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TMS320DM355CZCEA13 bảng dữ liệu(PDF) 120 Page - Texas Instruments |
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TMS320DM355CZCEA13 bảng dữ liệu(HTML) 120 Page - Texas Instruments |
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120 / 163 page  TMS320DM355 SPRS463G – SEPTEMBER 2007 – REVISED JUNE 2010 www.ti.com 5.8 MMC/SD The DM355 includes two separate MMC/SD Controllers which are compliant with MMC V3.31, Secure Digital Part 1 Physical Layer Specification V1.1 and Secure Digital Input Output (SDIO) V1.0 specifications. The DM355 MMC/SD Controller has following features: • MultiMediaCard (MMC). • Secure Digital (SD) Memory Card. • MMC/SD protocol support. • SDIO protocol support. • Programmable clock frequency. • 256 bit Read/Write FIFO to lower system overhead. • Slave EDMA transfer capability. The DM355 MMC/SD Controller does not support SPI mode. 5.8.1 MMC/SD Electrical Data/Timing Table 5-15. Timing Requirements for MMC/SD Module (see Figure 5-20 and Figure 5-22) DM355 STANDARD NO. PARAMETER FAST MODE UNIT MODE MIN MAX MIN MAX 1 tsu(CMDV-CLKH) Setup time, SD_CMD valid before SD_CLK high 6 5 ns 2 th(CLKH-CMDV) Hold time, SD_CMD valid after SD_CLK high 2.5(1) 5 ns 3 tsu(DATV-CLKH) Setup time, SD_DATx valid before SD_CLK high 6 5 ns 4 th(CLKH-DATV) Hold time, SD_DATx valid after SD_CLK high 2.5 5 ns (1) For this parameter, you may include margin in your board design so that the toh = 2.5 ns of the MMC/SD device is not degraded at the DM355 input pin. Table 5-16. Switching Characteristics Over Recommended Operating Conditions for MMC/SD Module (see Figure 5-19 through Figure 5-22) DM355 STANDARD NO. PARAMETER FAST MODE UNIT MODE MIN MAX MIN MAX 7 f(CLK) Operating frequency, SD_CLK 0 50 0 25 MHz 8 f(CLK_ID) Identification mode frequency, SD_CLK 0 400 0 400 KHz 9 tW(CLKL) Pulse width, SD_CLK low 7 10 ns 10 tW(CLKH) Pulse width, SD_CLK high 7 10 ns 11 tr(CLK) Rise time, SD_CLK 3 10 ns 12 tf(CLK) Fall time, SD_CLK 3 10 ns 13 td(CLKL-CMD) Delay time, SD_CLK low to SD_CMD transition -7.5 4 -7.5 14 ns 14 td(CLKL-DAT) Delay time, SD_CLK low to SD_DATx transition -7.5 4 -7.5 14 ns 120 DM355 Peripheral Information and Electrical Specifications Copyright © 2007–2010, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TMS320DM355 |
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