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    參數(shù)資料
    型號: PSD835F2-A-20MI
    廠商: 意法半導(dǎo)體
    英文描述: Configurable Memory System on a Chip for 8-Bit Microcontrollers
    中文描述: 在8片位微控制器可配置存儲系統(tǒng)
    文件頁數(shù): 44/110頁
    文件大?。?/td> 570K
    代理商: PSD835F2-A-20MI
    PSD835G2
    PSD8XX Family
    43
    The
    PSD835G2
    Functional
    Blocks
    (cont.)
    9.3 Microcontroller Bus Interface
    The
    no-glue logic
    PSD835G2 Microcontroller Bus Interface can be directly connected to
    most popular microcontrollers and their control signals. Key 8-bit microcontrollers with their
    bus types and control signals are shown in Table 14. The MCU interface type is
    specified using the PSDsoft.
    9.3.1. PSD835G2 Interface to a Multiplexed Bus
    Figure 17 shows an example of a system using a microcontroller with a 8-bit multiplexed
    bus and a PSD835G2. The ADIO port on the PSD835G2 is connected directly to the
    microcontroller address/data bus. ALE latches the address lines internally. Latched
    addresses can be brought out to Port E, F or G. The PSD835G2 drives the ADIO data bus
    only when one of its internal resources is accessed and the RD input is active. Should the
    system address bus exceed sixteen bits, Ports A, B, C, or F may be used as additional
    address inputs.
    9.3.2. PSD835G2 Interface to a Non-Multiplexed Bus
    Figure 18 shows an example of a system using a microcontroller with a 8-bit
    non-multiplexed bus and a PSD835G2. The address bus is connected to the ADIO Port,
    and the data bus is connected to Port F. Port F is in tri-state mode when the PSD835G2
    is not accessed by the microcontroller. Should the system address bus exceed sixteen
    bits, Ports A, B or C may be used for additional address inputs.
    Data
    Bus
    Width
    MCU
    CNTL0
    CNTL1
    CNTL2
    PC7
    *
    *
    *
    *
    *
    *
    *
    DBE
    *
    *
    *
    *
    PD0**
    ADIO0
    PF3-PF0 PF7-PF4
    *
    A3-A0
    *
    *
    *
    *
    *
    *
    D3-D0
    *
    *
    D3-D0
    8031/8051
    80C51XA
    80C251
    80C251
    80198
    68HC11
    68HC05C0
    68HC912
    Z80
    Z8
    68330
    M37702M2
    8
    8
    8
    8
    8
    8
    8
    8
    8
    8
    8
    8
    WR
    WR
    WR
    WR
    WR
    R/W
    WR
    R/W
    WR
    R/W
    R/W
    R/W
    RD
    RD
    PSEN
    RD
    RD
    E
    RD
    E
    RD
    DS
    DS
    E
    PSEN
    PSEN
    *
    PSEN
    *
    *
    *
    *
    *
    *
    *
    *
    ALE
    ALE
    ALE
    ALE
    ALE
    AS
    AS
    AS
    *
    AS
    AS
    ALE
    A0
    A4
    A0
    A0
    A0
    A0
    A0
    A0
    A0
    A0
    A0
    A0
    *
    *
    *
    *
    *
    *
    *
    *
    D7-D4
    *
    *
    D7-D4
    Table 14. Microcontrollers and their Control Signals
    *
    *
    Unused CNTL2 pin can be configured as PLD input. Other unused pins (PD3-0, PA3-0) can be
    **
    configured for other I/O functions.
    **
    ALE/AS input is optional for microcontrollers with a non-multiplexed bus
    相關(guān)PDF資料
    PDF描述
    PSD835F2-A-20U Configurable Memory System on a Chip for 8-Bit Microcontrollers
    PSD835F2-A-20UI Configurable Memory System on a Chip for 8-Bit Microcontrollers
    PSD835F2-A-70B81 Configurable Memory System on a Chip for 8-Bit Microcontrollers
    PSD835F2-A-70B81I Configurable Memory System on a Chip for 8-Bit Microcontrollers
    PSD835F2-A-70J Configurable Memory System on a Chip for 8-Bit Microcontrollers
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