Analog Devices ADSP-2181 manuals

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Analog Devices ADSP-2181 Manual

40 pages390.22 Kb

a
- DSP Microcomputers ADSP-2181/ADSP-2183
  - 3ADSP-2181/ADSP-2183
    - 21xx CORE
    - ADSP-2181/ADSP-2183 INTEGRATION
    - 4Data, Byte, & I/O Spaces
  - 8ADSP-2181/ADSP-2183
    - 11
- 12ADSP-2181SPECIFICATIONS
  - RECOMMENDED OPERATING CONDITIONS
  - ELECTRICAL CHARACTERISTICS
    - WARNING!
  - 13ADSP-2181 TIMING PARAMETERS
    - 15t
    - =t
    - t
- 16ADSP-2183SPECIFICATIONS
  - RECOMMENDED OPERATING CONDITIONS
  - ELECTRICAL CHARACTERISTICS
    - WARNING!
  - 17ADSP-2183 TIMING PARAMETERS
  - 18ADSP-2181/ADSP-2183
    - REV. 0 18
    - (C V
      - CK
      - DD
      - JC
      - JA
      - JC
      - JA
      - CASE
      - AMB
      - Figure 16. Power vs. Frequency
        MODES
        n
        POWER, IDLE
        POWER, IDLE
        POWER, INTERNAL
    - f) is calculated for each output:
      - # of Pins C V
      - f Address, DMS 8 10 pF 3.3
      - V 33.3 MHz = 29.0 mW Data Output, WR 9 10 pF 3.3
      - V 16.67 MHz = 16.3 mW RD 1 10 pF 3.3
      - V 16.67 MHz = 1.8 mW CLKOUT 1 10 pF 3.3
      - V 33.3 MHz = 3.6 mW 50.7 mW
    - Total power dissipation for this example is P
    - + 50.7 mW.
      - n
    - ADSP-2183
      - ENVIRONMENTAL CONDITIONS
      - Ambient Temperature Rating: T
      - = T
      - (PD
      - ) T
      - = Case Temperature in C PD = Power Dissipation in W
      - = Thermal Resistance (Case-to-Ambient)
      - = Thermal Resistance (Junction-to-Ambient)
      - = Thermal Resistance (Junction-to-Case) Package
      - TQFP 50C/W 2C/W 48C/W PQFP 41C/W 10C/W 31C/W
        Figure 15. Power-Down Supply Current (Typical)
        POWER DISSIPATION
      - f C = load capacitance, f= output switching frequency.
        Example:
      - External data memory is accessed every cycle with 50% of the address pins switching.
      - External data memory writes occur every other cycle with 50% of the data pins switching.
      - Each address and data pin has a 10 pF total load at the pin.
      - The application operates at V
      - = 3.3 V and t
      - = 34.7 ns. Total Power Dissipation = P
      - + (C V
      - f) P
      - = internal power dissipation from Power vs. Frequency graph (Figure 16).
      - 19t
      - =C
      - 0.5V i
  - 21ADSP-2181/ADSP-2183
    - ADSP-2181
    - ADSP-2183
      - 31REV. 0 31
        128-Lead TQFP Package Pinout
      - 34REV. 0 34
        128-Lead PQFP Package Pinout
        128L PQFP (28mm x 28mm)
      - 36D

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