SPRS957I March   2016  – November 2019 AM5716 , AM5718

PRODUCTION DATA.  

  1. 1 Device Overview
    1. 1.1 Features
    2. 1.2 Applications
    3. 1.3 Description
    4. 1.4 Functional Block Diagram
  2. 2 Revision History
  3. 3 Device Comparison
    1. 3.1 Related Products
  4. 4 Terminal Configuration and Functions
    1. 4.1 Terminal Assignment
      1. 4.1.1 Unused Balls Connection Requirements
    2. 4.2 Ball Characteristics
    3. 4.3 Multiplexing Characteristics
    4. 4.4 Signal Descriptions
      1. 4.4.1  Video Input Ports (VIP)
      2. 4.4.2  Display Subsystem – Video Output Ports
      3. 4.4.3  Display Subsystem – High-Definition Multimedia Interface (HDMI)
      4. 4.4.4  Camera Serial Interface 2 CAL bridge (CSI2)
      5. 4.4.5  External Memory Interface (EMIF)
      6. 4.4.6  General-Purpose Memory Controller (GPMC)
      7. 4.4.7  Timers
      8. 4.4.8  Inter-Integrated Circuit Interface (I2C)
      9. 4.4.9  HDQ / 1-Wire Interface (HDQ1W)
      10. 4.4.10 Universal Asynchronous Receiver Transmitter (UART)
      11. 4.4.11 Multichannel Serial Peripheral Interface (McSPI)
      12. 4.4.12 Quad Serial Peripheral Interface (QSPI)
      13. 4.4.13 Multichannel Audio Serial Port (McASP)
      14. 4.4.14 Universal Serial Bus (USB)
      15. 4.4.15 SATA
      16. 4.4.16 Peripheral Component Interconnect Express (PCIe)
      17. 4.4.17 Controller Area Network Interface (DCAN)
      18. 4.4.18 Ethernet Interface (GMAC_SW)
      19. 4.4.19 Media Local Bus (MLB) Interface
      20. 4.4.20 eMMC/SD/SDIO
      21. 4.4.21 General-Purpose Interface (GPIO)
      22. 4.4.22 Keyboard controller (KBD)
      23. 4.4.23 Pulse Width Modulation (PWM) Interface
      24. 4.4.24 Programmable Real-Time Unit Subsystem and Industrial Communication Subsystem (PRU-ICSS)
      25. 4.4.25 Test Interfaces
      26. 4.4.26 System and Miscellaneous
        1. 4.4.26.1 Sysboot
        2. 4.4.26.2 Power, Reset, and Clock Management (PRCM)
        3. 4.4.26.3 Real-Time Clock (RTC) Interface
        4. 4.4.26.4 System Direct Memory Access (SDMA)
        5. 4.4.26.5 Interrupt Controllers (INTC)
        6. 4.4.26.6 Observability
      27. 4.4.27 Power Supplies
  5. 5 Specifications
    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
      1. 5.5.1 AVS and ABB Requirements
      2. 5.5.2 Voltage And Core Clock Specifications
      3. 5.5.3 Maximum Supported Frequency
    6. 5.6  Power Consumption Summary
    7. 5.7  Electrical Characteristics
      1. 5.7.1  LVCMOS DDR DC Electrical Characteristics
      2. 5.7.2  HDMIPHY DC Electrical Characteristics
      3. 5.7.3  Dual Voltage LVCMOS I2C DC Electrical Characteristics
      4. 5.7.4  IQ1833 Buffers DC Electrical Characteristics
      5. 5.7.5  IHHV1833 Buffers DC Electrical Characteristics
      6. 5.7.6  LVCMOS OSC Buffers DC Electrical Characteristics
      7. 5.7.7  LVCMOS CSI2 DC Electrical Characteristics
      8. 5.7.8  BMLB18 Buffers DC Electrical Characteristics
      9. 5.7.9  BC1833IHHV Buffers DC Electrical Characteristics
      10. 5.7.10 USBPHY DC Electrical Characteristics
      11. 5.7.11 Dual Voltage SDIO1833 DC Electrical Characteristics
      12. 5.7.12 Dual Voltage LVCMOS DC Electrical Characteristics
