参数资料
型号: MC92604ZT
厂商: Freescale Semiconductor
文件页数: 12/122页
文件大小: 0K
描述: IC TXRX ETH DUAL GIG 196-MAPBGA
标准包装: 630
类型: 收发器
驱动器/接收器数: 2/2
规程: 千兆位以太网
电源电压: 4.5 V ~ 5.5 V
安装类型: 表面贴装
封装/外壳: 196-LBGA
供应商设备封装: 196-MAPBGA(15x15)
包装: 托盘
8B/10B Coding Scheme
MC92604 Dual Gigabit Ethernet Transceiver Reference Manual, Rev. 1
Freescale Semiconductor
B-3
B.1.3
Calculating Running Disparity
Running disparity improves error detection and recovery. The rules for calculating the running disparity
for sub-blocks are as follows (reference Fibre Channel, Gigabit Communications and I/O for Computer
Networks):
Running disparity at the end of any sub-block is positive if (1) the encoded sub-block contains
more 1s than 0s, (2) if the 6-bit sub-block is 6’b00 0111, or (3) if the 4-bit sub-block is 4’b0011.
Running disparity at the end of any sub-block is negative if (1) the encoded sub-block contains
more 0 than 1 bits, (2) if the 6-bit sub-block is 6’b11 1000, or (3) if the 4-bit sub-block is 4’b1100.
Otherwise, running disparity at the end of the sub-block is the same as at the beginning of the
sub-block.
B.2
Data Tables
Table B-2 displays the full valid data character 8B/10B codes. The values in the ‘Data Value HGFEDCBA’
column are the possible bit values of the unencoded transmission characters. The current RD values are
the possible positive and negative running disparity values.
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