TM
RIMM Module
with 256/288Mb RDRAMs Preliminary
Table 3: Module Connector Pad Description
Signal
Module Connector Pads
I/O Type Description
A1, A3, A5, A7, A9, A11, A13, A15,
A17, A19, A21, A23, A25, A27, A29,
A31, A33, A39, A52, A60, A62, A64,
A66, A68, A70, A72, A74, A76, A78,
A80, A82, A84, A86, A88, A90, A92,
B1, B3, B5, B7, B9, B11, B13, B15,
B17, B19, B21, B23, B25, B27, B29,
B31, B33, B39, B52, B60, B62, B64,
B66, B68, B70, B72, B74, B76, B78,
B80, B82, B84, B86, B88, B90, B92
Ground reference for RDRAM core and interface.
72 PCB connector pads.
Gnd
B10
Clock from master. Interface clock used for receiving
RSL signals from the Channel. Positive polarity.
LCFM
I
I
I
I
I
I
RSL
RSL
VCMOS
RSL
RSL
RSL
B12
Clock from master. Interface clock used for receiving
RSL signals from the Channel. Negative polarity.
LCFMN
LCMD
B34
Serial Command used to read from and write to the
control registers. Also used for power management.
A20, B20, A22, B22, A24
Column bus. 5-bit bus containing control and address
information for column accesses.
LCOL4..
LCOL0
A14
Clock to master. Interface clock used for transmit-
ting RSL signals to the Channel. Positive polarity.
LCTM
A12
Clock to master. Interface clock used for transmit-
ting RSL signals to the Channel. Negative polarity.
LCTMN
A2, B2, A4, B4, A6, B6, A8, B8, A10
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 x16 RDRAM devices.
LDQA8..
LDQA0
I/O RSL
I/O RSL
B32, A32, B30, A30, B28, A28, B26,
A26, B24
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 x16 RDRAM devices.
LDQB8..
LDQB0
B16, A18, B18
A34
Row bus. 3-bit bus containing control and address
information for row accesses.
LROW2..
LROW0
I
I
RSL
Serial Clock input. Clock source used to read from
and write to the RDRAM control registers.
LSCK
VCMOS
A16, B14, A38, B38, A40, B40, A77,
B79
These pads are not connected. These 8 connector
pads are reserved for future use.
NC
A43, B43, A44, B44, A45, B45, A46,
B46, A47, B47, A48, B48, A49, B49,
A50, B50
These pads are not connected. These 16connector
pads art reserved for future use. The 168 contact
RIMM connector does not connect to these PCB
pads.
NC
B83
B81
Clock from master. Interface clock used for receiv-
ing RSL signals from the Channel. Positive polarity.
RCFM
I
I
RSL
RSL
Clock from master. Interface clock used for receiv-
ing RSL signals from the Channel. Negative polar-
ity.
RCFMN
Rev. 0.95 / July.01
4