SPRS717L October   2011  – March 2020 AM3351 , AM3352 , AM3354 , AM3356 , AM3357 , AM3358 , AM3359

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
      1. 4.1.1 ZCE Package Pin Maps (Top View)
        1. Table 4-1 ZCE Pin Map [Section Left - Top View]
        2.       ZCE Pin Map [Section Middle - Top View]
        3.       ZCE Pin Map [Section Right - Top View]
      2. 4.1.2 ZCZ Package Pin Maps (Top View)
        1.       ZCZ Pin Map [Section Left - Top View]
        2.       ZCZ Pin Map [Section Middle - Top View]
        3.       ZCZ Pin Map [Section Right - Top View]
    2. 4.2 Pin Attributes
    3. 4.3 Signal Descriptions
      1. 4.3.1 External Memory Interfaces
      2. 4.3.2 General-Purpose IOs
      3. 4.3.3 Miscellaneous
        1. 4.3.3.1 eCAP
        2. 4.3.3.2 eHRPWM
        3. 4.3.3.3 eQEP
        4. 4.3.3.4 Timer
      4. 4.3.4 PRU-ICSS
        1. 4.3.4.1 PRU0
        2. 4.3.4.2 PRU1
      5. 4.3.5 Removable Media Interfaces
      6. 4.3.6 Serial Communication Interfaces
        1. 4.3.6.1 CAN
        2. 4.3.6.2 GEMAC_CPSW
        3. 4.3.6.3 I2C
        4. 4.3.6.4 McASP
        5. 4.3.6.5 SPI
        6. 4.3.6.6 UART
        7. 4.3.6.7 USB
  5. 5Specifications
    1. 5.1  Absolute Maximum Ratings
    2. 5.2  ESD Ratings
    3. 5.3  Power-On Hours (POH)
    4. 5.4  Operating Performance Points (OPPs)
    5. 5.5  Recommended Operating Conditions
    6. 5.6  Power Consumption Summary
    7. 5.7  DC Electrical Characteristics
    8. 5.8  Thermal Resistance Characteristics for ZCE and ZCZ Packages
    9. 5.9  External Capacitors
      1. 5.9.1 Voltage Decoupling Capacitors
        1. 5.9.1.1 Core Voltage Decoupling Capacitors
        2. 5.9.1.2 I/O and Analog Voltage Decoupling Capacitors
      2. 5.9.2 Output Capacitors
    10. 5.10 Touch Screen Controller and Analog-to-Digital Subsystem Electrical Parameters
  6. 6Power and Clocking
    1. 6.1 Power Supplies
      1. 6.1.1 Power Supply Slew Rate Requirement
      2. 6.1.2 Power-Down Sequencing
      3. 6.1.3 VDD_MPU_MON Connections
      4. 6.1.4 Digital Phase-Locked Loop Power Supply Requirements
    2. 6.2 Clock Specifications
      1. 6.2.1 Input Clock Specifications
      2. 6.2.2 Input Clock Requirements
        1. 6.2.2.1 OSC0 Internal Oscillator Clock Source
          1. Table 6-2 OSC0 Crystal Circuit Requirements
          2. Table 6-3 OSC0 Crystal Circuit Characteristics
        2. 6.2.2.2 OSC0 LVCMOS Digital Clock Source
        3. 6.2.2.3 OSC1 Internal Oscillator Clock Source
          1. Table 6-5 OSC1 Crystal Circuit Requirements
          2. Table 6-6 OSC1 Crystal Circuit Characteristics
        4. 6.2.2.4 OSC1 LVCMOS Digital Clock Source
        5. 6.2.2.5 OSC1 Not Used
      3. 6.2.3 Output Clock Specifications
      4. 6.2.4 Output Clock Characteristics
        1. 6.2.4.1 CLKOUT1
        2. 6.2.4.2 CLKOUT2
  7. 7Peripheral Information and Timings
    1. 7.1  Parameter Information
      1. 7.1.1 Timing Parameters and Board Routing Analysis
    2. 7.2  Recommended Clock and Control Signal Transition Behavior
    3. 7.3  OPP50 Support
    4. 7.4  Controller Area Network (CAN)
      1. 7.4.1 DCAN Electrical Data and Timing
        1. Table 7-1 DCAN Timing Conditions
        2. Table 7-2 Timing Requirements for DCANx Receive
        3. Table 7-3 Switching Characteristics for DCANx Transmit
    5. 7.5  DMTimer
      1. 7.5.1 DMTimer Electrical Data and Timing
        1. Table 7-4 DMTimer Timing Conditions
        2. Table 7-5 Timing Requirements for DMTimer [1-7]
        3. Table 7-6 Switching Characteristics for DMTimer [4-7]
