SPRSP07F June   2017  – December 2019 66AK2G12

PRODUCTION DATA.  

  1. 1Device Overview
    1. 1.1 Features
    2. 1.2 Applications
    3. 1.3 Description
    4. 1.4 Functional Block Diagram
  2. 2Revision History
  3. 3Device Comparison
    1. 3.1 Related Products
  4. 4Terminal Configuration and Functions
    1. 4.1 Pin Diagram
    2. 4.2 Pin Attributes
    3. 4.3 Signal Descriptions
      1. 4.3.1  DSS
      2. 4.3.2  DDR EMIF
      3. 4.3.3  GPMC
      4. 4.3.4  Timers
      5. 4.3.5  I2C
      6. 4.3.6  UART
      7. 4.3.7  SPI
      8. 4.3.8  QSPI
      9. 4.3.9  McASP
      10. 4.3.10 USB
      11. 4.3.11 PCIESS
      12. 4.3.12 DCAN
      13. 4.3.13 EMAC
      14. 4.3.14 MLB
      15. 4.3.15 McBSP
      16. 4.3.16 MMC/SD
      17. 4.3.17 GPIO
      18. 4.3.18 ePWM
      19. 4.3.19 PRU-ICSS
      20. 4.3.20 Emulation and Debug Subsystem
      21. 4.3.21 System and Miscellaneous
        1. 4.3.21.1 Boot Mode Configuration
        2. 4.3.21.2 Reset
        3. 4.3.21.3 Oscillator Reference Clocks and Clock Generator
        4. 4.3.21.4 Miscellaneous
        5. 4.3.21.5 Interrupt Controllers (INTC)
        6. 4.3.21.6 Power Supplies
    4. 4.4 Pin Multiplexing
    5. 4.5 Connections for Unused Pins
  5. 5Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Power-On-Hour (POH) Limits
    4. 5.4 Recommended Operating Conditions
    5. 5.5 Operating Performance Points
    6. 5.6 Power Consumption Summary
    7. 5.7 Electrical Characteristics
      1. Table 5-2  DDR3L SSTL DC Electrical Characteristics
      2. Table 5-3  I2C OPEN DRAIN DC Electrical Characteristics
      3. Table 5-4  Oscillators DC Electrical Characteristics
      4. Table 5-5  LVDS Input Buffer DC Electrical Characteristics
      5. Table 5-6  LVDS Output Buffer DC Electrical Characteristics
      6. Table 5-7  MLB LVDS Buffers DC Electrical Characteristics
      7. Table 5-8  PORn DC Electrical Characteristics
      8. Table 5-9  1.8-Volt I/O LVCMOS DC Electrical Characteristics
      9. Table 5-10 3.3-Volt I/O LVCMOS DC Electrical Characteristics
      10. 5.7.1      USB0_PHY and USB1_PHY DC Electrical Characteristics
      11. 5.7.2      PCIe SERDES DC Electrical Characteristics
    8. 5.8 Thermal Resistance Characteristics for ABY Package
      1. Table 5-11 Thermal Resistance Characteristics for ABY Package
    9. 5.9 Timing and Switching Characteristics
      1. 5.9.1 Power Supply Sequencing
        1. 5.9.1.1 Power-Up Sequence
        2. 5.9.1.2 Power-Down Sequence
      2. 5.9.2 Reset Timing
        1. 5.9.2.1 Reset Electrical Data/Timing
      3. 5.9.3 Clock Specifications
        1. 5.9.3.1  Input Clocks / Oscillators
          1. 5.9.3.1.1 System Oscillator (SYSOSC) with External Crystal Circuit
          2. 5.9.3.1.2 System Oscillator (SYSOSC) with External LVCMOS Clock Source
          3. 5.9.3.1.3 System Oscillator (SYSOSC) Not Used
          4. 5.9.3.1.4 Optional LVDS Clock Inputs
        2. 5.9.3.2  Optional LVDS Clock Inputs Not Used
        3. 5.9.3.3  Optional Audio Oscillator (AUDOSC) with External Crystal Circuit
        4. 5.9.3.4  Optional Audio Oscillator (AUDOSC) with External LVCMOS Clock Source
        5. 5.9.3.5  Optional Audio Oscillator (AUDOSC) Not Used
        6. 5.9.3.6  Optional USB PHY Reference Clock
        7. 5.9.3.7  PCIe Reference Clock
        8. 5.9.3.8  Output Clocks
        9. 5.9.3.9  PLLs
          1. 5.9.3.9.1 DDR_PLL Settings
        10. 5.9.3.10 Recommended Clock and Control Signal Transition Behavior
      4. 5.9.4 Peripherals
