RELEASE
Revision B1
©Serious Integrated, Inc.
31
the operational state by default. If desired, software can (by driving
PF2
low) reset the serial FLASH at will. The
PB14/SSL00#
slave select pin is also weakly pulled high, and until this port is appropriately programed the FLASH will not
output data (or, see below, the Serial FLASH is driven from an external source).
The FLASH also contains factory-programmed information including the
Serious
Serial Number
of the module which
encodes the version, variant, and LCD option of the specific hardware. There are no “hardware identification bits” – the
only way to determine what version/variant/LCD is to read this
Serious
Serial Number
and decode it.
The
Serious Human Interface™ Platform
PC-based tools, including the
SHIPTide
development tool and the SHIPCrane
programming tool, can read, display, and decode the
Serious
Serial Number
for you through the
USB2.0 High-Speed
Device Port
.
Using the
Serious
SHIPBridge protocol, you can fetch the
Serious
Serial Number
over-the-wire (SPI, UART, USB, etc.)
connecting your system ot the SIM.
The SIM535 is configured to
boot from this Serial FLASH
. The SH7269 automatically loads the first 8KB from the device
and executes it. This boot firmware typically continues to load more of the serial FLASH into RAM (a second stage boot
loader), which in turn bootstraps a file system driver for the e-MMC where the main operating program is stored.
The SPI bus and control signals for the
Serial FLASH
are available on the
16-pin Power/Communications Connector
60-Pin Board-to-Board Expansion Connector
, and
SHIP Programming Port
.
Therefore, holding the SIM in
RESET#
and accessing the
Serial FLASH
through the SPI bus it is possible to reprogram the
Serial FLASH directly without any prior software installed on the SIM. The
SHIP Programming Port
with the
SHIP
Programming Connector 200 (SPC200)
connector and
SHIP Programming Adapter 200 (SPA200)
are able to access the
Serial FLASH in this manner and can be used to re-install a boot loader.
Do not drive the SPI bus or Serial FLASH signals when the SIM is not in
RESET#
as this may damage the circuitry on the SIM
and/or attached equipment.
SDRAM
The SIM535, depending on the variant, includes a Micron 32MB SDRAM or equivalent with a 16-bit data bus
configuration. The SDRAM can operate at up to 133 MHz depending on the MCU core frequency. The MCU’s built-in
SDRAM controller can be configured to enable this memory in random access or burst modes.
SHIPEngine
(the runtime engine of the
Serious Human Interface™ Platform
) automatically configures and manages the
SDRAM
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. DRAM sizes and configuration 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 multiple/different/larger devices than the specfied variant minimum.
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