      13. 5.7.13 SATAPHY DC Electrical Characteristics
      14. 5.7.14 SERDES DC Electrical Characteristics
    8. 5.8  VPP Specifications for One-Time Programmable (OTP) eFuses
      1. Table 5-21 Recommended Operating Conditions for OTP eFuse Programming
      2. 5.8.1      Hardware Requirements
      3. 5.8.2      Programming Sequence
      4. 5.8.3      Impact to Your Hardware Warranty
    9. 5.9  Thermal Characteristics
      1. 5.9.1 Package Thermal Characteristics
    10. 5.10 Power Supply Sequences
  6. 6 Clock Specifications
    1. 6.1 Input Clock Specifications
      1. 6.1.1 Input Clock Requirements
      2. 6.1.2 System Oscillator OSC0 Input Clock
        1. 6.1.2.1 OSC0 External Crystal
        2. 6.1.2.2 OSC0 Input Clock
      3. 6.1.3 Auxiliary Oscillator OSC1 Input Clock
        1. 6.1.3.1 OSC1 External Crystal
        2. 6.1.3.2 OSC1 Input Clock
      4. 6.1.4 RTC Oscillator Input Clock
        1. 6.1.4.1 RTC Oscillator External Crystal
        2. 6.1.4.2 RTC Oscillator Input Clock
        3. 6.1.4.3 RC On-die Oscillator Clock
    2. 6.2 DPLLs, DLLs Specifications
      1. 6.2.1 DPLL Characteristics
      2. 6.2.2 DLL Characteristics
  7. 7 Timing Requirements and Switching Characteristics
    1. 7.1  Timing Test Conditions
    2. 7.2  Interface Clock Specifications
      1. 7.2.1 Interface Clock Terminology
      2. 7.2.2 Interface Clock Frequency
    3. 7.3  Timing Parameters and Information
      1. 7.3.1 Parameter Information
        1. 7.3.1.1 1.8V and 3.3V Signal Transition Levels
        2. 7.3.1.2 1.8V and 3.3V Signal Transition Rates
        3. 7.3.1.3 Timing Parameters and Board Routing Analysis
    4. 7.4  Recommended Clock and Control Signal Transition Behavior
    5. 7.5  Virtual and Manual I/O Timing Modes
    6. 7.6  Video Input Ports (VIP)
    7. 7.7  Display Subsystem - Video Output Ports
    8. 7.8  Display Subsystem - High-Definition Multimedia Interface (HDMI)
    9. 7.9  Camera Serial Interface 2 CAL bridge (CSI2)
      1. 7.9.1 CSI-2 MIPI D-PHY
    10. 7.10 External Memory Interface (EMIF)
    11. 7.11 General-Purpose Memory Controller (GPMC)
      1. 7.11.1 GPMC/NOR Flash Interface Synchronous Timing
      2. 7.11.2 GPMC/NOR Flash Interface Asynchronous Timing
      3. 7.11.3 GPMC/NAND Flash Interface Asynchronous Timing
    12. 7.12 Timers
    13. 7.13 Inter-Integrated Circuit Interface (I2C)
      1. Table 7-33 Timing Requirements for I2C Input Timings
      2. Table 7-34 Timing Requirements for I2C HS-Mode (I2C3/4/5 Only)
      3. Table 7-35 Switching Characteristics Over Recommended Operating Conditions for I2C Output Timings
    14. 7.14 HDQ / 1-Wire Interface (HDQ1W)
      1. 7.14.1 HDQ / 1-Wire - HDQ Mode
      2. 7.14.2 HDQ/1-Wire-1-Wire Mode
    15. 7.15 Universal Asynchronous Receiver Transmitter (UART)
      1. Table 7-40 Timing Requirements for UART
      2. Table 7-41 Switching Characteristics Over Recommended Operating Conditions for UART
    16. 7.16 Multichannel Serial Peripheral Interface (McSPI)
    17. 7.17 Quad Serial Peripheral Interface (QSPI)
    18. 7.18 Multichannel Audio Serial Port (McASP)
      1. Table 7-48 Timing Requirements for McASP1
