ZHCSE24B April   2015  – April 2019 AM3358-EP

PRODUCTION DATA.  

  1. 1器件概述
    1. 1.1 特性
    2. 1.2 应用范围
    3. 1.3 说明
    4. 1.4 功能方框图
  2. 2修订历史记录
  3. 3Device Features
    1. 3.1 Related Products
  4. 4Terminal Configuration and Functions
    1. 4.1 Pin Diagram
      1. 4.1.1 GCZ Package Pin Maps (Top View)
        1.       GCZ Pin Map [Section Left - Top View]
        2.       GCZ Pin Map [Section Middle - Top View]
        3.       GCZ 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 GCZ Package
    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 MII_RT and Switch
        1. Table 7-100 PRU-ICSS MII_RT Switch Timing Conditions
        2. 7.14.2.1    PRU-ICSS MDIO Electrical Data and Timing
          1. Table 7-101 PRU-ICSS MDIO Timing Requirements – MDIO_DATA
          2. Table 7-102 PRU-ICSS MDIO Switching Characteristics - MDIO_CLK
          3. Table 7-103 PRU-ICSS MDIO Switching Characteristics – MDIO_DATA
        3. 7.14.2.2    PRU-ICSS MII_RT Electrical Data and Timing
          1. Table 7-104 PRU-ICSS MII_RT Timing Requirements – MII_RXCLK
          2. Table 7-105 PRU-ICSS MII_RT Timing Requirements - MII[x]_TXCLK
          3. Table 7-106 PRU-ICSS MII_RT Timing Requirements - MII_RXD[3:0], MII_RXDV, and MII_RXER
          4. Table 7-107 PRU-ICSS MII_RT Switching Characteristics - MII_TXD[3:0] and MII_TXEN
      3. 7.14.3 PRU-ICSS Universal Asynchronous Receiver Transmitter (PRU-ICSS UART)
        1. Table 7-108 UART Timing Conditions
        2. Table 7-109 Timing Requirements for PRU-ICSS UART Receive
        3. Table 7-110 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 7-111 Timing Requirements for UARTx Receive
        2. Table 7-112 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 Community Resources
    5. 8.5 商标
    6. 8.6 静电放电警告
    7. 8.7 Glossary
  9. 9Mechanical, Packaging, and Orderable Information
    1. 9.1 Via Channel
    2. 9.2 Packaging Information

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6.1.1 Power Supply Slew Rate Requirement

To maintain the safe operating range of the internal ESD protection devices, TI recommends limiting the maximum slew rate for powering on the supplies to be less than 1.0E +5 V/s. For instance, as shown in Figure 6-1, TI recommends a value greater than 18 µs for the supply ramp slew for a 1.8-V supply.

