TechnicalReference_MemIfs

MICROSAR MemIf
Technical Reference

Version 2.02.00

Authors
Tobias Schmid, Manfred Duschinger, Michael Goß
Status
Released

Technical Reference MICROSAR MemIf

1  Document Information
1.1
History
Author
Date
Version
Remarks
Tobias Schmid
2008-04-14
1.0
Creation of document
Manfred Duschinger
2013-02-20
1.01.00
Ch. 4.1. Update files
according to new generator
Ch. 6 Update Configuration
Michael Goß
2014-11-21
2.01.01
Typos were corrected and
content was modified a little
Michael Goß
2015-04-23
2.02.00
Content was updated
regarding SafeBSW MemIf
Table 1-1
History of the document
1.2
Reference Documents
No.
Title
Version
[1]
AUTOSAR_SWS_Mem_AbstractionInterface.pdf
V1.4.0
[2]
AUTOSAR_SWS_DET.pdf
V2.2.0
[3]
AUTOSAR_BasicSoftwareModules.pdf
V1.0.0
[4]
AUTOSAR_SWS_EEPROM_Abstraction.pdf
V2.0.0
[5]
AUTOSAR_SWS_Flash_EEPROM_Emulation.pdf
V2.0.0
Table 1-2
Reference documents

1.3
Scope of the Document
This technical reference describes the general use of module MemIf (AUTOSAR Memory
Abstraction Interface).

Please note
We have configured the programs in accordance with your specifications in the
  questionnaire. Whereas the programs do support other configurations than the one
specified in your questionnaire, Vector´s release of the programs delivered to your
company is expressly restricted to the configuration you have specified in the
questionnaire.
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Technical Reference MICROSAR MemIf

2  Introduction
This  document  describes  the  functionality, API  and  configuration  of  the AUTOSAR  BSW
module MemIf as specified in [1].

Supported AUTOSAR Release*:
4
Supported Configuration Variants:
PRE-COMPILE

Vendor ID:
MEMIF_VENDOR_ID
30 decimal
(=
Vector-Informatik,
according to HIS)
Module ID:
MEMIF_MODULE_ID
22 decimal
(according to ref. [3])
* For the precise AUTOSAR Release 4.x please see the release specific documentation.

MemIf (Memory Abstraction Interface) provides the interface that is used by the NvM to
access NV memory devices. Two different types of NV memory are intended for use: Flash
memory and EEPROM. To abstract the hardware dependencies of the memory devices,
low level drivers with a commonly defined API are used: Fls and Eep (internal or external).
These modules are abstracted by the modules Fee (Flash EEPROM Emulation) and Ea
(EEPROM Abstraction). Both modules may exist at the same time.
MemIf offers a common interface for accessing Fee or Ea instances. In order to distinguish
those different instances MemIf provides a set of device handles, which may be used for
configuration of NvM.
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2.1
Architecture Overview
The following figure shows where the MemIf is located in the AUTOSAR architecture.

Figure 2-1
AUTOSAR architecture

The next figure shows the interfaces to adjacent modules of the  MemIf. These interfaces
are described in chapter 5.
COM
DCM
NvM
IPDU
Det
MemIf
Fee
FR
Ea
CAN IF
FR IF
Fls
Eep

Figure 2-2
Interfaces to adjacent modules of the MemIf
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3  Functional Description
3.1
Features
The features listed in this chapter cover the complete functionality specified in [1].
The  "supported"  and  "not  supported"  features  are  presented  in  the  following  two  tables.
For further information of not supported features also see chapter 7.
The following features described in [1] are supported:
Feature
MemIf allows the NVRAM manager to access multiple instances of memory hardware
abstraction modules (Fee or Ea), regardless of different APIs and implementations.
Table 3-1
Supported SWS features
3.2
Initialization
MemIf does not need any initialization. Nevertheless it is necessary to initialize all memory
hardware abstraction module instances that are interfaced by MemIf.

Caution
MemIf does not provide any services for initialization of underlying memory hardware
  abstraction modules. Initialization of these modules is not done by MemIf!

