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MPC821 датащи(PDF) 88 Page - NXP Semiconductors |
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MPC821 датащи(HTML) 88 Page - NXP Semiconductors |
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88 / 242 page ![]() Support Information MPC8XXFADS Design Specification—Rev 0.1 PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE equations Cstr.clk = DbgClk; "* Cstr.ar = Reset; when (SELECT_CHANGE_ALLOWED) then Cstr := DbgClkDivSel.fb; else Cstr := Cstr.fb; "****************************************************************************** "* Clock selector. "* Controlled by the CSTR. "****************************************************************************** equations DbgClkOut.oe = 1; when (DEBUG_CLOCK_DIV_BY_1) then DbgClkOut = DbgClk; else when (DEBUG_CLOCK_DIV_BY_2) then DbgClkOut = DbgClkDivBy2.fb; else when (DEBUG_CLOCK_DIV_BY_4) then DbgClkOut = DbgClkDivBy4.fb; else when (DEBUG_CLOCK_DIV_BY_8) then DbgClkOut = DbgClkDivBy8.fb; "****************************************************************************** "* Clk2. "* IClk divided by 2 . "****************************************************************************** equations Clk2.clk = IClk; ClkOut.oe = 3; ClkOut.ar = Reset; Clk2 := !Clk2 & HOST_IS_ON; "divide by 2 "****************************************************************************** "* Bundle delay timer. This timer ensures data validity in the following casses: "* 1) Host write to adi. In that case AdsAck is ASSERTED only after that timer "* expired. Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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