AM3358-EP slew_rate_sprs717.gifFigure 6-1 Power Supply Slew and Slew Rate
AM3358-EP power_sequence_preferred_dual_3_3.gif
A. RTC_PWRONRSTn should be asserted for at least 1 ms to provide enough time for the internal RTC LDO output to reach a valid level before RTC reset is released.
B. When using the GCZ package option, VDD_MPU and VDD_CORE power inputs may be powered from the same source if the application only uses operating performance points (OPPs) that define a common power supply voltage for VDD_MPU and VDD_CORE.
C. If a USB port is not used, the respective VDDA1P8V_USB terminal may be connected to any 1.8-V power supply and the respective VDDA3P3V_USB terminal may be connected to any 3.3-V power supply. If the system does not have a 3.3-V power supply, the VDDA3P3V_USB terminal may be connected to ground.
D. If the system uses mDDR or DDR2 memory devices, VDDS_DDR can be ramped simultaneously with the other 1.8-V I/O power supplies.
E. VDDS_RTC can be ramped independent of other power supplies if PMIC_POWER_EN functionality is not required. If VDDS_RTC is ramped after VDD_CORE, there might be a small amount of additional leakage current on VDD_CORE. The power sequence shown provides the lowest leakage option.
F. To configure VDDSHVx [1-6] as 1.8 V, power up the respective VDDSHVx [1-6] to 1.8 V following the recommended sequence. To configure VDDSHVx [1-6] as 3.3 V, power up the respective VDDSHVx [1-6] to 3.3 V following the recommended sequence.
G. If all the 1.8-V supplies are not sourced from the same power supply, it is required to power up VDDS before other 1.8-V supplies. Further, it is also recommended to source VDDS and VDDSHvx [x = 1-6] when configured as 1.8V from the same power supply.
Figure 6-2 Preferred Power-Supply Sequencing With Dual-Voltage I/Os Configured as 3.3 V
AM3358-EP power_sequence_alt_dual_3_3.gif
A. RTC_PWRONRSTn should be asserted for at least 1 ms to provide enough time for the internal RTC LDO output to reach a valid level before RTC reset is released.
B. The 3.3-V I/O power supplies may be ramped simultaneously with the 1.8-V I/O power supplies if the voltage sourced by any 3.3-V power supplies does not exceed the voltage sourced by any 1.8-V power supply by more than 2 V. Serious reliability issues may occur if the system power supply design allows any 3.3-V I/O power supplies to exceed any 1.8-V I/O power supplies by more than 2 V.
C. When using the GCZ package option, VDD_MPU and VDD_CORE power inputs may be powered from the same source if the application only uses operating performance points (OPPs) that define a common power supply voltage for VDD_MPU and VDD_CORE.
D. If a USB port is not used, the respective VDDA1P8V_USB terminal may be connected to any 1.8-V power supply and the respective VDDA3P3V_USB terminal may be connected to any 3.3-V power supply. If the system does not have a 3.3-V power supply, the VDDA3P3V_USB terminal may be connected to ground.
E. If the system uses mDDR or DDR2 memory devices, VDDS_DDR can be ramped simultaneously with the other 1.8-V I/O power supplies.
F. VDDS_RTC can be ramped independent of other power supplies if PMIC_POWER_EN functionality is not required. If VDDS_RTC is ramped after VDD_CORE, there might be a small amount of additional leakage current on VDD_CORE. The power sequence shown provides the lowest leakage option.
G. To configure VDDSHVx [1-6] as 1.8 V, power up the respective VDDSHVx [1-6] to 1.8 V following the recommended sequence. To configure VDDSHVx [1-6] as 3.3 V, power up the respective VDDSHVx [1-6] to 3.3 V following the recommended sequence.
H. If all the 1.8-V supplies are not sourced from the same power supply, it is required to power up VDDS before other 1.8-V supplies. Further, it is also recommended to source VDDS and VDDSHvx [x = 1-6] when configured as 1.8V from the same power supply.
Figure 6-3 Alternate Power-Supply Sequencing With Dual-Voltage I/Os Configured as 3.3 V
AM3358-EP power_sequence_dual_1_8.gif
A. RTC_PWRONRSTn should be asserted for at least 1 ms to provide enough time for the internal RTC LDO output to reach a valid level before RTC reset is released.
B. When using the GCZ package option, VDD_MPU and VDD_CORE power inputs may be powered from the same source if the application only uses operating performance points (OPPs) that define a common power supply voltage for VDD_MPU and VDD_CORE.
C. If a USB port is not used, the respective VDDA1P8V_USB terminal may be connected to any 1.8-V power supply and the respective VDDA3P3V_USB terminal may be connected to any 3.3-V power supply. If the system does not have a 3.3-V power supply, the VDDA3P3V_USB terminal may be connected to ground.
D. If the system uses mDDR or DDR2 memory devices, VDDS_DDR can be ramped simultaneously with the other 1.8-V I/O power supplies.
