RELEASE
Revision B1
©Serious Integrated, Inc.
32
EEPROM
The SIM535 features an
Atmel ATSHA204
Cryptographic/Authentication device. Within this device is 4Kb (512 byte)
EEPROM for storing security keys and/or parameter data. If the cryptographic and authentication features of the
ATSHA204 are not used, the device can be used simply as a user EEPROM.
The 512 bit OTP area within the 4.5Kb EEPROM is pre-programmed by
Serious
and is unavailable for other uses.
Modifying or writing to this area will void your warranty with
Serious
and render the module unusable.
The ATSHA204 is an I2C device on the SIM’s main I2C control bus. This bus is shared by numerous devices: see the
I2C
Device Summary
for more information including I2C addresses. Consult the
Atmel ATSHA204 Data Sheet
for
programming and hardware information of the ATSHA204 device.
E-MMC FLASH MEMORY
The SIM535 module has, depending on the variant, 2GB or 4GB of embedded NAND FLASH with integrated MultiMedia
Card (MMC) controller. These
“e-MMC” devices
eliminate the need for wear-leveling and bad-block management
required by stand-alone NAND FLASH, and make bulk storage FLASH easy to manage as a linear or complex file system.
The e-MMC software architecture is an industry standard, with numerous suppliers conforming to the v4 and v5
specification.
The specific e-MMC FLASH device used on a given SIM is SIM-variant specific and may be one of several devices
including the Micron
MTFC2G (2GB), MTFC4G (4GB), and MTFC8G (8GB) series.
Micron and other vendors have announced transitions from e-MMC v4 to e-MMC v5. SIM535s may contain either
v4 or v5 devices depending on availability.
Software should be written to comprehend both versions.
Serious
makes every attempt to maintain 100% compatibility throughout the availibility lifetime of our devices.
However components – especially memory – are subject to ongoing and sometimes frequent process, density, and
availability changes. e-MMC sizes for each variant are a
minimum specification and vendors may vary
.
Software
must be written to comprehend sizes beyond this minimum specification and various vendors and
Serious
reserves
the right to substitute at any time larger devices than the specfied variant minimum.
SHIPEngine
(the runtime engine of the
Serious Human Interface™ Platform
) automatically configures and manages
the e-MMC, including accomodating different sizes and versions of the e-MMC.
For programming information, consult the
Micron e-MMC product website
.
SD CARD SOCKET
The SIM535 module has a full sized SD Card socket, suitable for use with FLASH cards and other low power type devices.
Writing software and implementing hardware for use with SD Cards may require a license from the
SD Association
.
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