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MFC2000 데이터시트(PDF) 97 Page - List of Unclassifed Manufacturers

부품명 MFC2000
상세설명  Multifunctional Peripheral Controller 2000
PDF  426 Pages
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MFC2000 데이터시트(HTML) 97 Page - List of Unclassifed Manufacturers

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Hardware Description
MFC 2000 Multifunctional Peripheral Controller 2000
100723A
Conexant
4-67
This example illustrates a read of two-way interleaved memory with halfword bursts of data (6 halfwords). It also
illustrates that the octal halfword boundary doesn’t occur in the middle of the burst of halfword transfers. It
assumes external drivers to minimize the data bus contention and to insure that the data has enough setup time
to CLK. This waveform also illustrates, increased RASn precharge time and increased address multiplexing time.
Byte bursts of data are not allowed when a 16-bit memory structure is used.
SIUCLK
RASn[0]
CASEn[1:0]
DWRn
ARM ADDR
SIU ADDR
EXT ADDR
a
a+4
a
ROW
+2
COL
+6
+4
COL
DATA
DOEOn
DOEEn
CASOn[1:0]
SIU P_ADDR
a
+2
+6
+4
COL
+8
+10
a+8
+8
+10
Figure 4-22. 2-Way Interleaved DRAM Read (3 words)
The timing diagram illustrates a two-way interleaved DRAM read (3 words). It assumes external drivers to
minimize the data bus contention and to insure that the data has enough setup time to CLK. This waveform also
illustrates, increased RASn precharge time and increased address multiplexing time.
SIUCLK
RASn[1]
CASEn[1:0]
DWRn
ARM ADDR
SIU ADDR
EXT ADDR
a
a+4
a+8
a
ROW
COL
a+4
a+8
COL
a+2
a+6
a+10
DATA
DOEOn
DOEEn
CASOn[1:0]
COL
Figure 4-23. 2-Way Interleaved DRAM Write



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