      2. Table 7-49 Timing Requirements for McASP2
      3. Table 7-50 Timing Requirements for McASP3/4/5/6/7/8
    19. 7.19 Universal Serial Bus (USB)
      1. 7.19.1 USB1 DRD PHY
      2. 7.19.2 USB2 PHY
    20. 7.20 Serial Advanced Technology Attachment (SATA)
    21. 7.21 Peripheral Component Interconnect Express (PCIe)
    22. 7.22 Controller Area Network Interface (DCAN)
      1. Table 7-65 Timing Requirements for DCANx Receive
      2. Table 7-66 Switching Characteristics Over Recommended Operating Conditions for DCANx Transmit
    23. 7.23 Ethernet Interface (GMAC_SW)
      1. 7.23.1 GMAC MII Timings
        1. Table 7-67 Timing Requirements for miin_rxclk - MII Operation
        2. Table 7-68 Timing Requirements for miin_txclk - MII Operation
        3. Table 7-69 Timing Requirements for GMAC MIIn Receive 10/100 Mbit/s
        4. Table 7-70 Switching Characteristics Over Recommended Operating Conditions for GMAC MIIn Transmit 10/100 Mbits/s
      2. 7.23.2 GMAC MDIO Interface Timings
      3. 7.23.3 GMAC RMII Timings
        1. Table 7-75 Timing Requirements for GMAC REF_CLK - RMII Operation
        2. Table 7-76 Timing Requirements for GMAC RMIIn Receive
        3. Table 7-77 Switching Characteristics Over Recommended Operating Conditions for GMAC REF_CLK - RMII Operation
        4. Table 7-78 Switching Characteristics Over Recommended Operating Conditions for GMAC RMIIn Transmit 10/100 Mbits/s
      4. 7.23.4 GMAC RGMII Timings
        1. Table 7-82 Timing Requirements for rgmiin_rxc - RGMIIn Operation
        2. Table 7-83 Timing Requirements for GMAC RGMIIn Input Receive for 10/100/1000 Mbps
        3. Table 7-84 Switching Characteristics Over Recommended Operating Conditions for rgmiin_txctl - RGMIIn Operation for 10/100/1000 Mbit/s
        4. Table 7-85 Switching Characteristics for GMAC RGMIIn Output Transmit for 10/100/1000 Mbps
    24. 7.24 eMMC/SD/SDIO
      1. 7.24.1 MMC1-SD Card Interface
        1. 7.24.1.1 Default speed, 4-bit data, SDR, half-cycle
        2. 7.24.1.2 High speed, 4-bit data, SDR, half-cycle
        3. 7.24.1.3 SDR12, 4-bit data, half-cycle
        4. 7.24.1.4 SDR25, 4-bit data, half-cycle
        5. 7.24.1.5 UHS-I SDR50, 4-bit data, half-cycle
        6. 7.24.1.6 UHS-I SDR104, 4-bit data, half-cycle
        7. 7.24.1.7 UHS-I DDR50, 4-bit data
      2. 7.24.2 MMC2 - eMMC
        1. 7.24.2.1 Standard JC64 SDR, 8-bit data, half cycle
        2. 7.24.2.2 High Speed JC64 SDR, 8-bit data, half cycle
        3. 7.24.2.3 High Speed HS200 JEDS84, 8-bit data, half cycle
        4. 7.24.2.4 High Speed JC64 DDR, 8-bit data
          1. Table 7-110 Switching Characteristics for MMC2 - JC64 High Speed DDR Mode
      3. 7.24.3 MMC3 and MMC4-SDIO/SD
        1. 7.24.3.1 MMC3 and MMC4, SD Default Speed
        2. 7.24.3.2 MMC3 and MMC4, SD High Speed
        3. 7.24.3.3 MMC3 and MMC4, SD and SDIO SDR12 Mode
        4. 7.24.3.4 MMC3 and MMC4, SD SDR25 Mode
        5. 7.24.3.5 MMC3 SDIO High Speed UHS-I SDR50 Mode, Half Cycle
    25. 7.25 General-Purpose Interface (GPIO)
    26. 7.26 PRU-ICSS Interfaces
      1. 7.26.1 Programmable Real-Time Unit (PRU-ICSS PRU)
        1. 7.26.1.1 PRU-ICSS PRU Direct Input/Output Mode Electrical Data and Timing
