Motorola TMS320C6711D warranty CPU DSP core description

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SPRS292A − OCTOBER 2005 − REVISED NOVEMBER 2005

CPU (DSP core) description

The CPU fetches advanced very-long instruction words (VLIW) (256 bits wide) to supply up to eight 32-bit instructions to the eight functional units during every clock cycle. The VLIW architecture features controls by which all eight units do not have to be supplied with instructions if they are not ready to execute. The first bit of every 32-bit instruction determines if the next instruction belongs to the same execute packet as the previous instruction, or whether it should be executed in the following clock as a part of the next execute packet. Fetch packets are always 256 bits wide; however, the execute packets can vary in size. The variable-length execute packets are a key memory-saving feature, distinguishing the C67x CPU from other VLIW architectures.

The CPU features two sets of functional units. Each set contains four units and a register file. One set contains functional units .L1, .S1, .M1, and .D1; the other set contains units .D2, .M2, .S2, and .L2. The two register files each contain 16 32-bit registers for a total of 32 general-purpose registers. The two sets of functional units, along with two register files, compose sides A and B of the CPU (see the functional block and CPU diagram and Figure 1). The four functional units on each side of the CPU can freely share the 16 registers belonging to that side. Additionally, each side features a single data bus connected to all the registers on the other side, by which the two sets of functional units can access data from the register files on the opposite side. While register access by functional units on the same side of the CPU as the register file can service all the units in a single clock cycle, register access using the register file across the CPU supports one read and one write per cycle.

The C67x CPU executes all C62x instructions. In addition to C62x fixed-point instructions, the six out of eight functional units (.L1, .S1, .M1, .M2, .S2, and .L2) also execute floating-point instructions. The remaining two functional units (.D1 and .D2) also execute the new LDDW instruction which loads 64 bits per CPU side for a total of 128 bits per cycle.

Another key feature of the C67x CPU is the load/store architecture, where all instructions operate on registers (as opposed to data in memory). Two sets of data-addressing units (.D1 and .D2) are responsible for all data transfers between the register files and the memory. The data address driven by the .D units allows data addresses generated from one register file to be used to load or store data to or from the other register file. The C67x CPU supports a variety of indirect addressing modes using either linear- or circular-addressing modes with 5- or 15-bit offsets. All instructions are conditional, and most can access any one of the 32 registers. Some registers, however, are singled out to support specific addressing or to hold the condition for conditional instructions (if the condition is not automatically “true”). The two .M functional units are dedicated for multiplies. The two .S and .L functional units perform a general set of arithmetic, logical, and branch functions with results available every clock cycle.

The processing flow begins when a 256-bit-wide instruction fetch packet is fetched from a program memory. The 32-bit instructions destined for the individual functional units are “linked” together by “1” bits in the least significant bit (LSB) position of the instructions. The instructions that are “chained” together for simultaneous execution (up to eight in total) compose an execute packet. A “0” in the LSB of an instruction breaks the chain, effectively placing the instructions that follow it in the next execute packet. If an execute packet crosses the fetch-packet boundary (256 bits wide), the assembler places it in the next fetch packet, while the remainder of the current fetch packet is padded with NOP instructions. The number of execute packets within a fetch packet can vary from one to eight. Execute packets are dispatched to their respective functional units at the rate of one per clock cycle and the next 256-bit fetch packet is not fetched until all the execute packets from the current fetch packet have been dispatched. After decoding, the instructions simultaneously drive all active functional units for a maximum execution rate of eight instructions every clock cycle. While most results are stored in 32-bit registers, they can be subsequently moved to memory as bytes or half-words as well. All load and store instructions are byte-, half-word, or word-addressable.

