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Overview
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--------
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The T4240QDS is a high-performance computing evaluation, development and test
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platform supporting the T4240 QorIQ™ Power Architecture™ processor. T4240QDS is
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optimized to support the high-bandwidth DDR3 memory ports, as well as the
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highly-configurable SerDes ports. The system is lead-free and RoHS-compliant.
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Board Features
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SERDES Connections
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32 lanes grouped into four 8-lane banks
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Two “front side” banks dedicated to Ethernet
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- High-speed crosspoint switch fabric on selected lanes
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- Two PCI Express slots with side-band connector supporting
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- SGMII
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- XAUI
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- HiGig
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- I-pass connectors allow board-to-board and loopback support
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Two “back side” banks dedicated to other protocols
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- High-speed crosspoint switch fabric on all lanes
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- Four PCI Express slots with side-band connector supporting
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- PCI Express 3.0
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- SATA 2.0
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- SRIO 2.0
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- Supports 4X Aurora debug with two connectors
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DDR Controllers
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Three independant 64-bit DDR3 controllers
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Supports rates of 1866 up to 2133 MHz data-rate
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Supports two DDR3/DDR3LP UDIMM/RDIMMs per controller
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DDR power supplies 1.5V to all devices with automatic tracking of VTT.
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Power software-switchable to 1.35V if software detects all DDR3LP devices.
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MT9JSF25672AZ-2G1KZESZF has been tested at 1333, 1600, 1867, 2000 and
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2133MT/s speeds. For 1867MT/s and above, read-to-write turnaround time
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increases by 1 clock.
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IFC/Local Bus
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NAND flash: 8-bit, async or sync, up to 2GB.
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NOR: 16-bit, Address/Data Multiplexed (ADM), up to 128 MB
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NOR: 8-bit or 16-bit, non-multiplexed, up to 512MB
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- NOR devices support 16 virtual banks
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GASIC: Minimal target within Qixis FPGA
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PromJET rapid memory download support
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Address demultiplexing handled within FPGA.
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- Flexible demux allows 8 or 16 bit evaluation.
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IFC Debug/Development card
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- Support for 32-bit devices
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Ethernet
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Support two on-board RGMII 10/100/1G ethernet ports.
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SGMII and XAUI support via SERDES block (see above).
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1588 support via Symmetricom board.
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QIXIS System Logic FPGA
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Manages system power and reset sequencing
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Manages DUT, board, clock, etc. configuration for dynamic shmoo
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Collects V-I-T data in background for code/power profiling.
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Supports legacy TMT test features (POSt, IRS, SYSCLK-synchronous assertion)
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General fault monitoring and logging
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Runs from ATX “hot” power rails allowing operation while system is off.
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Clocks
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System and DDR clock (SYSCLK, “DDRCLK”)
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- Switch selectable to one of 16 common settings in the interval 33MHz-166MHz.
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- Software selectable in 1MHz increments from 1-200MHz.
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SERDES clocks
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- Provides clocks to all SerDes blocks and slots
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- 100, 125 and 156.25 MHz
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Power Supplies
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Dedicated regulators for VDD
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- Adjustable from (0.7V to 1.3V at 80A
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- Regulators can be controlled by VID and/or software
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Dedicated regulator for GVDD_PL: 1.35/1.5V at 22A
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- VTT/MVREF automatically track operating voltage
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Dedicated regulators/filters for AVDD supplies
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Dedicated regulators for other supplies: OVDD, BVDD, DVDD, LVDD, POVDD, etc.
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USB
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Supports two USB 2.0 ports with integrated PHYs
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- One type A, one type micro-AB with 1.0A power per port.
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Other IO
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eSDHC/MMC
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- SDHC card slot
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eSPI port
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- High-speed serial flash
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Two Serial port
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Four I2C ports
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Memory map
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----------
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The addresses in brackets are physical addresses.
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0x0_0000_0000 (0x0_0000_0000) - 0x0_7fff_ffff 2GB DDR (more than 2GB is initialized but not mapped under with TLB)
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0x0_8000_0000 (0xc_0000_0000) - 0x0_dfff_ffff 1.5GB PCIE memory
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0x0_f000_0000 (0xf_0000_0000) - 0x0_f1ff_ffff 32MB DCSR (includes trace buffers)
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0x0_f400_0000 (0xf_f400_0000) - 0x0_f5ff_ffff 32MB BMan
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0x0_f600_0000 (0xf_f600_0000) - 0x0_f7ff_ffff 32MB QMan
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0x0_f800_0000 (0xf_f800_0000) - 0x0_f803_ffff 256KB PCIE IO
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0x0_e000_0000 (0xf_e000_0000) - 0x0_efff_ffff 256MB NOR flash
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0x0_fe00_0000 (0xf_fe00_0000) - 0x0_feff_ffff 16MB CCSR
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0x0_ffdf_0000 (0xf_ffdf_0000) - 0x0_ffdf_03ff 4KB QIXIS
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0x0_ffff_f000 (0x0_7fff_fff0) - 0x0_ffff_ffff 4KB Boot page translation for secondary cores
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The physical address of the last (boot page translation) varies with the actual DDR size.
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Voltage ID and VDD override
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--------------------
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T4240 has a VID feature. U-boot reads the VID efuses and adjust the voltage
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accordingly. The voltage can also be override by command vdd_override. The
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syntax is
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vdd_override <voltage in mV>, eg. 1050 is for 1.050v.
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Upon success, the actual voltage will be read back. The value is checked
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for safety and any invalid value will not adjust the voltage.
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Another way to override VDD is to use environmental variable, in case of using
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command is too late for some debugging. The syntax is
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setenv t4240qds_vdd_mv <voltage in mV>
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saveenv
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reset
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The override voltage takes effect when booting.
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Note: voltage adjustment needs to be done step by step. Changing voltage too
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rapidly may cause current surge. The voltage stepping is done by software.
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Users can set the final voltage directly.
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