Specification of Memory Access, AUTOSAR 1017, R23-11, CP,


AUTOSARが2023年版、R(Release)23-11を公開しました。
https://www.autosar.org/fileadmin/standards/R23-11/CP/AUTOSAR_CP_SWS_MemoryAccess.pdf

R22-11
https://www.autosar.org/fileadmin/standards/R22-11/CP/AUTOSAR_SWS_MemoryAccess.pdf

R21-11 initial Release
https://www.autosar.org/fileadmin/standards/R21-11/CP/AUTOSAR_SWS_MemoryAccess.pdf



文書は検索してダウンロードできます。
https://www.autosar.org/


<この項は書きかけです。順次追記します。>
This article is not completed. I will add some words in order.

# Release Overviews
AUTOSARには現在3つの分類があります。CAN OSEK/VDXのClassic Platformと, Ethernet/TCP/IP POSIXのAdaptive Platformと、両者の共通部分のFoundationです。


Classic Platform Release Overview, AUTOSAR 0,　R23-11, CP
https://qiita.com/kaizen_nagoya/items/9d22c8722cbc0f42b137

Foundation Release Overview, AUTOSAR 781, R23-11, FO
https://qiita.com/kaizen_nagoya/items/f249bdb8c313d8bff883

Adaptive Platform Release Overview, AUTOSAR 782, R23-11, AP
https://qiita.com/kaizen_nagoya/items/13a104606a34fe24fcf7

# Qiita 記事一覧
Autosar Foundation R23-11 一覧
https://qiita.com/kaizen_nagoya/items/c30674cb2dac2fcbbd04

AUTOSAR Adaptive Platform R23-11一覧
https://qiita.com/kaizen_nagoya/items/1dece8799a730367b0dc

Autosar Classic Platform R23-11 一覧
https://qiita.com/kaizen_nagoya/items/f770f6c2906e1dcbf180


# 文書変更(Document Change) 
>• Fixed inconsistencies
# 用語(terms)

|term|Description|
|:--|:--|
|BndM |Bulk Non-Volatile Data Manager
|ECC |Error Correction Code
|FOTA |Firmware Over The Air - remote firmware update using wireless communication
|HSM| Hardware Security Module - dedicated security MCU core
|OTA |Over The Air - general term for wireless communication between OEM backend and vehicle
|RWW |Read While Write - capability of a memory device to perform a read operation in one memory bank while at the same time a write/erase operation takes place in another bank
|SOTA| Software Over The Air - remote software update using wireless communication
|Address Area| Contiguous memory area in the logical address space Typically multiple physical memory sectors are combined to one logical address area.
|Bank |Group of sector batches. In case a memory technology is segmented in sectors, a bank is an instance of a sector batch group in which no read-while-write operation is permitted. In case of a flash memory device, this typically maps to an individual flash controller.
|Job Request| Memory access request by an upper layer module for an address area.
|Memory Device| Group of banks
|Page Burst |Aggregated access of memory pages for improved performance In case a memory device technology has a physical segmentation, some memory devices provide an optimized access method to read or write multiple pages at a time. Page burst denotes the aggregation of memory pages used for the access optimization.
|Read Page| Smallest readable unit of a memory device (in bytes) Some memory device technologies must be accessed considering a physical segmentation. Hence a byte-wise access is not possible for all memory device technologies. This term defines the minimum size that needs to be read in one access.
|Sector| Smallest erasable memory unit (in bytes) Some memory device technologies require an explicit physical erase operation before the memory can be written. A sector defines the minimum size of such an erase unit. Depending on the memory device, sectors can be either uniform- or variable-sized.
|Sector Batch| Aggregation of sectors with uniform size Logical aggregation of contiguous sectors with the same size.
|Sector Burst| Aggregation of sectors for improved erase performance In case a memory technology needs a physical erase operation, some devices provide an erase performance optimization by erasing an aggregation of sectors in one step.
|Sub Address| Area Contiguous memory area in the logical address space mapped to a sector batch of one memory device.
|Write Page| Smallest writeable unit of a memory device (in bytes) Some memory device technologies must be accessed considering a physical segmentation. Hence a byte-wise access is not possible for all memory device technologies. This term defines the minimum size that needs to be written in one access.

# References
[1] Glossary AUTOSAR_FO_TR_Glossary
https://www.autosar.org/fileadmin/standards/R23-11/FO/AUTOSAR_FO_TR_Glossary.pdf
[2] General Specification of Basic Software Modules AUTOSAR_CP_SWS_BSWGeneral
[3] Requirements on Memory Hardware Abstraction Layer AUTOSAR_CP_SRS_MemoryHWAbstractionLayer
[4] General Requirements on Basic Software Modules AUTOSAR_CP_SRS_BSWGeneral
[5] Requirements on AUTOSAR Features AUTOSAR_CP_RS_Features



## 補足資料（Additions）
祝休日・謹賀新年：2024年の目標
https://qiita.com/kaizen_nagoya/items/b659d922327a7dcdc898

2023 Countdown Calendar 主催・参加一覧
https://qiita.com/kaizen_nagoya/items/c4c2f08ac97f38d08543

CountDownCalendar月間　いいねをいただいた記事群　views　順
https://qiita.com/kaizen_nagoya/items/583c5cbc225dac23398a

Countdown Calendar 2023, 百記事目を書くにあたって。
https://qiita.com/kaizen_nagoya/items/45185a04cfd88b71256a

1年間をまとめた「振り返りページ」＠２０２３
https://qiita.com/kaizen_nagoya/items/bcd1ebd49d3a9e8c7a90

AUTOSAR 文書番号
https://qiita.com/kaizen_nagoya/items/8b894228a0b76c2265c7

AUTOSAR R23-11 記憶の記録
https://qiita.com/kaizen_nagoya/items/701bc800b5f137e51a36

AUTOSAR Countdown Calendar 2023
https://qiita.com/advent-calendar/2023/autosar

AUTOSAR Abstract Platformへの道 R22-11
https://qiita.com/kaizen_nagoya/items/8ac2826635a8c536c7ec

自動車　記事　１００
https://qiita.com/kaizen_nagoya/items/f7f0b9ab36569ad409c5

Basic principles, ボッシュ自動車handbook(英語)11版まとめ<2>
https://qiita.com/kaizen_nagoya/items/24a1ba5da3d09b2a95d1

JAXA/IPA クリティカルソフトウェアワークショップ WOCS言語関連発表(改定版)
https://qiita.com/kaizen_nagoya/items/4789832baf494cb74626

＜この記事は個人の過去の経験に基づく個人の感想です。現在所属する組織、業務とは関係がありません。＞
This article is an individual impression based on the individual's experience. It has nothing to do with the organization or business to which I currently belong.


# 文書履歴(document history)
ver. 0.01 初稿 　20240128
### 最後までおよみいただきありがとうございました。
いいね　💚、フォローをお願いします。
#### Thank you very much for reading to the last sentence.
Please press the like icon 💚　and follow me for your happy life.