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SM320C6748EGWTS3 Arkusz danych(PDF) 3 Page - Texas Instruments

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Numer części SM320C6748EGWTS3
Szczegółowy opis  SM320C6748-HIREL Fixed- and Floating-Point Digital Signal Processor
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Producent  TI1 [Texas Instruments]
Strona internetowa  http://www.ti.com
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SM320C6748-HIREL
www.ti.com
SPRS947 – JUNE 2016
Submit Documentation Feedback
Product Folder Links: SM320C6748-HIREL
Device Overview
Copyright © 2016, Texas Instruments Incorporated
1.2
Applications
Currency Inspection
Biometric Identification
Machine Vision (Low-End)
1.3
Description
The SM320C6748-HIREL fixed- and floating-point DSP is a low-power applications processor based on a
C674x DSP core. This DSP provides significantly lower power than other members of the
TMS320C6000™ platform of DSPs.
The device enables original-equipment manufacturers (OEMs) and original-design manufacturers (ODMs)
to quickly bring to market devices with robust operating systems, rich user interfaces, and high processor
performance through the maximum flexibility of a fully integrated, mixed processor solution.
The device DSP core uses a 2-level cache-based architecture. The level 1 program cache (L1P) is a
32-KB direct mapped cache, and the level 1 data cache (L1D) is a 32-KB 2-way, set-associative cache.
The level 2 program cache (L2P) consists of a 256-KB memory space that is shared between program
and data space. L2 memory can be configured as mapped memory, cache, or combinations of the two.
Although the DSP L2 is accessible by other hosts in the system, an additional 128KB of RAM shared
memory is available for use by other hosts without affecting DSP performance.
For security-enabled devices, TI’s Basic Secure Boot lets users protect proprietary intellectual property
and prevents external entities from modifying user-developed algorithms. By starting from a hardware-
based “root-of-trust”, the secure boot flow ensures a known good starting point for code execution. By
default, the JTAG port is locked down to prevent emulation and debug attacks; however, the JTAG port
can be enabled during the secure boot process during application development. The boot modules are
encrypted while sitting in external nonvolatile memory, such as flash or EEPROM, and are decrypted and
authenticated when loaded during secure boot. Encryption and decryption protects customers’ IP and lets
them securely set up the system and begin device operation with known, trusted code.
Basic Secure Boot uses either SHA-1 or SHA-256, and AES-128 for boot image validation. Basic Secure
Boot also uses AES-128 for boot image encryption. The secure boot flow employs a multilayer encryption
scheme which not only protects the boot process but offers the ability to securely upgrade boot and
application software code. A 128-bit device-specific cipher key, known only to the device and generated
using a NIST-800-22 certified random number generator, is used to protect customer encryption keys.
When an update is needed, the customer uses the encryption keys to create a new encrypted image.
Then the device can acquire the image through an external interface, such as Ethernet, and overwrite the
existing code. For more details on the supported security features or TI’s Basic Secure Boot, refer to the
TMS320C674x/OMAP-L1x Processor Security User’s Guide (SPRUGQ9).
The peripheral set includes: a 10/100 Mbps Ethernet media access controller (EMAC) with a management
data input/output (MDIO) module; one USB2.0 OTG interface; one USB1.1 OHCI interface; two I2C Bus
interfaces; one multichannel audio serial port (McASP) with 16 serializers and FIFO buffers; two
multichannel buffered serial ports (McBSPs) with FIFO buffers; two serial peripheral interfaces (SPIs) with
multiple chip selects; four 64-bit general-purpose timers each configurable (one configurable as a
watchdog); a configurable 16-bit host-port interface (HPI); up to 9 banks of general-purpose input/output
(GPIO) pins, with each bank containing 16 pins with programmable interrupt and event generation modes,
multiplexed with other peripherals; three UART interfaces (each with RTS and CTS); two enhanced high-
resolution pulse width modulator (eHRPWM) peripherals; three 32-bit enhanced capture (eCAP) module
peripherals which can be configured as 3 capture inputs or 3 APWM outputs; two external memory
interfaces: an asynchronous and SDRAM external memory interface (EMIFA) for slower memories or
peripherals; and a higher speed DDR2/Mobile DDR controller.
The EMAC provides an efficient interface between the device and a network. The EMAC supports both
10Base-T and 100Base-TX, or 10 Mbps and 100 Mbps in either half- or full-duplex mode. Additionally, an
MDIO interface is available for PHY configuration. The EMAC supports both MII and RMII interfaces.


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