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AM6441...ALV 数据表(PDF) 146 Page - Texas Instruments |
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AM6441...ALV 数据表(HTML) 146 Page - Texas Instruments |
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146 / 244 page  Table 7-53. GPMC and NOR Flash Switching Characteristics – Synchronous Mode (continued) see Figure 7-39, Figure 7-40, Figure 7-41, Figure 7-42, and Figure 7-43 NO. (3) PARAMETER DESCRIPTION MODE (17) MIN MAX MIN MAX UNIT 100 MHz 133 MHz F15 td(clkL-do) Delay time, GPMC_CLK falling edge to GPMC_AD[n:0](1) data bus transition (12) div_by_1_mode; GPMC_FCLK_MUX; TIMEPARAGRANULARITY_X1 J - 2.3 (10) J + 2.7 J - 2.3 (10) J + 2.7 ns F15 td(clkL-do). Delay time, GPMC_CLK falling edge to GPMC_AD[n:0](1) data bus transition (13) div_by_1_mode; GPMC_FCLK_MUX; TIMEPARAGRANULARITY_X1 J - 2.3 (10) J + 2.7 J - 2.3 (10) J + 2.7 ns F17 td(clkH-be[x]n) Delay time, output clock GPMC_CLK rising edge to output lower byte enable and command latch enable GPMC_BE0n_CLE transition (11) div_by_1_mode; GPMC_FCLK_MUX; TIMEPARAGRANULARITY_X1 J - 2.3 (10) J + 1.9 J - 2.3 (10) J + 1.9 ns F17 td(clkL-be[x]n) Delay time, GPMC_CLK falling edge to GPMC_BE0n_CLE, GPMC_BE1n transition (12) div_by_1_mode; GPMC_FCLK_MUX; TIMEPARAGRANULARITY_X1 J - 2.3 (10) J + 1.9 J - 2.3 (10) J + 1.9 ns F17 td(clkL-be[x]n). Delay time, GPMC_CLK falling edge to GPMC_BE0n_CLE, GPMC_BE1n transition (13) div_by_1_mode; GPMC_FCLK_MUX; TIMEPARAGRANULARITY_X1 J - 2.3 (10) J + 1.9 J - 2.3 (10) J + 1.9 ns F18 tw(csnV) Pulse duration, output chip select GPMC_CSn[i] (14) low Read A A ns Write A A ns F19 tw(be[x]nV) Pulse duration, output lower byte enable and command latch enable GPMC_BE0n_CLE, output upper byte enable GPMC_BE1n low Read C C ns Write C C ns F20 tw(advnV) Pulse duration, output address valid and address latch enable GPMC_ADVn_ALE low Read K K ns Write K K ns (1) Synchronous Mode supports 16-bit data bus up to 133 MHz and 32-bit data bus up to 100 MHz (2) For single read: A = (CSRdOffTime - CSOnTime) × (TimeParaGranularity + 1) × GPMC_FCLK(15) For burst read: A = (CSRdOffTime - CSOnTime + (n - 1) × PageBurstAccessTime) × (TimeParaGranularity + 1) × GPMC_FCLK(15) For burst write: A = (CSWrOffTime - CSOnTime + (n - 1) × PageBurstAccessTime) × (TimeParaGranularity + 1) × GPMC_FCLK(15) With n being the page burst access number. (3) B = ClkActivationTime × GPMC_FCLK(15) (4) For single read: D = (RdCycleTime - AccessTime) × (TimeParaGranularity + 1) × GPMC_FCLK(15) For burst read: D = (RdCycleTime - AccessTime) × (TimeParaGranularity + 1) × GPMC_FCLK(15) For burst write: D = (WrCycleTime - AccessTime) × (TimeParaGranularity + 1) × GPMC_FCLK(15) (5) For single read: E = (CSRdOffTime - AccessTime) × (TimeParaGranularity + 1) × GPMC_FCLK(15) For burst read: E = (CSRdOffTime - AccessTime) × (TimeParaGranularity + 1) × GPMC_FCLK(15) For burst write: E = (CSWrOffTime - AccessTime) × (TimeParaGranularity + 1) × GPMC_FCLK(15) (6) For csn falling edge (CS activated): • Case GPMCFCLKDIVIDER = 0: – F = 0.5 × CSExtraDelay × GPMC_FCLK(15) • Case GPMCFCLKDIVIDER = 1: – F = 0.5 × CSExtraDelay × GPMC_FCLK(15) if (ClkActivationTime and CSOnTime are odd) or (ClkActivationTime and CSOnTime are even) – F = (1 + 0.5 × CSExtraDelay) × GPMC_FCLK(15) otherwise • Case GPMCFCLKDIVIDER = 2: – F = 0.5 × CSExtraDelay × GPMC_FCLK(15) if ((CSOnTime - ClkActivationTime) is a multiple of 3) – F = (1 + 0.5 × CSExtraDelay) × GPMC_FCLK(15) if ((CSOnTime - ClkActivationTime - 1) is a multiple of 3) – F = (2 + 0.5 × CSExtraDelay) × GPMC_FCLK(15) if ((CSOnTime - ClkActivationTime - 2) is a multiple of 3) (7) For ADV falling edge (ADV activated): • Case GPMCFCLKDIVIDER = 0: – G = 0.5 × ADVExtraDelay × GPMC_FCLK(15) • Case GPMCFCLKDIVIDER = 1: AM6442, AM6441, AM6421, AM6412, AM6411 SPRSP56D – JANUARY 2021 – REVISED JULY 2022 www.ti.com 146 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated Product Folder Links: AM6442 AM6441 AM6421 AM6412 AM6411 |
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