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Contents SPRS292A − October 2005 − Revised November Table of Contents Revision History Pages ADDITIONS/CHANGES/DELETIONSMultichannel Buffered Serial Port Timing GDP and ZDP BGA packages bottom view GDP and ZDP 272-PIN Ball Grid Array BGA PACKAGES†Bottom View Description Characteristics of the C6711D Processor Device characteristicsHardware Features Internal Clock C6711DDevice compatibility Digital Signal Processor Functional block and CPU DSP core diagramCPU DSP core description DA1 ST1DA2 ST2Memory map summary TMS320C6711D Memory Map SummaryMemory Block Description Block Size Bytes HEX Address Range Emif Registers Peripheral register descriptionsL2 Cache Registers HEX Address Range Acronym Register NameDevice Registers Interrupt Selector RegistersEdma Parameter RAM† HEX Address Range Acronym Register Name CommentsQuick DMA Qdma and Pseudo Registers† Edma RegistersPLL Controller Registers Gpio RegistersHPI Registers HEX Address Range Acronym Register Name Comments Timer Timer 0 and Timer 1 RegistersMcBSP0 and McBSP1 Registers McBSP0 McBSP1Signal groups description CE2 CE3CE1 CE0GP7EXTINT7 GP6EXTINT6 GP5EXTINT5 GP4EXTINT4 GpioCLKOUT2/GP2 General-Purpose Input/Output Gpio PortDevice configurations at device reset Device ConfigurationsConfiguration GDP/ZDP Functional Description PIN BOOTMODE‡CLKMODE0 Devcfg register description EksrcBIT # Name Description Terminal Functions PIN Signal Terminal FunctionsIPD Description Name GDP IPU‡ ZDP IPD Description Name GDP IPU‡ ZDP Jtag Emulation Resets and InterruptsUsed for transfer of data, address, and control IPD Description Name GDP IPU‡ ZDP HOST-PORT Interface HPILittle Endian HD12Only one asserted during any external data access Decoded from the two lowest bits of the internal addressEmif − ASYNCHRONOUS/SYNCHRONOUS Memory Control ¶ EA9 EA8 EA7 EA6 EA5 EA4 EA3 EA2 IPD Description Name GDP IPU‡ ZDP Emif − Address ¶Multichannel Buffered Serial Port 1 McBSP1 IPD Description Name GDP IPU‡ ZDP Emif − Data ¶GENERAL-PURPOSE INPUT/OUTPUT Gpio Module Multichannel Buffered Serial Port 0 McBSP0RSV RSV IPURSV IPD Dvdd Name GDP ZDP Supply Voltage PinsCvdd Supply voltage See NoteGround Pins Description Name GDP ZDP Supply Voltage PinsVSS GNDVSS PIN Signal TYPE† Description Name GDP ZDP Ground PinsVSS GND Description Name GDP ZDP Ground PinsDevelopment support Software Development ToolsHardware Development Tools Device support Device and development-support tool nomenclatureFully qualified production device Prefix Device Family Temperature Range Default 0 C to 90 CDevice Speed Range TechnologyDocumentation support Revision ID CPU CSR register descriptionPwrd PCC DCC Pgie GIECPU CSR Register Bit Field Description CPU IDPCC Cache configuration Ccfg register description Ccfg Register Bit Field DescriptionL2MODE Interrupt sources and interrupt selector DSP Interrupt Default Selector Module ControlDSP Interrupts Interrupt Selector EventEdma module and Edma selector Edma ChannelsEdma Selector ESEL3 Register 0x01A0 FF0C ESEL1 Register 0x01A0 FF04PLL and PLL controller Clkout Signals, Default Settings, and Control PLL Lock and Reset TimesEnabled or Disabled MIN TYP MAX UnitClock Signal PLL Clock Frequency Ranges†‡GDPA−167, ZDPA-167 PLL Control/Status Register Pllcsr Pllcsr Register 0x01B7 C100PLL Multiplier Control Register Pllm Pllm Register 0x01B7 C110DxEN OSCDIV1 Register 0x01B7 C124 Oscillator Divider 1 Register OSCDIV1OD1EN General-purpose input/output Gpio GP7 GP6 GP5 GP4 GP2DIR Power-down mode logic PD3 PD2 PD1 Pwrd Field of the CSR RegisterCharacteristics of the Power-Down Modes