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DM504 Datasheet(PDF) 136 Page - Texas Instruments |
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DM504 Datasheet(HTML) 136 Page - Texas Instruments |
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136 / 211 page ![]() mmc_clk mmc_cmd mmc_dat[3:0] SDR251 SDR252L SDR252H SDR255 SDR256 SDR255 SDR256 SPRS91v_MMC_08 mmc_clk mmc_cmd mmc_dat[3:0] SDR254 SDR258 SDR253 SDR257 SDR251 SDR252H SDR252L SPRS91v_MMC_07 136 DM504 SPRS977A – NOVEMBER 2016 – REVISED JANUARY 2017 www.ti.com Submit Documentation Feedback Specifications Copyright © 2016–2017, Texas Instruments Incorporated (1) i in [i:0] = 3 Table 5-69. Switching Characteristics for MMC - SDR25 Mode (2) NO. PARAMETER DESCRIPTION MIN MAX UNIT SDR251 fop(clk) Operating frequency, mmc_clk 48 MHz SDR252 H tw(clkH) Pulse duration, mmc_clk high 0.5*P- 0.270 ns SDR252L tw(clkL) Pulse duration, mmc_clk low 0.5*P- 0.270 ns SDR255 td(clkL-cmdV) Delay time, mmc_clk falling clock edge to mmc_cmd transition -8.8 6.6 ns SDR256 td(clkL-dV) Delay time, mmc_clk falling clock edge to mmc_dat[i:0] transition -8.8 6.6 ns (1) P = output mmc_clk period in ns (2) i in [i:0] = 3 Figure 5-39. MMC/SD/SDIOj in - SDR25 - Receiver Mode Figure 5-40. .MMC/SD/SDIOj in - SDR25 - Transmiter Mode CAUTION The IO timings provided in this section are only valid if signals within a single IOSET are used. The IOSETs are defined in Table 5-70. In Table 5-70 are presented the specific groupings of signals (IOSET) for use with MMC. Table 5-70. MMC IOSETs SIGNALS IOSET1 IOSET2 IOSET3 BALL MUX BALL MUX BALL MUX mmc_clk C12 5 R13 5 A12 5 mmc_cmd D12 5 R12 5 B12 5 mmc_dat0 C10 5 U11 5 A14 5 mmc_dat1 D11 5 P12 5 B15 5 |
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