3.3
Main Functions
MemIf  does  not  implement  main-functions  that  would  need  recurring  execution.  Job
requests are mapped to the appropriate underlying memory hardware abstraction module,
which implements the main-function for processing the job.

Caution
MemIf is not responsible for calling main-functions of the underlying hardware
  abstraction modules. Calling main-functions cyclically has to be implemented in the
BSW Scheduler (or something similar).

3.4
Error Handling
3.4.1
Development Error Reporting
Development  errors  are  reported  by  default  to  DET  using  the  service
Det_ReportError(),  (specified  in  [2]),  if  the  pre-compile  configuration  parameter  for
“Development Mode” and “Development Error Reporting” are enabled.
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The  reported  service  IDs  identify  the  services  which  are  described  in  5.3.  The  following
table presents the service IDs and the related services:
Service ID
Service
1
MemIf_SetMode
2
MemIf_Read
3
MemIf_Write
4
MemIf_Cancel
5
MemIf_GetStatus
6
MemIf_GetJobResult
7
MemIf_InvalidateBlock
8
MemIf_GetVersionInfo
9
MemIf_EraseImmediateBlock
Table 3-2
Mapping of service IDs to services
The errors reported to DET are described in the following table:
Error Code
Description
0x01
MEMIF_E_PARAM_DEVICE
The parameter denoting the device index passed to
the API service is out of range.
0x02
MEMIF_E_PARAM_POINTER  The parameter passed to MemIf_GetVersionInfo
references no valid address (NULL-Pointer).
Table 3-3
Errors reported to DET

3.4.1.1
Parameter Checking
The following table shows which parameter checks are performed on which services:

Check
o
ter
t
g a

e
n
c

i
s
i
ed
me
es
a
nc

v
ss ci r er dres

dek  pa erv  pak efe  add
Service
ex
I s
i

P
Chec
ndi A
Chec
for r
alv
MemIf_GetVersionInfo


MemIf_SetMode

MemIf_Read


MemIf_Write


MemIf_Cancel


MemIf_GetStatus


MemIf_GetJobResult


MemIf_InvalidateBlock


MemIf_EraseImmediateBlock


Table 3-4
Development Error Reporting: Assignment of checks to services
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AUTOSAR requires that API functions check the validity of their parameters. The checks in
Table 3-4 are internal parameter checks of the API functions.
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4  Integration
This chapter gives necessary information for the integration of the MICROSAR MemIf into
an application environment of an ECU.
4.1
Scope of Delivery
The delivery of the MemIf contains the files which are described in the chapters 4.1.1 and
4.1.2:
4.1.1
Static Files
File Name
Description
MemIf.h
API of module MemIf, only this file needs to be included by upper layer
software (e.g. NvM)
MemIf_Types.h
Defines all standard types, needed by upper layer modules as well as the
modules Fee and Ea.
This file needs to be included by all memory hardware abstraction
modules according to AUTOSAR.
MemIf.c
Implementation of the functionalities of the module MemIf
Table 4-1
Static files

4.1.2
Dynamic Files
The dynamic files are generated by the configuration tool.
File Name
Description
MemIf_Cfg.h
Configuration header file
MemIf_Cfg.c
Configuration source file
Table 4-2
Generated files

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Technical Reference MICROSAR MemIf

4.2
Include Structure
deployment File Structure
Fee.h
«configurable
0..*
MemIf_Cfg.h
include»
Det.h
«include»
«configurable
Ea.h
include»
0..*
«include»
MemIf.h
MemIf_Types.h
«include»
Std_Types.h
«include»
«include»
«include»
«include»
MemIf.c
MemIf_Cfg.c

Figure 4-1
Include structure
4.3
Compiler Abstraction and Memory Mapping
The  objects  (e.g.  variables,  functions,  constants)  are  declared  by  compiler  independent
definitions  –  the  compiler  abstraction  definitions.  Each  compiler  abstraction  definition  is
assigned to a memory section.
The  following  table  contains  the  memory  section  names  and  the  compiler  abstraction
definitions, which are defined for the MemIf, and illustrates their assignment among each
other.

