copyright ? by eureka technology inc. 4962 el camino real, los altos, ca 94022, usa tel: 1 650 960 3800 fax: 1 650 960 3805 http://www.eurekatech.com page 1 eureka technology EP550 sdio/sd memory/mmc host controller features ? host controller for secure digital (sd) , sdio, sd combo, and multimedia card (mmc) bus. ? allows host cpu to access sd and mmc devices. ? compatible with sd 2.0, including high capacity (sdhc) and 8-bit mmc 4.2 specifications. ? many choices of cpu interfaces, including ahb, apb, sh4, wishbone, pci and generic user interface. ? supports sdma operation with option to remove sdma for very small gate count implementation. ? selectable data buffer size from 512 to 16kbytes. ? hardware support of crc error de tection and inte rrupt generation. ? supports multi-function sd cards in cluding command susp end, resume, and read wait. ? option to operate user interface and card control at different clock domains. ? supports all sd-enabled oper ating systems including windows. ? free source code included for bus driver development. ? fully sythesizable code ideal fo r asic and fpga implementations. ? fully static design with edge triggered flip-flops. block diagram bus bus slave master sd host control control registers dma control (optional) data buffer optional interface standard cpu or generic user interface sd card interface product summary
copyright ? by eureka technology inc. 4962 el camino real, los altos, ca 94022, usa tel: 1 650 960 3800 fax: 1 650 960 3805 http://www.eurekatech.com page 2 eureka technology description the EP550 is a host controller for sd memory, sdio, sd combo and mmc inter- face. the core connects the host cpu of th e system to the sd card socket. exter- nal sd cards can be accessed by the host cpu through the EP550 controller ip core. sd memory and sdio are low cost, high speed interfaces designed for removable mass storage and io devices. it is a very flexible architecture supporting variable clock rate and 1 to 4-bit sd data width. data rate up to 25mbyte/sec (200mbs) can be realized with sd interface. the mm c standard allows up to 8-bit of paral- lel data to be transferred with data rate of 50mbyt e/sec. features such as plug and play, auto-detection, error correction, wr ite protection are standard with sd card interface and supported by the EP550. the EP550 sd card host controller core is designed according to the sd associa- tion?s latest sd host controller specificatio n (version 2.0). the core presents itself as a standard register set to the os a nd application software. to access the sd card, the host cpu simply issue read/write access to the control registers in the core. the controllers core ha ndles all the sd card prot ocol automatically includ- ing data shifting, timing and crc generatio n. the core has an optional dma con- troller so that data can be automatically transferred between the system and the sd card without cpu intervention. becaus e it supports the standard sd register set, the EP550 is automatically recognized by any operating systems that supports the sd bus. no driver development is ne eded. in applications where there is no operating system of the os does not ha ve built-in sd support, eureka provides free source code to help us er develop the bus driver. there are several options for user hardwa re interface to the controller core. the controller supports generic user interface optimized for on-chi p logic interface as well as embedded cpu interface such as amba ahb and apb bus, wishbone, sh4, pci and generic address/data interface. with the EP550, sd card in terface can be realized w ith very little development cost and effort. designer can add sd memo ry and sdio interface to the system by simply adding the EP550 module without impacting the rest of the system archi- tecture. free source code the EP550 implements the standard sd host controller register set which supports any standard operating systems that suppor ts sd bus. for app lications where the user need to develop its own sd driver software, eureka provides free source code for driver development. EP550 sd/sdio/mmc host controller
copyright ? by eureka technology inc. 4962 el camino real, los altos, ca 94022, usa tel: 1 650 960 3800 fax: 1 650 960 3805 http://www.eurekatech.com page 3 eureka technology optional features the EP550 standard core features a simp le generic user interface which can be connected easily into any de sign. in addition, eureka also offer the EP550 with ahb, apb, sh4, wishbone and pci bus in terface. for certain interfaces, the bus interface may operate at a different clock domain from the sd host controller. the core is also available with and without dma. actel device utilization data family device utilization performance (-speed grade) seq comb total ram proasic3 a3p1000-2 900 3392 17% 2 53mhz axcelerator ax1000-2 894 2090 16% 2 59mhz igloo agl600v5 996 3633 33% 2 34mhz fusion afs1500 900 3429 11% 2 56mhz EP550 sd/sdio/mmc host controller
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