参数资料
型号: GT-48208
厂商: Galileo Technology Services, LLC
英文描述: Advanced Switched Ethernet Controllers for 10+10/100 BaseX(高级交换式 10+10/100 BaseX以太网控制器)
中文描述: 先进的交换式以太网控制器的10 10/100 BaseX(高级交换式10 10/100 BaseX以太网控制器)
文件页数: 113/135页
文件大小: 1619K
代理商: GT-48208
GT-482xx Switched Ethernet Controllers for 10+10/100 BaseX
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Revision 1.2
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16.7
CPU Interface Priority
CPU Access to the GT-482xx’s DRAM is the lowest priority in the DRAM arbiter. In order to prevent deadlocks, the
GT-482xx incorporates a CPU-to-DRAM access timer. This timer starts counting when the CPU requests an
access to the DRAM. When the timer expires, the CPU will be the next master to access the DRAM. The timer can
be enabled and programed via CPU Time Out Register.
16.8
Memory Endianess
The GT-482xx treats SDRAM as a little-endian array. When data is fetched from a 32-bit word for transmission it
is fetched in the following sequence: bits [7:0], bits [15:8], bits [23:16], bits [31:24]. The software engineer should
keep this in mind when creating/modifying packets within GT-482xx memory.
相关PDF资料
PDF描述
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