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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TMS320C6711 датащи(PDF) 75 Page - Texas Instruments |
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TMS320C6711 датащи(HTML) 75 Page - Texas Instruments |
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75 / 129 page  TMS320C6711, TMS320C6711B, TMS320C6711C, TMS320C6711D FLOATING-POINT DIGITAL SIGNAL PROCESSORS SPRS088L − FEBRUARY 1999 − REVISED MAY 2004 75 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 ASYNCHRONOUS MEMORY TIMING timing requirements for asynchronous memory cycles†‡§ (see Figure 30−Figure 31) [C6711] NO C6711−100 C6711−150 UNIT NO. MIN MAX MIN MAX UNIT 3 tsu(EDV-AREH) Setup time, EDx valid before ARE high 13 9 ns 4 th(AREH-EDV) Hold time, EDx valid after ARE high 1 1 ns 6 tsu(ARDY-EKOH) Setup time, ARDY valid before ECLKOUT high 6 3 ns 7 th(EKOH-ARDY) Hold time, ARDY valid after ECLKOUT high 1.7 1.7 ns timing requirements for asynchronous memory cycles†‡§ (see Figure 30−Figure 31) [C6711B] NO. C6711B-100 C6711BGFNA−100 C6711B−150 UNIT NO. MIN MAX MIN MAX UNIT 3 tsu(EDV-AREH) Setup time, EDx valid before ARE high 13 9 ns 4 th(AREH-EDV) Hold time, EDx valid after ARE high 1 1 ns 6 tsu(ARDY-EKOH) Setup time, ARDY valid before ECLKOUT high 6 3 ns 7 th(EKOH-ARDY) Hold time, ARDY valid after ECLKOUT high 2.5 2.5 ns timing requirements for asynchronous memory cycles†‡§ (see Figure 30−Figure 31) [11C/11D] NO. GDPA-167 −200 −250 (6711D) UNIT MIN MAX 3 tsu(EDV-AREH) Setup time, EDx valid before ARE high 6.5 ns 4 th(AREH-EDV) Hold time, EDx valid after ARE high 1 ns 6 tsu(ARDY-EKOH) Setup time, ARDY valid before ECLKOUT high 3 ns 7 th(EKOH-ARDY) Hold time, ARDY valid after ECLKOUT high 2.3 ns † To ensure data setup time, simply program the strobe width wide enough. ARDY is internally synchronized. The ARDY signal is recognized in the cycle for which the setup and hold time is met. To use ARDY as an asynchronous input, the pulse width of the ARDY signal should be wide enough (e.g., pulse width = 2E) to ensure setup and hold time is met. ‡ RS = Read setup, RST = Read strobe, RH = Read hold, WS = Write setup, WST = Write strobe, WH = Write hold. These parameters are programmed via the EMIF CE space control registers. § E = ECLKOUT period in ns |
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