          1. Table 7-132 PRU-ICSS PRU Timing Requirements - Direct Input Mode
          2. Table 7-133 PRU-ICSS PRU Switching Requirements - Direct Output Mode
        2. 7.26.1.2 PRU-ICSS PRU Parallel Capture Mode Electrical Data and Timing
          1. Table 7-134 PRU-ICSS PRU Timing Requirements - Parallel Capture Mode
        3. 7.26.1.3 PRU-ICSS PRU Shift Mode Electrical Data and Timing
          1. Table 7-135 PRU-ICSS PRU Timing Requirements - Shift In Mode
          2. Table 7-136 PRU-ICSS PRU Switching Requirements - Shift Out Mode
        4. 7.26.1.4 PRU-ICSS PRU Sigma Delta and EnDAT Modes
          1. Table 7-137 PRU-ICSS PRU Timing Requirements - Sigma Delta Mode
          2. Table 7-138 PRU-ICSS PRU Timing Requirements - EnDAT Mode
          3. Table 7-139 PRU-ICSS PRU Switching Requirements - EnDAT Mode
      2. 7.26.2 PRU-ICSS EtherCAT (PRU-ICSS ECAT)
        1. 7.26.2.1 PRU-ICSS ECAT Electrical Data and Timing
          1. Table 7-140 PRU-ICSS ECAT Timing Requirements - Input Validated With LATCH_IN
          2. Table 7-141 PRU-ICSS ECAT Timing Requirements - Input Validated With SYNCx
          3. Table 7-142 PRU-ICSS ECAT Timing Requirements - Input Validated With Start of Frame (SOF)
          4. Table 7-143 PRU-ICSS ECAT Timing Requirements - LATCHx_IN
          5. Table 7-144 PRU-ICSS ECAT Switching Requirements - Digital IOs
      3. 7.26.3 PRU-ICSS MII_RT and Switch
        1. 7.26.3.1 PRU-ICSS MDIO Electrical Data and Timing
          1. Table 7-145 PRU-ICSS MDIO Timing Requirements - MDIO_DATA
          2. Table 7-146 PRU-ICSS MDIO Switching Characteristics - MDIO_CLK
          3. Table 7-147 PRU-ICSS MDIO Switching Characteristics - MDIO_DATA
        2. 7.26.3.2 PRU-ICSS MII_RT Electrical Data and Timing
          1. Table 7-148 PRU-ICSS MII_RT Timing Requirements - MII[x]_RXCLK
          2. Table 7-149 PRU-ICSS MII_RT Timing Requirements - MII[x]_TXCLK
          3. Table 7-150 PRU-ICSS MII_RT Timing Requirements - MII_RXD[3:0], MII_RXDV, and MII_RXER
          4. Table 7-151 PRU-ICSS MII_RT Switching Characteristics - MII_TXD[3:0] and MII_TXEN
      4. 7.26.4 PRU-ICSS Universal Asynchronous Receiver Transmitter (PRU-ICSS UART)
        1. Table 7-152 Timing Requirements for PRU-ICSS UART Receive
        2. Table 7-153 Switching Characteristics Over Recommended Operating Conditions for PRU-ICSS UART Transmit
      5. 7.26.5 PRU-ICSS Manual Functional Mapping
    27. 7.27 System and Miscellaneous interfaces
    28. 7.28 Test Interfaces
      1. 7.28.1 IEEE 1149.1 Standard-Test-Access Port (JTAG)
        1. 7.28.1.1 JTAG Electrical Data/Timing
          1. Table 7-173 Timing Requirements for IEEE 1149.1 JTAG
          2. Table 7-174 Switching Characteristics Over Recommended Operating Conditions for IEEE 1149.1 JTAG
          3. Table 7-175 Timing Requirements for IEEE 1149.1 JTAG With RTCK
          4. Table 7-176 Switching Characteristics Over Recommended Operating Conditions for IEEE 1149.1 JTAG With RTCK
      2. 7.28.2 Trace Port Interface Unit (TPIU)
        1. 7.28.2.1 TPIU PLL DDR Mode
  8. 8 Applications, Implementation, and Layout
    1. 8.1 Power Supply Mapping
    2. 8.2 DDR3 Board Design and Layout Guidelines
