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AM6548BACDXEAF Datasheet(PDF) 213 Page - Texas Instruments |
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AM6548BACDXEAF Datasheet(HTML) 213 Page - Texas Instruments |
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213 / 282 page  Table 7-51. MMC Timing Conditions (continued) PARAMETER MIN MAX UNIT td(Trace Delay) Propagation delay of each trace - SD Specification Default Speed; SDR12 SDR50; SDR104 134 1474 ps High Speed; SDR25 134 1139 ps DDR50 255 11394 ps Propagation delay of each trace - JEDEC eMMC 1.8V, 3.3V Legacy SDR 1.8V, 3.3V High Speed SDR HS200 134 670 ps 1.8V/ 3.3 V High Speed DDR (DDR52) 168 670 ps td(Trace Mismatch Delay) Propagation delay mismatch across all traces Default Speed; 3.3V Legacy SDR 100 ps 3.3V High Speed SDR; HS400 DAT 8 ps All other modes 20 ps Table 7-52 shows the required DLL software configuration settings for MMC timing modes. Table 7-52. MMC DLL Delay Mapping for All Timing Modes REGISTER NAME MMCSDn_SS_PHY_CTRL_4_REG MMCSDn_SS_PHY_CTRL_5_REG BIT FIELD [27:24] [20] [15:12] [8] [4:0] [17:16] [9:8]] [2:0] BIT FIELD NAME STRBSE L OTAPDLYEN A OTAPDLYSE L ITAPDLYEN A ITAPDLYS EL SELDLYTXCL K SELDLYRXCL K SEL100 SEL50 CLKBUFS EL MODE DESCRIPTIO N STROBE DELAY OUTPUT DELAY ENABLE OUTPUT DELAY VALUE INPUT DELAY ENABLE INPUT DELAY VALUE DLL DELAY CHAIN SELECT DLL REF FREQUEN CY DELAY BUFFER DURATIO N Default Speed 4- or 8-bit PHY operating 3.3 V, 25 MHz mode 0x0 0x0 0x0 0x1 0xA 0x3 0x0 0x7 High Speed 4- or 8-bit PHY operating 3.3 V, 50 MHz mode 0x0 0x0 0x0 0x1 0x1 0x3 0x0 0x7 SDR12 4- or 8-bit PHY operating 1.8 V, 25 MHz mode 0x0 0x1 0xF 0x1 0xA 0x3 0x0 0x7 SDR25 4- or 8-bit PHY operating 1.8 V, 50 MHz mode 0x0 0x1 0xF 0x1 0x1 0x3 0x0 0x7 SDR50 4- or 8-bit PHY operating 1.8 V, 100 MHz 0x0 0x1 0x8 0x1 Tuning 0x0 0x2 0x7 High Speed DDR (DDR52) 4- or 8-bit PHY, 1.8V or 3.3V, JEDEC 50 MHz 0x0 0x1 0x5 0x1 0x0 0x0 0x1 0x7 DDR50 4- or 8-bit PHY, 1.8V or 3.3V, SD/SDIO 50 MHz 0x0 0x1 0x4 0x1 Tuning 0x0 0x1 0x7 www.ti.com AM6548, AM6528, AM6526 SPRSP52B – DECEMBER 2019 – REVISED JUNE 2021 Copyright © 2021 Texas Instruments Incorporated Submit Document Feedback 213 Product Folder Links: AM6548 AM6528 AM6526 |
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