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  • 參數(shù)資料
    型號: MQ83C154DXXX-20/883R
    廠商: TEMIC SEMICONDUCTORS
    元件分類: 微控制器/微處理器
    英文描述: 8-BIT, MROM, 20 MHz, MICROCONTROLLER, CQFP44
    文件頁數(shù): 72/80頁
    文件大小: 5152K
    代理商: MQ83C154DXXX-20/883R
    272
    XMEGA A [MANUAL]
    8077I–AVR–11/2012
    24.9
    Register Description EBI
    24.9.1 CTRL – Control register
    Bit 7:6 – SDDATAW[1:0]: SDRAM Data Width Setting
    These bits select the EBI SDRAM data width configuration, according to Table 24-7 on page 272.
    Table 24-7. SDRAM mode.
    Note:
    1.
    Eight-bit data bus only available for four-port EBI interface
    Bit 5:4 – LPCMODE[1:0]: SRAM Low Pin Count Mode
    These bits select the EBI SRAM LPC configuration according to Table 24-8 on page 272.
    Table 24-8. SRAM LPC mode.
    Bit 3:2 – SRMODE[1:0]: SRAM Mode
    These bits selects the EBI SRAM configuration according to Table 24-9 on page 272.
    Table 24-9. SRAM mode.
    Note:
    1.
    ALE2 and NOALE only available with 4-port EBI interface
    Bit 1:0 – IFMODE[1:0]: Interface Mode
    Bit
    7
    654
    321
    0
    +0x00
    SDDATAW[1:0]
    LPCMODE[1:0]
    SRMODE[1:0]
    IFMODE[1:0]
    Read/Write
    R/W
    Initial Value
    0
    SDDATAW[1:0]
    Group Configuration
    Description
    00
    4BIT
    Four-bit data bus
    01
    Reserved
    10
    Reserved
    11
    Reserved
    LPCMODE[1:0]
    Group Configuration
    ALE
    Description
    00
    ALE1
    Data multiplexed with Address byte 0
    01
    Reserved
    10
    ALE1 & 2
    Data multiplexed with Address byte 0 and 1
    ALE12
    11
    Reserved
    SRMODE[1:0]
    Group Configuration
    ALE
    Description
    00
    ALE1
    Address byte 0 and 1 multiplexed
    01
    ALE2(1)
    ALE2
    Address byte 0 and 2 multiplexed
    10
    ALE1 & 2
    Address byte 0, 1 and 2 multiplexed
    11
    NOALE
    No ALE
    No address multiplexing
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