

Contact your local Cypress Sales Representative if you have questions.

Part Numbers Affected

Part Number

CY8C21345

CY8C21645

CY8C22045

CY8C22345

CY8C22545

CY8C22645

Device Characteristics

All Variants

CY8C21x45, CY8C22x45 Qualification Status

Product Status: In Production

Errata Summary

The following table defines the errata applicable for this PSoC family device.

Items

Part Number

1. Free Running Nonstop Reading All CY8C21x45, CY8C22x45

cause 7 LSB Pseudo Code Variation devices affected

in SAR10ADC

2. Internal Main Oscillator (IMO)

All CY8C21x45, CY8C22x45

Tolerance Deviation at Temperature devices affected

Extremes

Silicon Revision

All

Fix Status

Silicon fix not planned. Use

workaround.

All

Silicon fix not planned. Use

workaround.

1. Free Running Nonstop Reading cause 7 LSB Pseudo Code Variation in SAR10ADC

â Problem Definition

In free running mode, there can be a variation of up to 7 LSB in the digital output of SAR10 ADC.

â Parameters Affected

Code Variation. This is not a specified parameter.

It is defined as the number of unique output codes generated by the ADC for a given constant input voltage, in addition to the correct

code. For example, for an input voltage of 2.000 V, the expected code is 190hex and the ADC generates three codes: 191hex, 190hex,

and 192hex. The code variation is 2 LSB.

â Trigger Condition(S)

SAR10 ADC is configured in the free running mode.

â Scope of Impact

Inaccurate output is possible.

â Workaround

This issue can be averted by using one or both of the following workarounds. Consult a Cypress representative for additional

assistance.

â Use the averaging technique. That is, take multiple samples of the input, and use a digital averaging filter.

â Disable the free running mode before reading data out, and enable the free running mode after completing the read operation.

â Fix Status

No silicon fix is planned.

Document Number: 001-43084 Rev. *Q

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