Compiler Abstraction
DE
Definitions

CO
A

_
T
E
A

T

T
D
S
E
A
L_
Memory Mapping
N
D
P
RIV
P
Sections
IF_CO
IF_CO
IF_P
IF_A
M
M
M
M
ME
ME
ME
ME
MEMIF_START_SEC_CONST_8BIT



MEMIF_STOP_SEC_CONST_8BIT
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MEMIF_START_SEC_CONST_32BIT



MEMIF_STOP_SEC_CONST_32BIT
MEMIF_START_SEC_CODE




MEMIF_STOP _SEC_CODE
Memory sections in which underlying memory




hardware abstraction modules’ code resides
Memory sections of data buffers, which are passed


to the API services for read or write jobs
Memory sections of buffers passed to


MemIf_GetVersionInfo
Table 4-3
Compiler abstraction and memory mapping
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5  API Description
5.1
Interfaces Overview
class Logical View
Nv M
MemIf
+  MemIf_Cancel(uint8) : void
+  MemIf_EraseImmediateBlock(uint8, uint16) : Std_ReturnType
+  MemIf_GetJobResult(uint8) : MemIf_JobResultType
+  MemIf_GetStatus(uint8) : MemIf_StatusType
+  MemIf_GetVersionInfo(Std_VersionInfoType*) : void
Det
+  MemIf_InvalidateBlock(uint8, uint16) : Std_ReturnType
+  MemIf_Read(uint8, uint16, uint16, MemIf_DataPtr_pu8*, uint16) : Std_ReturnType
+  Det_ReportError(uint16, uint8, uint8, uint8) : void
+  MemIf_SetMode(MemIf_ModeType) : void
+  MemIf_Write(uint8, uint16, MemIf_DataPtr_pu8) : Std_ReturnType
0..*
0..*
Fee
Ea
+  Fee_Cancel() : void
+  Ea_Cancel() : void
+  Fee_EraseImmediateBlock(uint16) : Std_ReturnType
+  Ea_EraseImmediateBlock(uint16) : Std_ReturnType
+  Fee_GetJobResult() : MemIf_JobResultType
+  Ea_GetJobResult() : MemIf_JobResultType
+  Fee_GetStatus() : MemIf_StatusType
+  Ea_GetStatus() : MemIf_StatusType
+  Fee_GetVersionInfo(Std_VersionInfoType*) : void
+  Ea_GetVersionInfo(Std_VersionInfoType) : void
+  Fee_Init() : void
+  Ea_Init() : void
+  Fee_InvalidateBlock(uint16) : Std_ReturnType
+  Ea_InvalidateBlock(uint16) : Std_ReturnType
+  Fee_Read(uint16, uint16, uint8*, uint16) : Std_ReturnType
+  Ea_Read(uint16, uint16, uint8*, uint16) : Std_ReturnType
+  Fee_SetMode(MemIf_ModeType) : void
+  Ea_SetMode(MemIf_ModeType) : void
+  Fee_Write(uint16, uint8*) : Std_ReturnType
+  Ea_Write(uint16, uint8*) : Std_ReturnType

Figure 5-1
MemIf interactions with other BSW
5.2
Type Definitions
Type Name
C-Type  Description
Value Range
MemIf_StatusType
enum
Denotes the states of
MEMIF_UNINIT
BSW modules in the
Module is not initialized
memory stack
MEMIF_IDLE
There are no pending jobs that
need processing
MEMIF_BUSY
Module is processing jobs, no
further job requests are accepted
MEMIF_BUSY_INTERNAL
No job requests are being
processed, but the module is busy
executing internal operations
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Type Name
C-Type  Description
Value Range
MemIf_JobResultType  enum
Denotes the result of a
MEMIF_JOB_OK
job request after
Job processing finished
processing of this job
successfully
MEMIF_JOB_FAILED
Job processing finished with an
error
MEMIF_JOB_PENDING
Job is currently being processed
MEMIF_JOB_CANCELLED
Job has been cancelled by the
user
MEMIF_BLOCK_INCONSISTENT
Job finished successfully, but data
is inconsistent
MEMIF_BLOCK_INVALID
Job finished successfully but data
has been invalidated
MemIf_ModeType
enum
Denotes the processing
MEMIF_MODE_SLOW
mode for a module in the  Jobs are processed with the
memory stack
configured properties for slow
mode
MEMIF_MODE_FAST
Jobs are processed with the
configured properties for fast mode
Table 5-1
Type definitions
5.3
Services provided by MemIf
The MemIf API consists of services, which are realized by function calls.
5.3.1
MemIf_GetVersionInfo
Prototype
void MemIf_GetVersionInfo ( Std_VersionInfoType * VersionInfoPtr )
Parameter
VersionInfoPtr
Reference to a version information structure in RAM