        1. 5.9.4.1  DCAN
        2. 5.9.4.2  DSS
        3. 5.9.4.3  DDR EMIF
        4. 5.9.4.4  EMAC
          1. 5.9.4.4.1 EMAC MDIO Interface Timings
          2. 5.9.4.4.2 EMAC MII Timings
            1. Table 5-28 Timing Requirements for MII_RXCLK—MII Operation
            2. Table 5-29 Timing Requirements for MII_TXCLK—MII Operation
            3. Table 5-30 Timing Requirements for EMAC MII Receive 10 Mbps and 100 Mbps
            4. Table 5-31 Switching Characteristics Over Recommended Operating Conditions for EMAC MII Transmit 10 Mbps and 100 Mbps
          3. 5.9.4.4.3 EMAC RMII Timings
            1. Table 5-32 Timing Requirements for EMAC RMII_REFCLK—RMII Operation
            2. Table 5-33 Timing Requirements for EMAC RMII Receive
            3. Table 5-34 Switching Characteristics Over Recommended Operating Conditions for EMAC RMII_REFCLK —RMII Operation
            4. Table 5-35 Switching Characteristics Over Recommended Operating Conditions for EMAC RMII Transmit 10 Mbps and 100 Mbps
          4. 5.9.4.4.4 EMAC RGMII Timings
            1. Table 5-36 Timing Requirements for RGMII_RXC—RGMII Operation
            2. Table 5-37 Timing Requirements for EMAC RGMII Input Receive for 10 Mbps, 100 Mbps, and 1000 Mbps
            3. Table 5-38 Switching Characteristics Over Recommended Operating Conditions for Transmit - RGMII operation for 10 Mbps, 100 Mbps, and 1000 Mbps
            4. Table 5-39 Switching Characteristics Over Recommended Operating Conditions for EMAC RGMII Transmit - RGMII_TXD[3:0], and RGMII_TXCTL - RGMII Mode
            5. Table 5-40 Switching Characteristics Over Recommended Operating Conditions for EMAC RGMII Transmit - RGMII_TXD[3:0], and RGMII_TXCTL - RGMII ID Mode
        5. 5.9.4.5  GPMC
          1. 5.9.4.5.1 GPMC and NOR Flash—Synchronous Mode
            1. Table 5-41 GPMC and NOR Flash Timing Conditions—Synchronous Mode
            2. Table 5-42 GPMC and NOR Flash Timing Requirements—Synchronous Mode
            3. Table 5-43 GPMC and NOR Flash Switching Characteristics—Synchronous Mode
          2. 5.9.4.5.2 GPMC and NOR Flash—Asynchronous Mode
            1. Table 5-44 GPMC and NOR Flash Internal Timing Parameters—Asynchronous Mode
            2. Table 5-45 GPMC and NOR Flash Timing Requirements—Asynchronous Mode
            3. Table 5-46 GPMC and NOR Flash Switching Characteristics—Asynchronous Mode
        6. 5.9.4.6  I2C
          1. Table 5-47 Timing Requirements for I2C Input Timings
          2. Table 5-48 Switching Characteristics Over Recommended Operating Conditions for I2C Output Timings
        7. 5.9.4.7  McASP
          1. Table 5-49 Timing Requirements for McASP
        8. 5.9.4.8  McBSP
          1. Table 5-51 McBSP Timing Requirements
          2. Table 5-52 McBSP Switching Characteristics
          3. Table 5-53 McBSP Timing Requirements for FSR When GSYNC = 1
        9. 5.9.4.9  MLB
        10. 5.9.4.10 MMC/SD
          1. Table 5-60 MMC Timing Conditions
          2. Table 5-61 Timing Requirements for MMC0_CMD and MMC0_DATn
          3. Table 5-62 Timing Requirements for MMC1_CMD and MMC1_DATn when operating in SDR mode
          4. Table 5-63 Timing Requirements for MMC1_CMD and MMC1_DATn when operating in DDR mode
          5. Table 5-64 Switching Characteristics for MMCi_CLK
          6. Table 5-65 Switching Characteristics for MMC0_CMD and MMC0_DATn—HSPE=0
          7. Table 5-66 Switching Characteristics for MMC1_CMD and MMC1_DATn—HSPE=0 when operating in SDR mode
