參數(shù)資料
型號(hào)： MC-4R256FKE8D-653
廠商： ELPIDA MEMORY INC
元件分類(lèi)： DRAM
英文描述： 190730050
中文描述： 128M X 18 DIRECT RAMBUS DRAM MODULE, 1.56 ns, DMA184
封裝： RIMM-184
文件頁(yè)數(shù)： 5/14頁(yè)
文件大小： 116K
代理商： MC-4R256FKE8D-653
Data Sheet
E0079N20 (Ver 2.0)
5
MC-4R256FKE8D
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
V
CMOS
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
V
CMOS
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
V
CMOS
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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