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      參數(shù)資料
      型號(hào): TMP320R2812GHHQ
      廠商: Texas Instruments, Inc.
      元件分類: 數(shù)字信號(hào)處理
      英文描述: TMS320R2811, TMS320R2812 Digital Signal Processors
      中文描述: TMS320R2811,TMS320R2812數(shù)字信號(hào)處理器
      文件頁數(shù): 38/147頁
      文件大?。?/td> 2021K
      代理商: TMP320R2812GHHQ
      Functional Overview
      38
      June 2004
      SPRS257
      3.5
      External Interface, XINTF (2812 Only)
      This section gives a top-level view of the external interface (XINTF) that is implemented on the 2812 devices.
      The external interface is a non-multiplexed asynchronous bus, similar to the C240x external interface. The
      external interface on the 2812 is mapped into five fixed zones shown in Figure 3
      4.
      Figure 3
      4 shows the 2812 XINTF signals.
      XD(15:0)
      XA(18:0)
      XZCS6
      XZCS7
      XZCS6AND7
      XZCS2
      XWE
      XRD
      XR/W
      XREADY
      XMP/MC
      XHOLD
      XHOLDA
      XCLKOUT (see Note E)
      XINTF Zone 0
      (8K
      ×
      16)
      XINTF Zone 1
      (8K
      ×
      16)
      XINTF Zone 6
      (512K
      ×
      16)
      XINTF Zone 7
      (16K
      ×
      16)
      (mapped here if MP/MC = 1)
      0x40 0000
      0x3F C000
      0x18 0000
      0x10 0000
      0x00 6000
      0x00 4000
      0x00 2000
      0x00 0000
      Data Space
      Prog Space
      XINTF Zone 2
      (512K
      ×
      16)
      0x08 0000
      NOTES: A. The mapping of XINTF Zone 7 is dependent on the XMP/MC device input signal and the MP/MC mode bit (bit 8 of XINTCNF2
      register). Zones 0, 1, 2, and 6 are always enabled.
      B. Each zone can be programmed with different wait states, setup and hold timing, and is supported by zone chip selects
      (XZCS0AND1, XZCS2, XZCS6AND7), which toggle when an access to a particular zone is performed. These features enable
      glueless connection to many external memories and peripherals.
      C. The chip selects for Zone 0 and 1 are ANDed internally together to form one chip select (XZCS0AND1). Any external memory
      that is connected to XZCS0AND1 is dually mapped to both Zones 0 and Zone 1.
      D. The chip selects for Zone 6 and 7 are ANDed internally together to form one chip select (XZCS6AND7). Any external memory
      that is connected to XZCS6AND7 is dually mapped to both Zones 6 and Zone 7. This means that if Zone 7 is disabled (via the
      MP/MC mode) then any external memory is still accessible via Zone 6 address space.
      E. XCLKOUT is also pinned out on the 2810 and 2811.
      XZCS0AND1
      XZCS0
      XZCS1
      Figure 3
      4. External Interface Block Diagram
      A
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