    6. 7.6  Ethernet Media Access Controller (EMAC) and Switch
      1. 7.6.1 EMAC and Switch Electrical Data and Timing
        1. Table 7-7 EMAC and Switch Timing Conditions
        2. 7.6.1.1   EMAC/Switch MDIO Electrical Data and Timing
          1. Table 7-8  Timing Requirements for MDIO_DATA
          2. Table 7-9  Switching Characteristics for MDIO_CLK
          3. Table 7-10 Switching Characteristics for MDIO_DATA
        3. 7.6.1.2   EMAC and Switch MII Electrical Data and Timing
          1. Table 7-11 Timing Requirements for GMII[x]_RXCLK - MII Mode
          2. Table 7-12 Timing Requirements for GMII[x]_TXCLK - MII Mode
          3. Table 7-13 Timing Requirements for GMII[x]_RXD[3:0], GMII[x]_RXDV, and GMII[x]_RXER - MII Mode
          4. Table 7-14 Switching Characteristics for GMII[x]_TXD[3:0], and GMII[x]_TXEN - MII Mode
        4. 7.6.1.3   EMAC and Switch RMII Electrical Data and Timing
          1. Table 7-15 Timing Requirements for RMII[x]_REFCLK - RMII Mode
          2. Table 7-16 Timing Requirements for RMII[x]_RXD[1:0], RMII[x]_CRS_DV, and RMII[x]_RXER - RMII Mode
          3. Table 7-17 Switching Characteristics for RMII[x]_TXD[1:0], and RMII[x]_TXEN - RMII Mode
        5. 7.6.1.4   EMAC and Switch RGMII Electrical Data and Timing
          1. Table 7-18 Timing Requirements for RGMII[x]_RCLK - RGMII Mode
          2. Table 7-19 Timing Requirements for RGMII[x]_RD[3:0], and RGMII[x]_RCTL - RGMII Mode
          3. Table 7-20 Switching Characteristics for RGMII[x]_TCLK - RGMII Mode
          4. Table 7-21 Switching Characteristics for RGMII[x]_TD[3:0], and RGMII[x]_TCTL - RGMII Mode
    7. 7.7  External Memory Interfaces
      1. 7.7.1 General-Purpose Memory Controller (GPMC)
        1. 7.7.1.1 GPMC and NOR Flash—Synchronous Mode
          1. Table 7-22 GPMC and NOR Flash Timing Conditions—Synchronous Mode
          2. Table 7-23 GPMC and NOR Flash Timing Requirements—Synchronous Mode
          3. Table 7-24 GPMC and NOR Flash Switching Characteristics—Synchronous Mode
        2. 7.7.1.2 GPMC and NOR Flash—Asynchronous Mode
          1. Table 7-25 GPMC and NOR Flash Timing Conditions—Asynchronous Mode
          2. Table 7-26 GPMC and NOR Flash Internal Timing Requirements—Asynchronous Mode
          3. Table 7-27 GPMC and NOR Flash Timing Requirements—Asynchronous Mode
          4. Table 7-28 GPMC and NOR Flash Switching Characteristics—Asynchronous Mode
        3. 7.7.1.3 GPMC and NAND Flash—Asynchronous Mode
          1. Table 7-29 GPMC and NAND Flash Timing Conditions—Asynchronous Mode
          2. Table 7-30 GPMC and NAND Flash Internal Timing Requirements—Asynchronous Mode
          3. Table 7-31 GPMC and NAND Flash Timing Requirements—Asynchronous Mode
          4. Table 7-32 GPMC and NAND Flash Switching Characteristics—Asynchronous Mode
      2. 7.7.2 mDDR(LPDDR), DDR2, DDR3, DDR3L Memory Interface
        1. 7.7.2.1 mDDR (LPDDR) Routing Guidelines
          1. 7.7.2.1.1 Board Designs
          2. 7.7.2.1.2 LPDDR Interface
            1. 7.7.2.1.2.1 LPDDR Interface Schematic
            2. 7.7.2.1.2.2 Compatible JEDEC LPDDR Devices
              1. Table 7-34 Compatible JEDEC LPDDR Devices (Per Interface)
            3. 7.7.2.1.2.3 PCB Stackup
            4. 7.7.2.1.2.4 Placement
            5. 7.7.2.1.2.5 LPDDR Keepout Region
            6. 7.7.2.1.2.6 Bulk Bypass Capacitors
            7. 7.7.2.1.2.7 High-Speed Bypass Capacitors
            8. 7.7.2.1.2.8 Net Classes
            9. 7.7.2.1.2.9 LPDDR Signal Termination
          3. 7.7.2.1.3 LPDDR CK and ADDR_CTRL Routing
        2. 7.7.2.2 DDR2 Routing Guidelines
