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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TMS320VC549 датащи(PDF) 92 Page - Texas Instruments |
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TMS320VC549 датащи(HTML) 92 Page - Texas Instruments |
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92 / 111 page  TMS320C54x, TMS320LC54x, TMS320VC54x FIXED-POINT DIGITAL SIGNAL PROCESSORS SPRS039C – FEBRUARY 1996 – REVISED DECEMBER 1999 92 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443 serial port transmit timing (continued) switching characteristics over recommended operating conditions for serial port transmit with internal clocks and frames [H = 0.5tc(CO)] (see Figure 34) PARAMETER ’C54x-40 ’LC54x-40 ’LC54x-50 ’54x-66 UNIT MIN TYP MAX MIN TYP MAX tc(SCK) Cycle time, serial port clock 8H 8H ns td(FSX) Delay time, CLKX rising to FSX 15 15 ns td(DX) Delay time, CLKX rising to DX 15 15 ns tdis(DX) Disable time, CLKX rising to DX 20 20 ns th(DX) Hold time, DX valid after CLKX rising edge –5 –5 ns tf(SCK) Fall time, serial port clock 4 4 ns tr(SCK) Rise time, serial port clock 4 4 ns tw(SCK) Pulse duration, serial port clock low/high 4H – 8 4H – 8 ns DX FSX CLKX 8/16 7/15 2 1 th(DX) tw(SCK) tc(SCK) td(FSX) td(FSX) td(DX) tdis(DX) tw(SCK) tr(SCK) tf(SCK) Figure 34. Serial Port Transmit Timing With Internal Clocks and Frames |
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