          8. Table 5-67 Switching Characteristics for MMC1_CMD and MMC1_DATn—HSPE=0 when operating in DDR mode
        11. 5.9.4.11 PCIESS
        12. 5.9.4.12 PRU-ICSS
          1. 5.9.4.12.1 Programmable Real-Time Unit (PRU-ICSS PRU)
            1. 5.9.4.12.1.1 PRU-ICSS PRU Direct Input/Output Mode Electrical Data and Timing
              1. Table 5-68 PRU-ICSS PRU Timing Requirements - Direct Input Mode
              2. Table 5-69 PRU-ICSS PRU Switching Requirements – Direct Output Mode
            2. 5.9.4.12.1.2 PRU-ICSS PRU Parallel Capture Mode Electrical Data and Timing
              1. Table 5-70 PRU-ICSS PRU Timing Requirements – Parallel Capture Mode
            3. 5.9.4.12.1.3 PRU-ICSS PRU Shift Mode Electrical Data and Timing
              1. Table 5-71 PRU-ICSS PRU Timing Requirements – Shift In Mode
              2. Table 5-72 PRU-ICSS PRU Switching Requirements – Shift Out Mode
          2. 5.9.4.12.2 PRU-ICSS EtherCAT (PRU-ICSS ECAT)
            1. 5.9.4.12.2.1 PRU-ICSS ECAT Electrical Data and Timing
              1. Table 5-73 PRU-ICSS ECAT Timing Requirements – Input Validated With SYNCx
              2. Table 5-74 PRU-ICSS ECAT Timing Requirements – LATCHx_IN
              3. Table 5-75 PRU-ICSS ECAT Switching Requirements – Digital IOs
          3. 5.9.4.12.3 PRU-ICSS MII_RT and Switch
            1. 5.9.4.12.3.1 PRU-ICSS MDIO Electrical Data and Timing
              1. Table 5-76 PRU-ICSS MDIO Timing Requirements – MDIO_DATA
              2. Table 5-77 PRU-ICSS MDIO Switching Characteristics – MDIO_CLK
              3. Table 5-78 PRU-ICSS MDIO Switching Characteristics – MDIO_DATA
            2. 5.9.4.12.3.2 PRU-ICSS MII_RT Electrical Data and Timing
              1. Table 5-79 PRU-ICSS MII_RT Timing Requirements – MII_RXCLK
              2. Table 5-80 PRU-ICSS MII_RT Timing Requirements – MII_TXCLK
              3. Table 5-81 PRU-ICSS MII_RT Timing Requirements – MII_RXD[3:0], MII_RXDV, and MII_RXER
              4. Table 5-82 PRU-ICSS MII_RT Switching Characteristics – MII_TXD[3:0] and MII_TXEN
          4. 5.9.4.12.4 PRU-ICSS Universal Asynchronous Receiver Transmitter (PRU-ICSS UART)
            1. Table 5-83 PRU-ICSS UART Timing Conditions
            2. Table 5-84 Timing Requirements for PRU-ICSS UART Receive
            3. Table 5-85 Switching Characteristics Over Recommended Operating Conditions for PRU-ICSS UART Transmit
          5. 5.9.4.12.5 PRU-ICSS PRU Sigma Delta and EnDAT Modes
            1. Table 5-86 PRU-ICSS PRU Timing Requirements - Sigma Delta Mode
            2. Table 5-87 PRU-ICSS PRU Timing Requirements - EnDAT Mode
            3. Table 5-88 PRU-ICSS PRU Switching Requirements - EnDAT Mode
        13. 5.9.4.13 QSPI
        14. 5.9.4.14 SPI
          1. 5.9.4.14.1 SPI—Slave Mode
            1. Table 5-91 Timing Requirements for SPI Input Timings—Slave Mode
            2. Table 5-92 Switching Characteristics for SPI Output Timings—Slave Mode
          2. 5.9.4.14.2 SPI—Master Mode
            1. Table 5-93 SPI Timing Conditions—Master Mode
            2. Table 5-94 Timing Requirements for SPI Input Timings—Master Mode
            3. Table 5-95 Switching Characteristics for SPI Output Timings—Master Mode
        15. 5.9.4.15 Timers
        16. 5.9.4.16 UART
          1. Table 5-98 Timing Requirements for UART
          2. Table 5-99 Switching Characteristics Over Recommended Operating Conditions for UART
        17. 5.9.4.17 USB
      5. 5.9.5 Emulation and Debug Subsystem
        1. 5.9.5.1 IEEE 1149.1 Standard-Test-Access Port (JTAG)