          1. 7.7.2.2.1 Board Designs
          2. 7.7.2.2.2 DDR2 Interface
            1. 7.7.2.2.2.1  DDR2 Interface Schematic
            2. 7.7.2.2.2.2  Compatible JEDEC DDR2 Devices
              1. Table 7-46 Compatible JEDEC DDR2 Devices (Per Interface)
            3. 7.7.2.2.2.3  PCB Stackup
            4. 7.7.2.2.2.4  Placement
            5. 7.7.2.2.2.5  DDR2 Keepout Region
            6. 7.7.2.2.2.6  Bulk Bypass Capacitors
            7. 7.7.2.2.2.7  High-Speed (HS) Bypass Capacitors
            8. 7.7.2.2.2.8  Net Classes
            9. 7.7.2.2.2.9  DDR2 Signal Termination
            10. 7.7.2.2.2.10 DDR_VREF Routing
          3. 7.7.2.2.3 DDR2 CK and ADDR_CTRL Routing
        3. 7.7.2.3 DDR3 and DDR3L Routing Guidelines
          1. 7.7.2.3.1 Board Designs
            1. 7.7.2.3.1.1 DDR3 versus DDR2
          2. 7.7.2.3.2 DDR3 Device Combinations
          3. 7.7.2.3.3 DDR3 Interface
            1. 7.7.2.3.3.1  DDR3 Interface Schematic
            2. 7.7.2.3.3.2  Compatible JEDEC DDR3 Devices
            3. 7.7.2.3.3.3  PCB Stackup
            4. 7.7.2.3.3.4  Placement
            5. 7.7.2.3.3.5  DDR3 Keepout Region
            6. 7.7.2.3.3.6  Bulk Bypass Capacitors
            7. 7.7.2.3.3.7  High-Speed Bypass Capacitors
              1. 7.7.2.3.3.7.1 Return Current Bypass Capacitors
            8. 7.7.2.3.3.8  Net Classes
            9. 7.7.2.3.3.9  DDR3 Signal Termination
            10. 7.7.2.3.3.10 DDR_VREF Routing
            11. 7.7.2.3.3.11 VTT
          4. 7.7.2.3.4 DDR3 CK and ADDR_CTRL Topologies and Routing Definition
            1. 7.7.2.3.4.1 Two DDR3 Devices
              1. 7.7.2.3.4.1.1 CK and ADDR_CTRL Topologies, Two DDR3 Devices
              2. 7.7.2.3.4.1.2 CK and ADDR_CTRL Routing, Two DDR3 Devices
            2. 7.7.2.3.4.2 One DDR3 Device
              1. 7.7.2.3.4.2.1 CK and ADDR_CTRL Topologies, One DDR3 Device
              2. 7.7.2.3.4.2.2 CK and ADDR_CTRL Routing, One DDR3 Device
          5. 7.7.2.3.5 Data Topologies and Routing Definition
            1. 7.7.2.3.5.1 DQS[x] and DQ[x] Topologies, Any Number of Allowed DDR3 Devices
            2. 7.7.2.3.5.2 DQS[x] and DQ[x] Routing, Any Number of Allowed DDR3 Devices
          6. 7.7.2.3.6 Routing Specification
            1. 7.7.2.3.6.1 CK and ADDR_CTRL Routing Specification
            2. 7.7.2.3.6.2 DQS[x] and DQ[x] Routing Specification
    8. 7.8  I2C
      1. 7.8.1 I2C Electrical Data and Timing
        1. Table 7-70 I2C Timing Conditions – Slave Mode
        2. Table 7-71 Timing Requirements for I2C Input Timings
        3. Table 7-72 Switching Characteristics for I2C Output Timings
    9. 7.9  JTAG Electrical Data and Timing
      1. Table 7-73 JTAG Timing Conditions
      2. Table 7-74 Timing Requirements for JTAG
      3. Table 7-75 Switching Characteristics for JTAG
    10. 7.10 LCD Controller (LCDC)
      1. Table 7-76 LCD Controller Timing Conditions
      2. 7.10.1     LCD Interface Display Driver (LIDD Mode)
        1. Table 7-77 Timing Requirements for LCD LIDD Mode
        2. Table 7-78 Switching Characteristics for LCD LIDD Mode
      3. 7.10.2     LCD Raster Mode
        1. Table 7-79 Switching Characteristics for LCD Raster Mode
    11. 7.11 Multichannel Audio Serial Port (McASP)
      1. 7.11.1 McASP Device-Specific Information
      2. 7.11.2 McASP Electrical Data and Timing
        1. Table 7-80 McASP Timing Conditions
        2. Table 7-81 Timing Requirements for McASP
        3. Table 7-82 Switching Characteristics for McASP
    12. 7.12 Multichannel Serial Port Interface (McSPI)
      1. 7.12.1 McSPI Electrical Data and Timing