Return code
-
-
Functional Description
This service writes the version information of MemIf to the referenced structure.
Particularities and Limitations
  In case the input parameter references an invalid address (NULL-pointer) the error
MEMIF_E_PARAM_POINTER is reported to Det and execution of the service is aborted.
  This service is only available if “Version Info Api” is configured to STD_ON
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Expected Caller Context
  This service has no restriction to the allowed or expected caller context.
Table 5-2
MemIf_GetVersionInfo
5.3.2
MemIf_SetMode
Prototype
void MemIf_SetMode(MemIf_ModeType Mode )
Parameter
Mode
Mode to switch modules into

Return code
-
-
Functional Description
This service switches all underlying memory hardware abstraction modules to the requested mode of
operation, by calling [Ea|Fee]_SetMode (See description of respective module’s function).
Particularities and Limitations
  All memory abstraction modules have to be in state MEMIF_IDLE when this service is
executed.
Call context
>  This service has no restriction to the allowed or expected caller context.
Table 5-3
MemIf_SetMode
5.3.3
MemIf_Read
Prototype
Std_ReturnType MemIf_Read
(

uint8
DeviceIndex,

uint16  BlockNumber,

uint16  BlockOffset,

uint8*  DataBufferPtr,

uint16  Length
)
Parameter
DeviceIndex
Index of the memory hardware abstraction module to which the read operation

shall be delegated.
BlockNumber
Identifies the block to read in non

-volatile memory.
BlockOffset
Offset in the block identified by BlockNumber from which on reading is

performed
DataBufferPtr
Reference to the data buffer to which the data in non

-volatile memory is read
to.
Length
Number of bytes to read

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Return code
E_OK
Read job request is accepted by the addressed memory hardware abstraction

module.
E_NOT_OK
Read job request is rejected by the addressed memory hardware abstraction

module.
Functional Description
Delegates the job request to the appropriate memory hardware abstraction module by calling the service
[Ea|Fee]_Read of the addressed module instance (See description of respective module’s function)
Particularities and Limitations
>  If the parameter DeviceIndex is out of range (greater than the number of configured
devices), the error code MEMIF_E_PARAM_DEVICE is reported to Det and execution of the
service is aborted.
Call context
>  NvM / Application
Table 5-4
MemIf_Read
5.3.4
MemIf_Write
Prototype
Std_ReturnType MemIf_Write
(

uint8
DeviceIndex,

uint16  BlockNumber,

uint8*  DataBufferPtr
)
Parameter
DeviceIndex
Index of the memory hardware abstraction module to which the write

operation shall be delegated.
BlockNumber
Identifies the block to write to non

-volatile memory.
DataBufferPtr
Reference to the data buffer whose content is written to non

