MC-4R256CEE6B-845 View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

View to exact match

MC-4R256CEE6B-845

Direct Rambus™ DRAM RIMM™ Module 256M-BYTE (128M-WORD x 16-BIT)

NEC => Renesas Technology 

MC-4R256CEE6B, 4R256CEE6C

Module Connector Pad Description

(1/2)

Signal

I/O

GND

—

LCFM

I

LCFMN

I

LCMD

I

LCOL4..LCOL0

I

LCTM

I

LCTMN

I

LDQA8..LDQA0 I/O

LDQB8..LDQB0 I/O

LROW2..LROW0 I

LSCK

I

NC

—

RCFM

I

RCFMN

I

RCMD

I

RCOL4..RCOL0

I

RCTM

I

RCTMN

I

RDQA8..RDQA0 I/O

RDQB8..RDQB0 I/O

RROW2..RROW0 I

Type

—

RSL

RSL

VCMOS

RSL

RSL

RSL

RSL

RSL

RSL

VCMOS

—

RSL

RSL

VCMOS

RSL

RSL

RSL

RSL

RSL

RSL

Description

Ground reference for RDRAM core and interface. 72 PCB connector pads.

Clock from master. Interface clock used for receiving RSL signals from the

Channel. Positive polarity.

Clock from master. Interface clock used for receiving RSL signals from the

Channel. Negative polarity.

Serial Command used to read from and write to the control registers. Also used

for power management.

Column bus. 5-bit bus containing control and address information for column

accesses.

Clock to master. Interface clock used for transmitting RSL signals to the

Channel. Positive polarity.

Clock to master. Interface clock used for transmitting RSL signals to the

Channel. Negative polarity.

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.

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.

Row bus. 3-bit bus containing control and address information for row accesses.

Serial clock input. Clock source used to read from and write to the RDRAM

control registers.

These pads are not connected. These 24 connector pads are reserved for future

use.

Clock from master. Interface clock used for receiving RSL signals from the

Channel. Positive polarity.

Clock from master. Interface clock used for receiving RSL signals from the

Channel. Negative polarity.

Serial Command Input used to read from and write to the control registers. Also

used for power management.

Column bus. 5-bit bus containing control and address information for column

accesses.

Clock to master. Interface clock used for transmitting RSL signals to the

Channel. Positive polarity.

Clock to master. Interface clock used for transmitting RSL signals to the

Channel. Negative polarity.

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.

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.

Row bus. 3-bit bus containing control and address information for row accesses.

Preliminary Data Sheet M14541EJ1V1DS00

5

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