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TNETV6446AINZWT Datasheet(PDF) 131 Page - Texas Instruments

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No. de pieza TNETV6446AINZWT
Descripción Electrónicos  Digital Media System-on-Chip
PDF  227 Pages
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Fabricante Electrónico  TI1 [Texas Instruments]
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TNETV6446AINZWT Datasheet(HTML) 131 Page - Texas Instruments

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TMS320DM6446
www.ti.com
SPRS283H – DECEMBER 2005 – REVISED SEPTEMBER 2010
6.10 External Memory Interface (EMIF)
DM6446 supports several memory and external device interfaces, including:
•
Asynchronous EMIF (EMIFA) for interfacing to NOR Flash, SRAM, etc.
•
NAND Flash
•
ATA/CF
6.10.1 Asynchronous EMIF (EMIFA)
The DM6446 Asynchronous EMIF (EMIFA) provides an 8-bit or 16-bit data bus, an address bus width up
to 24-bits, and 4 dedicated chip selects, along with memory control signals. These signals are multiplexed
between three peripherals:
•
EMIFA and NAND interfaces
•
ATA/CF
•
Host Port Interface
6.10.1.1 NAND (NAND, SmartMedia, xD)
The EMIFA interface provides both the asynchronous EMIF and NAND interfaces. Four chip selects are
provided and each are individually configurable to provide either EMIFA or NAND support. The NAND
features supported are as follows.
•
NAND flash on up to 4 asynchronous chip selects.
•
8 and 16-bit data bus widths.
•
Programmable cycle timings.
•
Performs ECC calculation.
•
NAND Mode also supports SmartMedia/SSFDC (Solid State Floppy Disk Controller) and xD memory
cards
•
ARM ROM supports booting of the DM6446 ARM processor from NAND flash located at CS2
The memory map for EMIFA and NAND registers is shown in Table 6-33. For more details on the EMIFA
and NAND interfaces, see the TMS320DM644x DMSoC Peripherals Overview Reference Guide (literature
number SPRUE19) and the TMS320DM644x DMSoC Asynchronous External Memory Interface (EMIF)
Reference Guide (literature number SPRUE20).
Copyright © 2005–2010, Texas Instruments Incorporated
Peripheral and Electrical Specifications
131
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Product Folder Link(s): TMS320DM6446



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