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

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。

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

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

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