Specification of Memory Access, No.1017, AUTOSAR R21-11(103) CP

Specification of Memory Access, No.1013, 2021-11

https://www.autosar.org/fileadmin/standards/classic/21-11/AUTOSAR_SWS_MemoryAccess.pdf


AUTOSAR R21-11記事一覧はこちら。

AUTOSAR 21-11, 84文書読んだ。2022年6月中に半分到達予定。

https://qiita.com/kaizen_nagoya/items/9935c9e58bf82e1e63d2

AUTOSAR 21-11, 62文書読んだ。2022年5月中に半分到達予定。

https://qiita.com/kaizen_nagoya/items/648b32867635993410c8

AUTOSAR R21-11(0) 仕様ダウンロード一覧。単語帳。参考文献資料作成

https://qiita.com/kaizen_nagoya/items/9b3a1b9b8d1e8d7e288e

# 用語(terms)
|Terms| 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.



## 英日
日本語は仮訳

T.B.D.

# 参考(reference)
[1] Glossary, AUTOSAR_TR_Glossary
https://www.autosar.org/fileadmin/standards/foundation/21-11/AUTOSAR_TR_Glossary.pdf
[2] General Specification of Basic Software Modules
AUTOSAR_SWS_BSWGeneral
[3] Requirements on Memory Hardware Abstraction Layer
AUTOSAR_SRS_MemoryHWAbstractionLayer
[4] General Requirements on Basic Software Modules
AUTOSAR_SRS_BSWGeneral
[5] Requirements on AUTOSAR Features
AUTOSAR_RS_Features