          1. 5.9.5.1.1 JTAG Electrical Data and Timing
            1. Table 5-100 Timing Requirements for IEEE 1149.1 JTAG
            2. Table 5-101 Switching Characteristics Over Recommended Operating Conditions for IEEE 1149.1 JTAG
  6. 6Detailed Description
    1. 6.1  Overview
    2. 6.2  Functional Block Diagram
    3. 6.3  Arm A15
    4. 6.4  C66x DSP Subsystem
    5. 6.5  C66x Cache Subsystem
    6. 6.6  PRU-ICSS
    7. 6.7  Memory Subsystem
      1. 6.7.1 MSMC
      2. 6.7.2 DDR EMIF
      3. 6.7.3 GPMC
    8. 6.8  Interprocessor Communication
      1. 6.8.1 MSGMGR
      2. 6.8.2 SEM
    9. 6.9  EDMA
    10. 6.10 Peripherals
      1. 6.10.1  DCAN
      2. 6.10.2  DSS
      3. 6.10.3  eCAP
      4. 6.10.4  ePWM
      5. 6.10.5  eQEP
      6. 6.10.6  GPIO
      7. 6.10.7  I2C
      8. 6.10.8  ASRC
      9. 6.10.9  McASP
      10. 6.10.10 McBSP
      11. 6.10.11 MLB
      12. 6.10.12 MMC/SD
      13. 6.10.13 NSS
      14. 6.10.14 PCIESS
      15. 6.10.15 QSPI
      16. 6.10.16 SPI
      17. 6.10.17 Timers
      18. 6.10.18 UART
      19. 6.10.19 USB
  7. 7Applications, Implementation, and Layout
    1. 7.1 DDR3L Board Design and Layout Guidelines
      1. 7.1.1 DDR3L General Board Layout Guidelines
      2. 7.1.2 DDR3L Board Design and Layout Guidelines
        1. 7.1.2.1  Board Designs
        2. 7.1.2.2  DDR3L Device Combinations
        3. 7.1.2.3  DDR3L Interface Schematic
          1. 7.1.2.3.1 32-Bit DDR3L Interface
          2. 7.1.2.3.2 16-Bit DDR3L Interface
        4. 7.1.2.4  Compatible JEDEC DDR3L Devices
        5. 7.1.2.5  PCB Stackup
        6. 7.1.2.6  Placement
        7. 7.1.2.7  DDR3L Keepout Region
        8. 7.1.2.8  Bulk Bypass Capacitors
        9. 7.1.2.9  High-Speed Bypass Capacitors
          1. 7.1.2.9.1 Return Current Bypass Capacitors
        10. 7.1.2.10 Net Classes
        11. 7.1.2.11 DDR3L Signal Termination
        12. 7.1.2.12 VREF_DDR Routing
        13. 7.1.2.13 VTT
        14. 7.1.2.14 CK and ADDR_CTRL Topologies and Routing Definition
          1. 7.1.2.14.1 Four DDR3L Devices
            1. 7.1.2.14.1.1 CK and ADDR_CTRL Topologies, Four DDR3L Devices
            2. 7.1.2.14.1.2 CK and ADDR_CTRL Routing, Four DDR3L Devices
          2. 7.1.2.14.2 One DDR3L Device
            1. 7.1.2.14.2.1 CK and ADDR_CTRL Topologies, One DDR3L Device
            2. 7.1.2.14.2.2 CK and ADDR/CTRL Routing, One DDR3L Device
        15. 7.1.2.15 Data Topologies and Routing Definition
          1. 7.1.2.15.1 DQS and DQ/DM Topologies, Any Number of Allowed DDR3L Devices
          2. 7.1.2.15.2 DQS and DQ/DM Routing, Any Number of Allowed DDR3L Devices
        16. 7.1.2.16 Routing Specification
          1. 7.1.2.16.1 CK and ADDR_CTRL Routing Specification
          2. 7.1.2.16.2 DQS and DQ Routing Specification
    2. 7.2 High Speed Differential Signal Routing Guidance
    3. 7.3 Power Distribution Network (PDN) Implementation Guidance
      1. 7.3.1 Decoupling/Filtering of Analog Power Supplies and Reference Inputs
        1. 7.3.1.1 PLL Power Supplies
        2. 7.3.1.2 DDR EMIF PHY DLL Power Supplies
        3. 7.3.1.3 DDR EMIF PHY Voltage Reference Input
        4. 7.3.1.4 Internal LDO Outputs
        5. 7.3.1.5 PCIe PHY Power Supply
        6. 7.3.1.6 USB PHY Power Supplies
    4. 7.4 Single-Ended Interfaces
      1. 7.4.1 General Routing Guidelines
    5. 7.5 Clock Routing Guidelines
      1. 7.5.1 Oscillator Routing
      2. 7.5.2 Oscillator Ground Connection
  8. 8Device and Documentation Support
