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    • EIM-Bus (Trizeps VII)

    Owned by Albinleo Velappan (Deactivated)
    Last updated: 05. Apr 2023 by Anu Selvaraj (Deactivated)
    2 min read

    This describes the registry-settings which can be made for the address-/databus of the i.MX6 Trizeps VII -module.

    Registry Keys

    [HKEY_LOCAL_MACHINE\Drivers\BuiltIn\OEM]

    [HKEY_LOCAL_MACHINE\Drivers\BuiltIn\OEM]

    Key

    Type

    Description

    DataPins

    DWORD

    Set which datapins to use. 0xFFFF for all 16 pins. Bit 0x1 = D0, Bit 0x2 = D1, Bit 0x4 = D2, …

    DataPad

    DWORD

    Set IOMUXC_SW_PAD_CTL_PAD_xxx-registers of all used datapins to this value. This controls the physical pad-setting.

    AddressPins

    DWORD

    Set which addresspins to use. 0x3ffffff for all address-pins. Bit 0x1 = A0, Bit 0x2 = A1, Bit 0x4 = A2, …

    AddressPad

    DWORD

    Set IOMUXC_SW_PAD_CTL_PAD_xxx-registers of all used address-pins to this value. This controls the physical pad-settings.

    BusCtrlPins

    DWORD

    Each bit corresponds to a address/databus-controlpin. 0x001 nWE 0x002 nOE 0x004 nCS0 (nCS3 on SODIMM) 0x008 nCS1 (nCS1,nCS4 on SODIMM) 0x010 nBE0 0x020 nBE1 0x040 nBE2 0x080 nBE3 0x100 nWAIT/nRDY

    BusCtrlPad

    DWORD

    Set IOMUXC_SW_PAD_CTL_PAD_xxx-registers of all used control-pins to this value. This controls the physical pad-settings.

    CS0GCR1

    DWORD

    Set Chip Select 0 General Configuration Register 1 (EIM_CS0GCR1)

    CS0GCR2

    DWORD

    Set Chip Select 0 General Configuration Register 2 (EIM_CS0GCR2)

    CS0RD1

    DWORD

    Set Chip Select 0 Read Configuration Register 1 (EIM_CS0RCR1)

    CS0RD2

    DWORD

    Set Chip Select 0 Read Configuration Register 2 (EIM_CS0RCR2)

    CS0WR1

    DWORD

    Set Chip Select 0 Write Configuration Register 1 (EIM_CS0WCR1)

    CS0WR2

    DWORD

    Set Chip Select 0 Write Configuration Register 1 (EIM_CS0WCR2)

    See Chapter 22: External Interface Module (EIM) of the i.MX6 Reference Manual for details.

    The i.MX6 Chip Select 0 is connected to nCS3 (SODIMM-Pin 107).
    The i.MX6 Chip Select 1 is connected to a decoder which generates nCS1 (SODIMM-Pin 105) and nCS4 (SODIMM-Pin 106) depending on the level of A25. If A25 = 0, than nCS1 is selected, otherwise nCS4.

    D[15..0] are connected to EIM_D[31..16].

    Please note that you have several configuration option which may lead to address shifts or might not enable you to use nCS4. In the standard-configuration A0 is typically not used, because the bus is configured to use 16bit access.

    Download Sample Register for AddressPad Setting: imx6sdlrm-adresspad.pdf

    See Also