      1. 8.2.1 DDR3 General Board Layout Guidelines
      2. 8.2.2 DDR3 Board Design and Layout Guidelines
        1. 8.2.2.1  Board Designs
        2. 8.2.2.2  DDR3 EMIF
        3. 8.2.2.3  DDR3 Device Combinations
        4. 8.2.2.4  DDR3 Interface Schematic
          1. 8.2.2.4.1 32-Bit DDR3 Interface
          2. 8.2.2.4.2 16-Bit DDR3 Interface
        5. 8.2.2.5  Compatible JEDEC DDR3 Devices
        6. 8.2.2.6  PCB Stackup
        7. 8.2.2.7  Placement
        8. 8.2.2.8  DDR3 Keepout Region
        9. 8.2.2.9  Bulk Bypass Capacitors
        10. 8.2.2.10 High Speed Bypass Capacitors
          1. 8.2.2.10.1 Return Current Bypass Capacitors
        11. 8.2.2.11 Net Classes
        12. 8.2.2.12 DDR3 Signal Termination
        13. 8.2.2.13 VREF_DDR Routing
        14. 8.2.2.14 VTT
        15. 8.2.2.15 CK and ADDR_CTRL Topologies and Routing Definition
          1. 8.2.2.15.1 Four DDR3 Devices
            1. 8.2.2.15.1.1 CK and ADDR_CTRL Topologies, Four DDR3 Devices
            2. 8.2.2.15.1.2 CK and ADDR_CTRL Routing, Four DDR3 Devices
          2. 8.2.2.15.2 Two DDR3 Devices
            1. 8.2.2.15.2.1 CK and ADDR_CTRL Topologies, Two DDR3 Devices
            2. 8.2.2.15.2.2 CK and ADDR_CTRL Routing, Two DDR3 Devices
          3. 8.2.2.15.3 One DDR3 Device
            1. 8.2.2.15.3.1 CK and ADDR_CTRL Topologies, One DDR3 Device
            2. 8.2.2.15.3.2 CK and ADDR/CTRL Routing, One DDR3 Device
        16. 8.2.2.16 Data Topologies and Routing Definition
          1. 8.2.2.16.1 DQS and DQ/DM Topologies, Any Number of Allowed DDR3 Devices
          2. 8.2.2.16.2 DQS and DQ/DM Routing, Any Number of Allowed DDR3 Devices
        17. 8.2.2.17 Routing Specification
          1. 8.2.2.17.1 CK and ADDR_CTRL Routing Specification
          2. 8.2.2.17.2 DQS and DQ Routing Specification
    3. 8.3 High Speed Differential Signal Routing Guidance
    4. 8.4 Power Distribution Network Implementation Guidance
    5. 8.5 Thermal Solution Guidance
    6. 8.6 Single-Ended Interfaces
      1. 8.6.1 General Routing Guidelines
      2. 8.6.2 QSPI Board Design and Layout Guidelines
    7. 8.7 LJCB_REFN/P Connections
    8. 8.8 Clock Routing Guidelines
      1. 8.8.1 32-kHz Oscillator Routing
      2. 8.8.2 Oscillator Ground Connection
  9. 9 Device and Documentation Support
    1. 9.1 Device Nomenclature
      1. 9.1.1 Standard Package Symbolization
      2. 9.1.2 Device Naming Convention
    2. 9.2 Tools and Software
    3. 9.3 Documentation Support
    4. 9.4 Related Links
    5. 9.5 Support Resources
    6. 9.6 Trademarks
    7. 9.7 Electrostatic Discharge Caution
    8. 9.8 Glossary
  10. 10Mechanical, Packaging, and Orderable Information
    1. 10.1 Packaging Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • ABC|760
Thermal pad, mechanical data (Package|Pins)
Orderable Information

4.4.18 Ethernet Interface (GMAC_SW)

CAUTION

The I/O timing provided in Section 7, Timing Requirements and Switching Characteristics are valid only if signals within a single IOSET are used. The IOSETs are defined in Table 7-71, Table 7-74, Table 7-79 and Table 7-86.

NOTE

For more information, see Gigabit Ethernet Switch (GMAC_SW) section in the device TRM.