-volatile memory
Return code
E_OK
Write job request is accepted by the addressed memory hardware abstraction

module.
E_NOT_OK
Write job request is rejected by the addressed memory hardware abstraction

module.
Functional Description
Delegates the job request to the appropriate memory hardware abstraction module by calling the service
[Ea|Fee]_Write of the addressed module instance (See description of respective module’s function)
Particularities and Limitations
>  If the parameter DeviceIndex is out of range (greater than the number of configured
devices), the error code MEMIF_E_PARAM_DEVICE is reported to Det and execution of the
service is aborted.
Call context
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>  NvM / Application
Table 5-5
MemIf_Write
5.3.5
MemIf_Cancel
Prototype
void MemIf_Cancel ( uint8 DeviceIndex )
Parameter
DeviceIndex
Index of the memory hardware abstraction module whose job processing shall

be cancelled.
Return code
-
-
Functional Description
Delegates the cancel request to the appropriate memory hardware abstraction module by calling the
service [Ea|Fee]_Cancel of the addressed module instance (See description of respective module’s
function)
Particularities and Limitations
>  If the parameter DeviceIndex is out of range (greater than the number of configured
devices), the error code MEMIF_E_PARAM_DEVICE is reported to Det and execution of the
service is aborted.
Call context
>  NvM / Application
Table 5-6
MemIf_Cancel
5.3.6
MemIf_GetStatus
Prototype
MemIf_StatusType MemIf_GetStatus ( uint8 DeviceIndex )
Parameter
DeviceIndex
Index of the memory hardware abstraction module whose job processing shall

be cancelled.
Return code
MEMIF_IDLE
Addressed module is ready to accept job requests

MEMIF_UNINIT
Addressed module is not initialized

MEMIF_BUSY
Addressed module is processing a job and is not able to accept new job

requests
MEMIF_BUSY_INTERNAL Addressed module is not processing any job requests, but the module is busy
  executing internal operations
Functional Description
Delegates the call to this service to the appropriate memory hardware abstraction module by calling the
service [Ea|Fee]_GetStatus (See description of respective module’s function).
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Particularities and Limitations
>  If the parameter DeviceIndex is out of range (greater than the number of configured
devices and unequal to MEMIF_BROADCAST_ID), the error code MEMIF_E_PARAM_DEVICE is
reported to Det and execution of the service is aborted.
>  In case the MEMIF_BROADCAST_ID is used as device index parameter, the overall status of all
underlying memory abstraction modules is returned. This overall status is computed as
follows:
>
MEMIF_IDLE – all underlying devices are in this state
>
MEMIF_UNINIT – at least one device returned this state
>
MEMIF_BUSY – at least one device returned this state and no other returned
MEMIF_UNINIT
>
MEMIF_BUSY_INTERNAL – at least one device returned this state and no other returned
MEMIF_BUSY or MEMIF_UNINIT
Call context
>  NvM / Application
Table 5-7
MemIf_GetStatus
5.3.7
MemIf_GetJobResult
Prototype
MemIf_JobResultType MemIf_GetJobResult ( uint8 DeviceIndex )
Parameter
DeviceIndex
Index of the memory hardware abstraction module whose job

processing shall be cancelled.
Return code
MEMIF_JOB_OK
Job processing finished successfully

MEMIF_JOB_FAILED
Job processing finished with an error

MEMIF_JOB_PENDING
Job is currently being processed

MEMIF_JOB_CANCELLED
Job has been cancelled by the user

MEMIF_BLOCK_INCONSISTENT
Job finished successfully, but data is inconsistent

MEMIF_BLOCK_INVALID
Job finished successfully but data has been invalidated

Functional Description
Delegates the call to this service to the appropriate memory hardware abstraction module by calling the
service [Ea|Fee]_GetJobResult (See description of respective module’s function).
Particularities and Limitations
>  If the parameter DeviceIndex is out of range (greater than the number of configured
devices), the error code MEMIF_E_PARAM_DEVICE is reported to Det and execution of the
service is aborted.
Call context
>  NvM / Application
Table 5-8
MemIf_GetJobResult
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5.3.8
MemIf_EraseImmediateBlock
Prototype
Std_ReturnType MemIf_EraseImmediateBlock
(

uint8
DeviceIndex,

uint16  BlockNumber
)
Parameter
DeviceIndex
Index of the memory hardware abstraction module to which the operation shall

be delegated.
BlockNumber
Identifies the block to erase in non

-volatile memory.
Return code
E_OK
Erase job request is accepted by the addressed memory hardware abstraction

