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MC-4R256CPE6C-745 Datasheet(PDF) 5 Page - Elpida Memory

Part # MC-4R256CPE6C-745
Description  Direct Rambus??DRAM RIMM??Module 256M-BYTE (128M-WORD x 16-BIT)
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Manufacturer  ELPIDA [Elpida Memory]
Direct Link  http://www.elpida.com/en
Logo ELPIDA - Elpida Memory

MC-4R256CPE6C-745 Datasheet(HTML) 5 Page - Elpida Memory

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Preliminary Data Sheet E0043N11
5
MC-4R256CPE6C
Module Connector Pad Description
(1/2)
Signal
I/O
Type
Description
GND
Ground reference for RDRAM core and interface. 72 PCB connector pads.
LCFM
I
RSL
Clock from master. Interface clock used for receiving RSL signals from the
Channel. Positive polarity.
LCFMN
I
RSL
Clock from master. Interface clock used for receiving RSL signals from the
Channel. Negative polarity.
LCMD
I
VCMOS
Serial Command used to read from and write to the control registers. Also used
for power management.
LCOL4..LCOL0
I
RSL
Column bus. 5-bit bus containing control and address information for column
accesses.
LCTM
I
RSL
Clock to master. Interface clock used for transmitting RSL signals to the Channel.
Positive polarity.
LCTMN
I
RSL
Clock to master. Interface clock used for transmitting RSL signals to the Channel.
Negative polarity.
LDQA8..LDQA0
I/O
RSL
Data bus A. A 9-bit bus carrying a byte of read or write data between the Channel
and the RDRAM. LDQA8 is non-functional on modules with x16 RDRAM devices.
LDQB8..LDQB0
I/O
RSL
Data bus B. A 9-bit bus carrying a byte of read or write data between the Channel
and the RDRAM. LDQB8 is non-functional on modules with x16 RDRAM devices.
LROW2..LROW0
I
RSL
Row bus. 3-bit bus containing control and address information for row accesses.
LSCK
I
VCMOS
Serial clock input. Clock source used to read from and write to the RDRAM
control registers.
NC
These pads are not connected. These 24 connector pads are reserved for future
use.
RCFM
I
RSL
Clock from master. Interface clock used for receiving RSL signals from the
Channel. Positive polarity.
RCFMN
I
RSL
Clock from master. Interface clock used for receiving RSL signals from the
Channel. Negative polarity.
RCMD
I
VCMOS
Serial Command Input used to read from and write to the control registers. Also
used for power management.
RCOL4..RCOL0
I
RSL
Column bus. 5-bit bus containing control and address information for column
accesses.
RCTM
I
RSL
Clock to master. Interface clock used for transmitting RSL signals to the Channel.
Positive polarity.
RCTMN
I
RSL
Clock to master. Interface clock used for transmitting RSL signals to the Channel.
Negative polarity.
RDQA8..RDQA0
I/O
RSL
Data bus A. A 9-bit bus carrying a byte of read or write data between the Channel
and the RDRAM. RDQA8 is non-functional on modules with x16 RDRAM devices.
RDQB8..RDQB0
I/O
RSL
Data bus B. A 9-bit bus carrying a byte of read or write data between the Channel
and the RDRAM. RDQB8 is non-functional on modules with x16 RDRAM devices.
RROW2..RROW0
I
RSL
Row bus. 3-bit bus containing control and address information for row accesses.


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