4.1 Revision History

Doc. Rev.	Date	Comments
C	04/2024	Document: Editorial updates Added new data sheet clarifications: SPI: SPI Clock Electrical Characteristics: Power Consumption. The Power Consumption in Power-Down (Max 25°C) reduced from 2 µA to 0.6 µA. SPI - Timing Characteristics Programming Time
B	08/2023	Document: Editorial updates Silicon Errata Issues added: Device: Write Operation Lost if Consecutive Writes to Specific Address Spaces NVMCTRL: Wrong Reset Value of NVMCTRL.CTRLA Register Silicon Errata Issues updated: Device: Writing the OSCLOCK Fuse in FUSE.OSCCFG to ‘1’ Prevents Automatic Loading of Calibration Values RTC: Any Write to the RTC.CTRLA Register Resets the RTC and PIT Prescaler Counter Added new data sheet clarification: Electrical Characteristics: I/O Pin Characteristics
A	04/2021	Initial document release The content of the document has been restructured from: ATtiny202/402 Silicon Errata and Data Sheet Clarification ATtiny204/404 Silicon Errata and Data Sheet Clarification ATtiny406 Silicon Errata and Data Sheet Clarification to: ATtiny202/204/402/404/406 Silicon Errata and Datasheet Clarification document (this document) Refer to Appendix - Obsolete Revision History for further details. The following items are referring to changes between the latest revisions of the obsolete documents and this document: Removed Errata: USART: Start-of-Frame Detection Can Unintentionally Be Triggered in 'Active Mode' Removed old data sheet clarifications, as the corresponding data sheet has been updated with correct information

C

04/2024

Document:
- Editorial updates

Added new data sheet clarifications:
- SPI:
  - SPI Clock
- Electrical Characteristics:
  - Power Consumption. The Power Consumption in Power-Down (Max 25°C) reduced from 2 µA to 0.6 µA.
  - SPI - Timing Characteristics
  - Programming Time

B

08/2023

Document:
- Editorial updates

Silicon Errata Issues added:
- Device: Write Operation Lost if Consecutive Writes to Specific Address Spaces
- NVMCTRL: Wrong Reset Value of NVMCTRL.CTRLA Register
Silicon Errata Issues updated:
- Device: Writing the OSCLOCK Fuse in FUSE.OSCCFG to ‘1’ Prevents Automatic Loading of Calibration Values
- RTC: Any Write to the RTC.CTRLA Register Resets the RTC and PIT Prescaler Counter
Added new data sheet clarification:
- Electrical Characteristics: I/O Pin Characteristics

A

04/2021

Initial document release

The content of the document has been restructured from:

ATtiny202/402 Silicon Errata and Data Sheet Clarification
ATtiny204/404 Silicon Errata and Data Sheet Clarification
ATtiny406 Silicon Errata and Data Sheet Clarification

to:

ATtiny202/204/402/404/406 Silicon Errata and Datasheet Clarification document (this document)

Refer to Appendix - Obsolete Revision History for further details.

The following items are referring to changes between the latest revisions of the obsolete documents and this document:

Removed Errata:
- USART:
  - Start-of-Frame Detection Can Unintentionally Be Triggered in 'Active Mode'
Removed old data sheet clarifications, as the corresponding data sheet has been updated with correct information