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AM3892 Datasheet(PDF) 267 Page - Texas Instruments |
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AM3892 Datasheet(HTML) 267 Page - Texas Instruments |
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267 / 299 page  START XMIT Valid Valid Valid END 7 SD_CLK SD_CMD 13 10 9 13 13 13 START XMIT Valid Valid Valid END 7 SD_CLK SD_CMD 10 9 1 2 AM3894 AM3892 www.ti.com SPRS681A – OCTOBER 2010 – REVISED MARCH 2011 Table 8-90. SD/SDIO Registers (continued) HEX ADDRESS ACRONYM REGISTER NAME 0x4806 0250 SD_FE Force Event 0x4806 0254 SD_ADMAES ADMA Error Status 0x4806 0258 SD_ADMASAL ADMA System address Low bits 0x4806 025C SD_ADMASAH ADMA System address High bits 0x4806 02FC SD_REV Versions 8.16.2 SD/SDIO Electrical Data/Timing Table 8-91. Timing Requirements for SD/SDIO (see Figure 8-80, Figure 8-82) NO. MIN MAX UNIT 1 tsu(CMDV-CLKH) Setup time, SD_CMD valid before SD_CLK rising clock edge 4.1 ns 2 th(CLKH-CMDV) Hold time, SD_CMD valid after SD_CLK rising clock edge 1.9 ns 3 tsu(DATV-CLKH) Setup time, SD_DATx valid before SD_CLK rising clock edge 4.1 ns 4 th(CLKH-DATV) Hold time, SD_DATx valid after SD_CLK rising clock edge 1.9 ns Table 8-92. Switching Characteristics Over Recommended Operating Conditions for SD/SDIO (see Figure 8-79, Figure 8-80, Figure 8-81, Figure 8-82) NO. PARAMETER MIN MAX UNIT fop(CLK) Operating frequency, SD_CLK 48 MHz 7 tc(CLK) Operating period: SD_CLK 20.8 ns fop(CLKID) Identification mode frequency, SD_CLK 400 kHz 8 tc(CLKID) Identification mode period: SD_CLK 2500.0 ns 9 tw(CLKL) Pulse duration, SD_CLK low 0.5*P(1) ns 10 tw(CLKH) Pulse duration, SD_CLK high 0.5*P(1) ns 11 tr(CLK) Rise time, All Signals (10% to 90%) 2.2 ns 12 tf(CLK) Fall time, All Signals (10% to 90%) 2.2 ns 13 td(CLKL-CMD) Delay time, SD_CLK rising clock edge to SD_CMD transition 2.5 13.9 ns 14 td(CLKL-DAT) Delay time, SD_CLK rising clock edge to SD_DATx transition 2.5 13.9 ns (1) P = SD_CLK period. Figure 8-79. SD Host Command Timing Figure 8-80. SD Card Response Timing Copyright © 2010–2011, Texas Instruments Incorporated Peripheral Information and Timings 267 Submit Documentation Feedback Product Folder Link(s): AM3894 AM3892 |
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