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T1024 датащи(PDF) 24 Page - Freescale Semiconductor, Inc |
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T1024 датащи(HTML) 24 Page - Freescale Semiconductor, Inc |
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24 / 49 page ![]() 2.13 SDHC interface The enhanced SD Host Controller (eSDHC) provides an interface between host system and SD/MMC cards. The Secure Digital (SD) card is specifically designed to meet the security, capacity, performance, and environmental requirements, inherent in emerging audio and video consumer electronic devices. Booting from eSDHC interface is supported using the processor’s on-chip ROM. On the T1024RDB, a single connector is used for both SD and MMC memory cards, as shown in the below figure. 1.8 V or 3.3 V T1024 SD_WP SD_CD SDHC_CLK CMD DAT[0:3] SD Card WP CD CLK CMD DAT[0:3] 3.3 V Clamping Diodes Figure 2-14. SDHC interface 2.14 USB interface The T1024RDB systems have two integrated USB 2.0 controllers (USB1 and USB2), that allow direct connection to USB ports with appropriate protection circuitry and power supplies. The board features are: • High-speed (480 Mbit/s), full-speed (12 Mbit/s), and low-speed (1.5 Mbit/s) operations • Host mode • Dual-stacked Type A connection Each USB ports are connected to a standard Type A connector for compatibility with most USB peripherals. USB interface QorIQ T1024 Reference Design Board User Guide, Rev. 0, 04/2015 24 Freescale Semiconductor, Inc. |
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