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AM6421 Datasheet(PDF) 176 Page - Texas Instruments |
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AM6421 Datasheet(HTML) 176 Page - Texas Instruments |
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176 / 237 page  Table 7-59. MMC0 Timing Requirements – High Speed SDR Mode see Figure 7-59 NO. PARAMETER DESCRIPTION MIN MAX UNIT HSSDR3 tsu(cmdV-clkH) Setup time, MMC0_CMD valid before MMC0_CLK rising edge 2.99 ns HSSDR4 th(clkH-cmdV) Hold time, MMC0_CMD valid after MMC0_CLK rising edge 2.67 ns HSSDR7 tsu(dV-clkH) Setup time, MMC0_DAT[7:0] valid before MMC0_CLK rising edge 2.99 ns HSSDR8 th(clkH-dV) Hold time, MMC0_DAT[7:0] valid after MMC0_CLK rising edge 2.67 ns MMC0_CLK MMC0_CMD MMC0_DAT[7:0] HSSDR1 HSSDR2L J7_MMC0_TIMING_03 HSSDR2H HSSDR3 HSSDR4 HSSDR7 HSSDR8 Figure 7-59. MMC0 – High Speed SDR Mode – Receive Mode Table 7-60. MMC0 Switching Characteristics – High Speed SDR Mode see Figure 7-60 NO. PARAMETER DESCRIPTION MIN MAX UNIT fop(clk) Operating frequency, MMC0_CLK 50 MHz HSSDR1 tc(clk) Cycle time, MMC0_CLK 20 ns HSSDR2H tw(clkH) Pulse duration, MMC0_CLK high 9.2 ns HSSDR2L tw(clkL) Pulse duration, MMC0_CLK low 9.2 ns HSSDR5 td(clkL-cmdV) Delay time, MMC0_CLK falling edge to MMC0_CMD transition -6.35 6.35 ns HSSDR6 td(clkL-dV) Delay time, MMC0_CLK falling edge to MMC0_DAT[7:0] transition -6.35 6.35 ns MMC0_CLK MMC0_CMD MMC0_DAT[7:0] HSSDR1 J7_MMC0_TIMING_04 HSSDR2H HSSDR2L HSSDR5 HSSDR6 Figure 7-60. MMC0 – High Speed SDR Mode – Transmit Mode 7.10.5.12.1.3 High Speed DDR Mode Table 7-61, Figure 7-61, Table 7-62, and Figure 7-62 present timing requirements and switching characteristics for MMC0 – High Speed DDR Mode. Table 7-61. MMC0 Timing Requirements – High Speed DDR Mode see Figure 7-61 NO. PARAMETER DESCRIPTION MIN MAX UNIT DDR3 tsu(cmdV-clk) Setup time, MMC0_CMD valid before MMC0_CLK rising edge 3.88 ns DDR4 th(clk-cmdV) Hold time, MMC0_CMD valid after MMC0_CLK rising edge 2.67 ns DDR7 tsu(dV-clk) Setup time, MMC0_DAT[7:0] valid before MMC0_CLK transition 0.83 ns AM6442, AM6441, AM6421 AM6412, AM6411 SPRSP56 – JANUARY 2021 www.ti.com 176 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated Product Folder Links: AM6442 AM6441 AM6421 AM6412 AM6411 |
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