CD2231

Manufacturer Part NumberCD2231
DescriptionCD2231 Intelligent Two-channel Lan And Wan Communications Controller
ManufacturerIntel Corporation
CD2231 datasheet
 


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Intelligent Two-Channel LAN and WAN Communications Controller — CD2231
Figure 10. Bit Rate Generator/DPLL
System
Clock
8
Clk 0
32
Clk 1
128
Clk 2
512
Clk 3
2048
Clk 4
RXCIN or TXCIN
RX bit clk
(for TX BRG only)
Receive Clock Option Register (RCOR)
TLVal
res
Transmit Clock Option Register (TCOR)
ClkSel2
ClkSel1
Table 4. Clock Source Select (Sheet 1 of 2)
ClkSel2
ClkSel1
0
0
0
0
0
1
0
1
1
0
1
0
Datasheet
Period Register
(RBPR or TBPR)
Adjustments
applied here
(for DPLL only)
0
1
2
3
4
Mux
5
6
7
From RCOR/TCOR
dpllEn
Dpllmd1
Dpllmd0
ClkSel0
res
Ext-1X
ClkSel0
Select
0
Clk 0
1
Clk 1
0
Clk 2
1
Clk 3
0
Clk 4
1
Reserved
Mux
Count Register
(RBCR or TBCR)
dec/inc
N
Zero Detect
CA
C8
B
R/W
ClkSel2
ClkSel1
ClkSel0
C2
C0
B
R/W
res
LLM
res
59