        1. 7.12.1.1 McSPI—Slave Mode
          1. Table 7-83 McSPI Timing Conditions – Slave Mode
          2. Table 7-84 Timing Requirements for McSPI Input Timings—Slave Mode
          3. Table 7-85 Switching Characteristics for McSPI Output Timings—Slave Mode
        2. 7.12.1.2 McSPI—Master Mode
          1. Table 7-86 McSPI Timing Conditions – Master Mode
          2. Table 7-87 Timing Requirements for McSPI Input Timings – Master Mode
          3. Table 7-88 Switching Characteristics for McSPI Output Timings – Master Mode
    13. 7.13 Multimedia Card (MMC) Interface
      1. 7.13.1 MMC Electrical Data and Timing
        1. Table 7-89 MMC Timing Conditions
        2. Table 7-90 Timing Requirements for MMC[x]_CMD and MMC[x]_DAT[7:0]
        3. Table 7-91 Switching Characteristics for MMC[x]_CLK
        4. Table 7-92 Switching Characteristics for MMC[x]_CMD and MMC[x]_DAT[7:0]—Standard Mode
        5. Table 7-93 Switching Characteristics for MMC[x]_CMD and MMC[x]_DAT[7:0]—High-Speed Mode
    14. 7.14 Programmable Real-Time Unit Subsystem and Industrial Communication Subsystem (PRU-ICSS)
      1. 7.14.1 Programmable Real-Time Unit (PRU-ICSS PRU)
        1. Table 7-94 PRU-ICSS PRU Timing Conditions
        2. 7.14.1.1   PRU-ICSS PRU Direct Input/Output Mode Electrical Data and Timing
          1. Table 7-95 PRU-ICSS PRU Timing Requirements - Direct Input Mode
          2. Table 7-96 PRU-ICSS PRU Switching Requirements – Direct Output Mode
        3. 7.14.1.2   PRU-ICSS PRU Parallel Capture Mode Electrical Data and Timing
          1. Table 7-97 PRU-ICSS PRU Timing Requirements - Parallel Capture Mode
        4. 7.14.1.3   PRU-ICSS PRU Shift Mode Electrical Data and Timing
          1. Table 7-98 PRU-ICSS PRU Timing Requirements – Shift In Mode
          2. Table 7-99 PRU-ICSS PRU Switching Requirements - Shift Out Mode
      2. 7.14.2 PRU-ICSS EtherCAT (PRU-ICSS ECAT)
        1. Table 7-100 PRU-ICSS ECAT Timing Conditions
        2. 7.14.2.1    PRU-ICSS ECAT Electrical Data and Timing
          1. Table 7-101 PRU-ICSS ECAT Timing Requirements – Input Validated With LATCH_IN
          2. Table 7-102 PRU-ICSS ECAT Timing Requirements – Input Validated With SYNCx
          3. Table 7-103 PRU-ICSS ECAT Timing Requirements – Input Validated With Start of Frame (SOF)
          4. Table 7-104 PRU-ICSS ECAT Timing Requirements - LATCHx_IN
          5. Table 7-105 PRU-ICSS ECAT Switching Requirements - Digital I/Os
      3. 7.14.3 PRU-ICSS MII_RT and Switch
        1. Table 7-106 PRU-ICSS MII_RT Switch Timing Conditions
        2. 7.14.3.1    PRU-ICSS MDIO Electrical Data and Timing
          1. Table 7-107 PRU-ICSS MDIO Timing Requirements – MDIO_DATA
          2. Table 7-108 PRU-ICSS MDIO Switching Characteristics - MDIO_CLK
          3. Table 7-109 PRU-ICSS MDIO Switching Characteristics – MDIO_DATA
        3. 7.14.3.2    PRU-ICSS MII_RT Electrical Data and Timing
          1. Table 7-110 PRU-ICSS MII_RT Timing Requirements – MII_RXCLK
          2. Table 7-111 PRU-ICSS MII_RT Timing Requirements - MII[x]_TXCLK
          3. Table 7-112 PRU-ICSS MII_RT Timing Requirements - MII_RXD[3:0], MII_RXDV, and MII_RXER
          4. Table 7-113 PRU-ICSS MII_RT Switching Characteristics - MII_TXD[3:0] and MII_TXEN
      4. 7.14.4 PRU-ICSS Universal Asynchronous Receiver Transmitter (PRU-ICSS UART)
        1. Table 7-114 UART Timing Conditions
        2. Table 7-115 Timing Requirements for PRU-ICSS UART Receive
        3. Table 7-116 Switching Characteristics Over Recommended Operating Conditions for PRU-ICSS UART Transmit