    1. 8.1 Device Nomenclature
    2. 8.2 Tools and Software
    3. 8.3 Documentation Support
    4. 8.4 Support Resources
    5. 8.5 Trademarks
    6. 8.6 Glossary
  9. 9Mechanical, Packaging, and Orderable Information
    1. 9.1 Packaging Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • ABY|625
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7.1.2.16.2 DQS and DQ Routing Specification

Skew within the DQS and DQ/DM net classes directly reduces setup and hold margin and thus this skew must be controlled. The only way to practically match lengths on a PCB is to lengthen the shorter traces up to the length of the longest net in the net class and its associated clock. As with CK and ADDR_CTRL, a reasonable trace route length is to within a percentage of its Manhattan distance. DQLMn is defined as DQ Longest Manhattan distance n, where n is the byte number. For a 32-bit interface, there are four DQLMs, DQLM0-DQLM3. Likewise, for a 16-bit interface, there are two DQLMs, DQLM0-DQLM1.

Given the DQS and DQ/DM pin locations on the processor and the DDR3L memories, the maximum possible Manhattan distance can be determined given the placement. Figure 7-22 shows this distance for four loads. It is from this distance that the specifications on the lengths of the transmission lines for the data bus are determined. For DQS and DQ/DM routing, these specifications are contained in Table 7-12.

66AK2G12 dqlm_sprs614.gifFigure 7-22 Any Number of Allowed DDR3L Devices

Table 7-12 Data Routing Specification(2)(11)

NO. PARAMETER MIN TYP MAX UNIT
DRS31 DB0 length 340 ps
DRS32 DB1 length 340 ps
DRS33 DB2 length 340 ps
DRS34 DB3 length 340 ps
DRS35 DBn skew(3) 5 ps
DRS36 DQSn+ to DQSn- skew 1 ps
DRS37 DQSn to DBn skew(3)(4) 5(10) ps
DRS38 Vias per trace 2(1) vias
DRS39 Via count difference 0(10) vias
DRS310 Center-to-center DBn to other DDR3L trace spacing(6) 4 w(5)
DRS311 Center-to-center DBn to other DBn trace spacing(7) 3 w(5)
DRS312 DQSn center-to-center spacing(8)(9)
DRS313 DQSn center-to-center spacing to other net 4 w(5)
  1. Max value is based upon conservative signal integrity approach. This value could be extended only if detailed signal integrity analysis of rise time and fall time confirms desired operation.
  2. External termination disallowed. Data termination should use built-in ODT functionality.
  3. Length matching is only done within a byte. Length matching across bytes is neither required nor recommended.
  4. Each DQS pair is length matched to its associated byte.
  5. Center-to-center spacing is allowed to fall to minimum 2w for up to 1250 mils of routed length.
  6. Other DDR3L trace spacing means other DDR3L net classes not within the byte.
  7. This applies to spacing within the net classes of a byte.
  8. DQS pair spacing is set to ensure proper differential impedance.
  9. The most important thing to do is control the impedance so inadvertent impedance mismatches are not created. Generally speaking, center-to-center spacing should be either 2w or slightly larger than 2w to achieve a differential impedance equal to twice the singleended impedance, Zo.
  10. Via count difference may increase by 1 only if accurate 3D modeling of the signal flight times – including accurately modeled signal propagation through vias – has been applied to ensure DBn skew and DQSn to DBn skew maximums are not exceeded.
  11. It is not required to match lengths across all bytes. Length matching is only required within the data bits of a given byte.