module.
E_NOT_OK
Erase job request is rejected by the addressed memory hardware abstraction

module.
Functional Description
Delegates the job request to the appropriate memory hardware abstraction module by calling the service
[Ea|Fee]_EraseImmediateBlock of the addressed module instance (See description of respective module’s
function)
Particularities and Limitations
>  If the parameter DeviceIndex is out of range (greater than the number of configured
devices), the error code MEMIF_E_PARAM_DEVICE is reported to Det and execution of the
service is aborted.
Call context
>  NvM / Application
Table 5-9
MemIf_EraseImmediateBlock
5.3.9
MemIf_InvalidateBlock
Prototype
Std_ReturnType MemIf_InvalidateBlock
(

uint8
DeviceIndex,

uint16  BlockNumber
)
Parameter
DeviceIndex
Index of the memory hardware abstraction module to which the operation shall

be delegated.
BlockNumber
Identifies the block to invalidate in non

-volatile memory.
Return code
E_OK
Erase job request is accepted by the addressed memory hardware abstraction

module.
E_NOT_OK
Erase job request is rejected by the addressed memory hardware abstraction

module.
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Functional Description
Delegates the job request to the appropriate memory hardware abstraction module by calling the service
[Ea|Fee]_InvalidateBlock of the addressed module instance (See description of respective module’s
function)
Particularities and Limitations
>  If the parameter DeviceIndex is out of range (greater than the number of configured
devices), the error code MEMIF_E_PARAM_DEVICE is reported to Det and execution of the
service is aborted.
Call context
>  NvM / Application
Table 5-10
MemIf_InvalidateBlock
5.4
Services used by MemIf
In the following table services provided by other components, which are used by the MemIf
are  listed.  For details about  prototype and functionality refer to the documentation of  the
providing component.
Component
API
DET (see [2])
Det_ReportError
EA (see [4])
Ea_SetMode
Ea_Read
Ea_Write
Ea_Cancel
Ea_GetStatus
Ea_GetJobResult
Ea_InvalidateBlock
Ea_GetVersionInfo
Ea_EraseImmediateBlock
FEE (see [5])
Fee_SetMode
Fee_Read
Fee_Write
Fee_Cancel
Fee_GetStatus
Fee_GetJobResult
Fee_InvalidateBlock
Fee_GetVersionInfo
Fee_EraseImmediateBlock
Table 5-11
Services used by the MemIf
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6  Configuration
The  MEMIF  attributes  can  be  configured  using  the  DaVinci  Configurator.  The  outputs  of
the configuration and generation process are the configuration source files.
The description of each used parameter is set in the MemIf bswmd file.
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7  AUTOSAR Standard Compliance
7.1
Deviations
7.1.1
Extension of Error Codes
In contradiction to AUTOSAR standard MemIf019, no set of macros is implemented, which
maps  the  Memory  Abstraction  Interface  API  to  the  API  of  the  corresponding  memory
abstraction module.
7.2
Additions/ Extensions
No Extensions to AUTOSAR standard
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8  Glossary and Abbreviations
8.1
Glossary
Term
Description
DaVinci Configurator  Generation tool for MICROSAR components
Table 8-1
Glossary
8.2
Abbreviations
Abbreviation
Description
API
Application Programming Interface
AUTOSAR
Automotive Open System Architecture
BSW
Basis Software
DET
Development Error Tracer
ECU
Electronic Control Unit
MICROSAR
Microcontroller Open System Architecture (the Vector AUTOSAR
solution)
SRS
Software Requirement Specification
SWS
Software Specification
NVRAM
Non Volatile RAM Manager
NvM
NVRAM Manager
Fee
Flash EEPROM Emulation
Ea
EEPROM Abstraction
Fls
Flash Driver
Eep
EEPROM Driver
RAM
Random Access Memory
Table 8-2
Abbreviations
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9 Contact
Visit our website for more information on

> News
> Products
> Demo software
> Support
> Training data
> Addresses

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Last modified July 6, 2025: Initial commit (97b4320)