    15. 7.15 Universal Asynchronous Receiver Transmitter (UART)
      1. 7.15.1 UART Electrical Data and Timing
        1. Table 7-117 UART Timing Conditions
        2. Table 7-118 Timing Requirements for UARTx Receive
        3. Table 7-119 Switching Characteristics for UARTx Transmit
      2. 7.15.2 UART IrDA Interface
  8. 8Device and Documentation Support
    1. 8.1 Device Nomenclature
    2. 8.2 Tools and Software
    3. 8.3 Documentation Support
    4. 8.4 Related Links
    5. 8.5 Support Resources
    6. 8.6 Trademarks
    7. 8.7 Electrostatic Discharge Caution
    8. 8.8 Glossary
  9. 9Mechanical, Packaging, and Orderable Information
    1. 9.1 Via Channel
    2. 9.2 Packaging Information

7.7.2.3.3.7 High-Speed Bypass Capacitors

High-speed (HS) bypass capacitors are critical for proper DDR3 interface operation. It is particularly important to minimize the parasitic series inductance of the HS bypass capacitors, the AM335x device DDR3 power, and the AM335x device DDR3 ground connections. Table 7-65 contains the specification for the HS bypass capacitors as well as for the power connections on the PCB. Generally speaking, it is good to:

  • Fit as many HS bypass capacitors as possible.
  • Minimize the distance from the bypass capacitor to the power terminals being bypassed.
  • Use the smallest physical sized capacitors possible with the highest capacitance readily available.
  • Connect the bypass capacitor pads to their vias using the widest traces possible and using the largest hole size via possible.
  • Minimize via sharing. Note the limits on via sharing shown in Table 7-65.

Table 7-65 High-Speed Bypass Capacitors

NO. PARAMETER MIN TYP MAX UNIT
1 HS bypass capacitor package size(1) 0201 0402 10 mils
2 Distance, HS bypass capacitor to AM335x VDDS_DDR and VSS terminal being bypassed(2)(3)(4) 400 mils
3 AM335x VDDS_DDR HS bypass capacitor count 20 devices
4 AM335x VDDS_DDR HS bypass capacitor total capacitance 1 μF
5 Trace length from AM335x VDDS_DDR and VSS terminal to connection via(2) 35 70 mils
6 Distance, HS bypass capacitor to DDR3 device being bypassed(5) 150 mils
7 DDR3 device HS bypass capacitor count(6) 12 devices
8 DDR3 device HS bypass capacitor total capacitance(6) 0.85 μF
9 Number of connection vias for each HS bypass capacitor(7)(8) 2 vias
10 Trace length from bypass capacitor connect to connection via(2)(8) 35 100 mils
11 Number of connection vias for each DDR3 device power and ground terminal(9) 1 vias
12 Trace length from DDR3 device power and ground terminal to connection via(2)(7) 35 60 mils
  1. LxW, 10-mil units; for example, a 0402 is a 40x20-mil surface-mount capacitor.
  2. Closer and shorter is better.
  3. Measured from the nearest AM335x VDDS_DDR and ground terminal to the center of the capacitor package.
  4. Three of these capacitors should be located underneath the AM335x device, between the cluster of VDDS_DDR and ground terminals, between the DDR3 interfaces on the package.
  5. Measured from the DDR3 device power and ground terminal to the center of the capacitor package.
  6. Per DDR3 device.
  7. An additional HS bypass capacitor can share the connection vias only if it is mounted on the opposite side of the board. No sharing of vias is permitted on the same side of the board.
  8. An HS bypass capacitor may share a via with a DDR3 device mounted on the same side of the PCB. A wide trace should be used for the connection and the length from the capacitor pad to the DDR3 device pad should be less than 150 mils.
  9. Up to two pairs of DDR3 power and ground terminals may share a via.