E. VDDS_RTC can be ramped independent of other power supplies if PMIC_POWER_EN functionality is not required. If VDDS_RTC is ramped after VDD_CORE, there might be a small amount of additional leakage current on VDD_CORE. The power sequence shown provides the lowest leakage option.
F. To configure VDDSHVx [1-6] as 1.8 V, power up the respective VDDSHVx [1-6] to 1.8 V following the recommended sequence. To configure VDDSHVx [1-6] as 3.3 V, power up the respective VDDSHVx [1-6] to 3.3 V following the recommended sequence.
G. If all the 1.8-V supplies are not sourced from the same power supply, it is required to power up VDDS before other 1.8-V supplies. Further, it is also recommended to source VDDS and VDDSHvx [x = 1-6] when configured as 1.8V from the same power supply.
Figure 6-4 Power-Supply Sequencing With Dual-Voltage I/Os Configured as 1.8 V
AM3358-EP power_sequence_rtc_ldo_disabled.gif
A. RTC_PWRONRSTn should be asserted for at least 1 ms to provide enough time for the internal RTC LDO output to reach a valid level before RTC reset is released.
B. The CAP_VDD_RTC terminal operates as an input to the RTC core voltage domain when the internal RTC LDO is disabled by connecting the RTC_KALDO_ENn terminal to VDDS_RTC. If the internal RTC LDO is disabled, CAP_VDD_RTC should be sourced from an external 1.1-V power supply.
C. When using the GCZ package option, VDD_MPU and VDD_CORE power inputs may be powered from the same source if the application only uses operating performance points (OPPs) that define a common power supply voltage for VDD_MPU and VDD_CORE.
D. If a USB port is not used, the respective VDDA1P8V_USB terminal may be connected to any 1.8-V power supply and the respective VDDA3P3V_USB terminal may be connected to any 3.3-V power supply. If the system does not have a 3.3-V power supply, the VDDA3P3V_USB terminal may be connected to ground.
E. If the system uses mDDR or DDR2 memory devices, VDDS_DDR can be ramped simultaneously with the other 1.8-V I/O power supplies.
F. VDDS_RTC should be ramped at the same time or before CAP_VDD_RTC, but these power inputs can be ramped independent of other power supplies if PMIC_POWER_EN functionality is not required. If CAP_VDD_RTC is ramped after VDD_CORE, there might be a small amount of additional leakage current on VDD_CORE. The power sequence shown provides the lowest leakage option.
G. To configure VDDSHVx [1-6] as 1.8 V, power up the respective VDDSHVx [1-6] to 1.8 V following the recommended sequence. To configure VDDSHVx [1-6] as 3.3 V, power up the respective VDDSHVx [1-6] to 3.3 V following the recommended sequence.
H. If all the 1.8-V supplies are not sourced from the same power supply, it is required to power up VDDS before other 1.8-V supplies. Further, it is also recommended to source VDDS and VDDSHvx [x = 1-6] when configured as 1.8V from the same power supply.
Figure 6-5 Power-Supply Sequencing With Internal RTC LDO Disabled
AM3358-EP power_sequence_rtc_disabled.gif
A. CAP_VDD_RTC terminal operates as an input to the RTC core voltage domain when the internal RTC LDO is disabled by connecting the RTC_KALDO_ENn terminal to VDDS_RTC. If the internal RTC LDO is disabled, CAP_VDD_RTC should be sourced from an external 1.1-V power supply. The PMIC_POWER_EN output cannot be used when the RTC is disabled.
B. When using the GCZ package option, VDD_MPU and VDD_CORE power inputs may be powered from the same source if the application only uses operating performance points (OPPs) that define a common power supply voltage for VDD_MPU and VDD_CORE.
C. If a USB port is not used, the respective VDDA1P8V_USB terminal may be connected to any 1.8-V power supply and the respective VDDA3P3V_USB terminal may be connected to any 3.3-V power supply. If the system does not have a 3.3-V power supply, the VDDA3P3V_USB terminal may be connected to ground.
D. If the system uses mDDR or DDR2 memory devices, VDDS_DDR can be ramped simultaneously with the other 1.8-V I/O power supplies.
E. VDDS_RTC should be ramped at the same time or before CAP_VDD_RTC, but these power inputs can be ramped independent of other power supplies if PMIC_POWER_EN functionality is not required. If CAP_VDD_RTC is ramped after VDD_CORE, there might be a small amount of additional leakage current on VDD_CORE. The power sequence shown provides the lowest leakage option.
F. To configure VDDSHVx [1-6] as 1.8 V, power up the respective VDDSHVx [1-6] to 1.8 V following the recommended sequence. To configure VDDSHVx [1-6] as 3.3 V, power up the respective VDDSHVx [1-6] to 3.3 V following the recommended sequence.
G. If all the 1.8-V supplies are not sourced from the same power supply, it is required to power up VDDS before other 1.8-V supplies. Further, it is also recommended to source VDDS and VDDSHvx [x = 1-6] when configured as 1.8V from the same power supply.
Figure 6-6 Power-Supply Sequencing With RTC Feature Disabled
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