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DM505 Datasheet(PDF) 174 Page - Texas Instruments |
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DM505 Datasheet(HTML) 174 Page - Texas Instruments |
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174 / 295 page  SDR122 SDR121 SDR120 SDR123 SDR124 mmc_clk mmc_cmd mmc_dat[3:0] SPRS91v_MMC_06 SDR122 SDR121 SDR120 SDR126 SDR125 SDR128 SDR127 mmc_clk mmc_cmd mmc_dat[3:0] SPRS91v_MMC_05 174 DM505 SPRS976E – NOVEMBER 2016 – REVISED MAY 2018 www.ti.com Submit Documentation Feedback Specifications Copyright © 2016–2018, Texas Instruments Incorporated (1) i in [i:0] = 3 Table 5-74. Switching Characteristics for MMC - SDR12 Mode NO. PARAMETER DESCRIPTION MIN MAX UNIT SDR120 fop(clk) Operating frequency, mmc_clk 24 MHz SDR121 tw(clkH) Pulse duration, mmc_clk high 0.5×P- 0.270 ns SDR122 tw(clkL) Pulse duration, mmc_clk low 0.5×P- 0.270 ns SDR123 td(clkL-cmdV) Delay time, mmc_clk falling clock edge to mmc_cmd transition -19.13 16.93 ns SDR124 td(clkL-dV) Delay time, mmc_clk falling clock edge to mmc_dat[i:0] transition -19.13 16.93 ns (1) P = output mmc_clk period in ns (2) i in [i:0] = 3 Figure 5-58. MMC/SD/SDIOj in - SDR12 - Receiver Mode Figure 5-59. MMC/SD/SDIOj in - SDR12 - Transmiter Mode 5.9.6.15.4 MMC, SD SDR25 Mode Figure 5-60, Figure 5-61, Table 5-75, and Table 5-76 present Timing requirements and Switching characteristics for MMC - SD and SDIO SDR25 in receiver and transmiter mode. Table 5-75. Timing Requirements for MMC - SDR25 Mode (1) NO. PARAMETER DESCRIPTION MIN MAX UNIT SDR253 tsu(cmdV-clkH) Setup time, mmc_cmd valid before mmc_clk rising clock edge 5.3 ns SDR254 th(clkH-cmdV) Hold time, mmc_cmd valid after mmc_clk rising clock edge 1.6 ns SDR257 tsu(dV-clkH) Setup time, mmc_dat[i:0] valid before mmc_clk rising clock edge 5.3 ns SDR258 th(clkH-dV) Hold time, mmc_dat[i:0] valid after mmc_clk rising clock edge 1.6 ns |
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