Power-supply sequencingSystem-level design considerations ModePower-supply design considerations Power-supply decouplingDvdd DSP Cvdd VSS GNDIeee 1149.1 Jtag compatibility statement Example Boards and Maximum Emif Speed Emif device speedEmif big endian mode correctness Emif Data Lines Pins Where Data PresentED3124 BE3 ED2316 BE2 ED158 BE1 ED70 BE0 Reset BootmodeRecommended operating conditions‡ MIN NOM MAX UnitIOH IOZ Parameter Test Conditions MIN TYP MAX UnitParameter Measurement Information Signal transition levelsTester Pin Electronics Output Under Test= 0.3 tcmax† VIL max VUS max Ground AC transient rise/fall time specificationsTiming parameters and board routing analysis Control Signals † Output from DSP Board-Level Timings Example see FigureOutput from DSP Input and Output Clocks PLL Mode Bypass Mode UnitTiming requirements for Clkin †‡§ See FigureGDPA-167 ParameterClkin CLKOUT3 GDPA-167 ZDPA−167 Timing requirements for ECLKIN† see Figure−200 −250Timing requirements for asynchronous memory cycles†‡§ Asynchronous Memory TimingSee −Figure AreCEx BE30 EA212 Address ED310 Read Data Setup = Strobe = Not ReadyAOE/SDRAS/SSOE † AWE/SDWE/SSWE † ArdySetup = Strobe = Not Ready Hold = CEx BE30 EA212AOE/SDRAS/SSOE † ARE/SDCAS/SSADS † AWE/SDWE/SSWE † Ardy Timing requirements for synchronous-burst Sram cycles† SYNCHRONOUS-BURST Memory TimingBE1 BE2 BE3 BE4 CEx BE30EA212 ED310 ARE/SDCAS/SSADS† AOE/SDRAS/SSOE† AWE/SDWE/SSWE†Timing requirements for synchronous Dram cycles† see Figure Synchronous Dram TimingRead Eclkout EA2113 Bank EA112 Column EA12 ED310AOE/SDRAS/SSOE † ARE/SDCAS/SSADS† AWE/SDWE/SSWE† EA2113 Write EclkoutEA12 ED310 AOE/SDRAS/SSOE † ARE/SDCAS/SSADS † AWE/SDWE/SSWE †CEx BE30 EA2113 Bank Activate EA112 Row Address EA12 ED310 Actv EclkoutAOE/SDRAS/SSOE† ARE/SDCAS/SSADS† AWE/SDWE/SSWE† Dcab EclkoutCEx BE30 EA2113 Bank EA112 EA12 ED310 Deac EclkoutRefr Eclkout CEx BE30 EA212 EA12 ED310CEx BE30 EA212 MRS value ED310 MRS EclkoutHOLD/HOLDA Timing Timing requirements for See Figure HOLD/HOLDA cycles†Hold Holda Eclkout Busreq Busreq TimingReset Timing Timing requirements for reset†‡ see FigureCLKMODE0 = Phase Clkin Eclkin ResetEmif Z Group† Emif Low Group† Group 2† Boot and Device External Interrupt Timing Timing requirements for external interrupts† see FigureEXTINT, NMI GDPA−167 HOST-PORT Interface TimingHstrobe Hstrobe HrdyHCS Hrdy HR/W Hhwil Hstrobe † HCS HasHas † HR/W Hhwil Hstrobe ‡ HCSHD150 input 1st halfword 2nd halfword HrdyHD150 input 1st half-word 2nd half-word −1 ¶ Multichannel Buffered Serial Port Timing FSR int Clks ClkrBitn-1 ClkxClks Timing requirements for FSR when Gsync = 1 see FigureFSR external CLKR/X no need to resync CLKR/X needs resync Master Slave MIN MAXMASTER§ Slave MIN Clkx FSXBit Bitn-1 MASTER§ Slave MIN MAX GDPA-167 McBSP Timing as SPI Master or Slave Clkstp = 10b, Clkxp = McBSP Timing as SPI Master or Slave Clkstp = 11b, Clkxp = Timer Timing Timing requirements for timer inputs†TINPx TOUTx GENERAL-PURPOSE INPUT/OUTPUT Gpio Port Timing Timing requirements for Gpio inputs†‡GPIx GPOx Jtag TEST-PORT Timing DTCKL-TDOV Delay time, TCK low to TDO validTiming requirements for Jtag test port see Figure TCK TDO TDI/TMS/TRSTThermal resistance characteristics S-PBGA package for GDP Package thermal resistance characteristicsThermal resistance characteristics S-PBGA package for ZDP Mechanical DataPackaging Information Orderable Device Status Package Pins Package Eco PlanMSL Peak Temp QtySeating Plane 4204396/A 04/02 GDP S-PBGA-N272Seating Plane 4204398/A 04/02 ZDP S-PBGA-N272Important Notice
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