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Product Change Notification - SYST-27YEGS241   (Convert To PDF)

29 Mar 2019
Product Category:
8-bit Microcontrollers
Affected CPNs:
Notification subject:
Data Sheet - megaAVR 0-series Family Data Sheet
Notification text:
Microchip has released a new DeviceDoc for the megaAVR 0-series Family Data Sheet of devices. If you are using one of these devices please read the document located at megaAVR 0-series Family Data Sheet.
Notification Status: Final

Description of Change:
1) Entire document: Added support for ATmega808/809/1608/1609, Added support for 40-pin PDIP, Editorial updates and Renamed document type from manual to family data sheet on the
2) Features: Updated data retention information and Extended speed grade information on the Features section
3) Memories: Added oscillator calibration (OSCCALnnxn) registers; SIGROW- Updated description to clarify that information is stored in fuse bytes, not in volatile registers; FUSE - Clarifying that reserved bits within a fuse byte must be written to ‘0’, Removed non-recommended BOD levels in BODCFG, Updating access for LOCKBIT from R/W to R, Removed misleading reset values; Updated Memory Section Access from CPU and UPDI on Locked Device section
4) AVR CPU: Removed redundant information
5) Clock Controller (CLKCTRL): Added OSC20MCALIBA register
6) Event System (EVSYS): STROBE/STROBEA renamed to STROBEx; Event Generators - Added Window Compare Match for ADC,  Updated TCB event generator description; Event Users- Updated table; STROBEn – Updated access from R/W to W; Updated generator names in CHANNEL ; Updated table in USER
7) PORTMUX - Port Multiplexer - Added explicit information for EVSYSROUTEA register
8) BOD - Brown-out Detector - Removed non-recommended BOD levels from CTRLB
9) TCA - 16-bit Timer/Counter Type A: Single Slope PWM Generation – Revised figure and description; Dual Slope PWM – Revised figure and description; Events – Revised description and added table
10) TCB - 16-bit Timer/Counter Type B : Updated block diagram for clock sources; Mode figures legend use improved; Input Capture Pulse-Width Measurement mode figure corrected; 8-bit PWM mode pseudo-code replaced by figure; Added output configuration table
11) Real-Time Counter (RTC): Clarified that first PIT interrupt and RTC count tick will be unknown; Added Debug Operation section; Updated reset values for PER and CMP register; Updated access for PITINTFLAGS register
12) USART - Universal Synchronous and Asynchronous Receiver and Transmitter:  Structural changes; General content improvements
13) Serial Peripheral Interface (SPI):  Added INTCTRL register
14) Two-Wire Interface (TWI): Removed misleading internal information from Overview section; Cleaned up Dual Control information; Clarified APIEN description in SCTRLA
15) CCL – Configurable Custom Logic: Register summary updated- Number n of LUTs and according registers (LUTnCTRLA, LUTnCTRLB, LUTnCTRLC, TRUTHn); Update of terms and descriptions: – Block Diagram section – CCL Input Selection MUX section – Sequencer Logic – Events – Filter – Association LUT-Sequencer
16) Analog-to-Digital Converter (ADC): Updated ADC Timing Diagrams – Single Conversion – Free-Running Conversion; Added information in the Events section
17) Unified Program and Debug Interface (UPDI): General content improvements; Updated Access for UROWWRITE in ASI_KEY_STATUS register

Impacts to Data Sheet: None

Reason for Change: To Improve Manufacturability

Change Implementation Status: Complete

Date Document Changes Effective: 29 Mar 2019

NOTE: Please be advised that this is a change to the document only the product has not been changed.

Markings to Distinguish Revised from Unrevised Devices: N/A

Please contact your local Microchip sales office with questions or concerns regarding this notification.

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