Table 4-21 GMAC Signal Descriptions

SIGNAL NAME DESCRIPTION TYPE BALL
rgmii0_txc RGMII0 Transmit Clock O W9
rgmii0_txctl RGMII0 Transmit Enable O V9
rgmii0_txd3 RGMII0 Transmit Data O V7
rgmii0_txd2 RGMII0 Transmit Data O U7
rgmii0_txd1 RGMII0 Transmit Data O V6
rgmii0_txd0 RGMII0 Transmit Data O U6
rgmii0_rxc RGMII0 Receive Clock I U5
rgmii0_rxctl RGMII0 Receive Control I V5
rgmii0_rxd3 RGMII0 Receive Data I V4
rgmii0_rxd2 RGMII0 Receive Data I V3
rgmii0_rxd1 RGMII0 Receive Data I Y2
rgmii0_rxd0 RGMII0 Receive Data I W2
rgmii1_txc RGMII1 Transmit Clock O D5
rgmii1_txctl RGMII1 Transmit Enable O C2
rgmii1_txd3 RGMII1 Transmit Data O C3
rgmii1_txd2 RGMII1 Transmit Data O C4
rgmii1_txd1 RGMII1 Transmit Data O B2
rgmii1_txd0 RGMII1 Transmit Data O D6
rgmii1_rxc RGMII1 Receive Clock I C5
rgmii1_rxctl RGMII1 Receive Control I A3
rgmii1_rxd3 RGMII1 Receive Data I B3
rgmii1_rxd2 RGMII1 Receive Data I B4
rgmii1_rxd1 RGMII1 Receive Data I B5
rgmii1_rxd0 RGMII1 Receive Data I A4
mii1_rxd1 MII1 Receive Data I C1
mii1_rxd2 MII1 Receive Data I E4
mii1_rxd3 MII1 Receive Data I F5
mii1_rxd0 MII1 Receive Data I E6
mii1_rxclk MII1 Receive Clock I D5
mii1_rxdv MII1 Receive Data Valid I C2
mii1_txclk MII1 Transmit Clock I C3
mii1_txd0 MII1 Transmit Data O C4
mii1_txd1 MII1 Transmit Data O B2
mii1_txd2 MII1 Transmit Data O D6
mii1_txd3 MII1 Transmit Data O C5
mii1_txer MII1 Transmit Error I A3
mii1_rxer MII1 Receive Data Error I B3
mii1_col MII1 Collision Detect (Sense) I B4
mii1_crs MII1 Carrier Sense I B5
mii1_txen MII1 Transmit Data Enable O A4
mii0_rxd1 MII0 Receive Data I V6
mii0_rxd2 MII0 Receive Data I V9
mii0_rxd3 MII0 Receive Data I W9
mii0_rxd0 MII0 Receive Data I U6
mii0_rxclk MII0 Receive Clock I Y1
mii0_rxdv MII0 Receive Data Valid I V2
mii0_txclk MII0 Transmit Clock I U5
mii0_txd0 MII0 Transmit Data O W2
mii0_txd1 MII0 Transmit Data O Y2
mii0_txd2 MII0 Transmit Data O V4
mii0_txd3 MII0 Transmit Data O V5
mii0_txer MII0 Transmit Error I U4
mii0_rxer MII0 Receive Data Error I U7
mii0_col MII0 Collision Detect (Sense) I V1
mii0_crs MII0 Carrier Sense I V7
mii0_txen MII0 Transmit Data Enable O V3
rmii1_crs RMII1 Carrier Sense I V2
rmii1_rxer RMII1 Receive Data Error I Y1
rmii1_rxd1 RMII1 Receive Data I W9
rmii1_rxd0 RMII1 Receive Data I V9
rmii1_txen RMII1 Transmit Data Enable O U5
rmii1_txd1 RMII1 Transmit Data O V5
rmii1_txd0 RMII1 Transmit Data O V4
rmii0_crs RMII0 Carrier Sense I V7
rmii0_rxer RMII0 Receive Data Error I U7
rmii0_rxd1 RMII0 Receive Data I V6
rmii0_rxd0 RMII0 Receive Data I U6
rmii0_txen RMII0 Transmit Data Enable O V3
rmii0_txd1 RMII0 Transmit Data O Y2
rmii0_txd0 RMII0 Transmit Data O W2
mdio_mclk Management Data Serial Clock O AC5 / V1 / B21 / D3
mdio_d Management Data IO AB4 / U4 / B20 / F6