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MC-4R128CPE6C Datasheet(PDF) 5 Page - NEC

Part # MC-4R128CPE6C
Description  Direct Rambus DRAM RIMM Module 128M-BYTE 64M-WORD x 16-BIT
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

MC-4R128CPE6C Datasheet(HTML) 5 Page - NEC

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Preliminary Data Sheet M14807EJ2V0DS00
5
MC-4R128CPE6C
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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