參數(shù)資料
型號: IP-ED8B10B
元件分類: 通信、網(wǎng)絡模塊及開發(fā)工具
英文描述: Telecomm/Datacomm
中文描述: 電信/數(shù)據(jù)通信
文件頁數(shù): 5/11頁
文件大小: 502K
代理商: IP-ED8B10B
Altera Corporation
5
8b10b Encoder/Decoder MegaCore Function (ED8B10B) Data Sheet
Cascaded Encoding
Two encoders can be cascaded to allow for 16-bit word encoding. The
encoders are cascaded by connecting the
rdcascade
output of the most
significant byte (MSByte) encoder to the
rdin
input of the least significant
byte (LSByte) encoder, and by connecting the
rdout
output of the LSByte
encoder to the
rdin
input of the MSByte encoder. These connections
ensure proper running disparity computation. The
rdforce
inputs must
be asserted (active high) for the encoders to take into account the value on
the
rdin
inputs, rather than use their internally generated running
disparity. Both
enable
inputs must be high or low at the same time. The
kin
[1]
signal relates to
datain[15:8]
, and
kin[0]
relates to
datain[7:0]
.
Figure 3
shows two encoders connected together to
perform cascaded encoding.
Figure 3. Cascaded Encoding
Note (1)
Note:
(1)
The
enable
,
idle_ins
, and
rdforce
signals are set high (logic 1).
clk
reset_n
rdout
valid
kerr
clk
reset_n
rdcascade
valid
kerr
rdout
rdin
dataout [9:0]
rdcascade
rdin
[1:0]
kin
[15:0]
datain
enable
rdforce
enable
rdforce
datain [7:0]
datain [15:8]
dataout [9:0]
kin [0]
kin [1]
idle_ins
idle_ins
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