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TMP320C2811PBKA 데이터시트(PDF) 120 Page - Texas Instruments |
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TMP320C2811PBKA 데이터시트(HTML) 120 Page - Texas Instruments |
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120 / 147 page ![]() Electrical Specifications 120 June 2004 SPRS257 Lead Active Trail DIN td(XCOH-XZCSL) td(XCOH-XA) td(XCOHL-XRDL) td(XCOHL-XZCSH) td(XCOHL-XRDH) WS (Asynch) XCLKOUT=XTIMCLK XCLKOUT=1/2 XTIMCLK XZCS0AND1, XZCS2, XZCS6AND7 XA[0:18] XRD XWE XR/W XD[0:15] XREADY(Asynch) NOTES: A. All XINTF accesses (lead period) begin on the rising edge of XCLKOUT. When necessary, the device will insert an alignment cycle before an access to meet this requirement. B. During alignment cycles, all signals will transition to their inactive state. C. During inactive cycles, the XINTF address bus will always hold the last address put out on the bus. This includes alignment cycles. D. For each sample, setup time from the beginning of the access can be calculated as: D = (XRDLEAD + XRDACTIVE −3 +n) tc(XTIM) − tsu(XRDYasynchL)XCOHL where n is the sample number: n = 1, 2, 3, and so forth. E. Reference for the first sample is with respect to this point: E = (XRDLEAD + XRDACTIVE −2) tc(XTIM) tsu(XRDYasynchL)XCOHL tsu(XD)XRD ta(XRD) ta(A) th(XRDYasynchL) th(XD)XRD th(XRDYasynchH)XZCSH = Don’t care. Signal can be high or low during this time. Legend: See Notes A and B See Note C tsu(XRDYasynchH)XCOHL See Note D See Note E te(XRDYasynchH) Figure 6−29. Example Read With Asynchronous XREADY Access XTIMING register parameters used for this example: XRDLEAD XRDACTIVE XRDTRAIL USEREADY X2TIMING XWRLEAD XWRACTIVE XWRTRAIL READYMODE ≥1 3 ≥1 1 0 N/A† N/A† N/A† 1 = XREADY (Asynch) † N/A = “Don’t care” for this example |
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