HYR16xx30G/HYR18xx20G
Rambus RIMM Modules
Table 2: Module Connector Pad Description
Signal
Module Connector Pads
I/O
Type
Description
Gnd
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.
LCFM
B10
Clock from master. Interface clock used for receiving
RSL signals from the Channel. Positive polarity.
I
I
I
I
I
I
RSL
RSL
LCFMN
LCMD
B12
Clock from master. Interface clock used for receiving
RSL signals from the Channel. Negative polarity.
B34
Serial Command used to read from and write to the con-
trol registers. Also used for power management.
V
CMOS
LCOL4..
LCOL0
A20, B20, A22, B22, A24
Column bus. 5-bit bus containing control and address
information for column accesses.
RSL
LCTM
A14
Clock to master. Interface clock used for transmitting
RSL signals to the Channel. Positive polarity.
RSL
RSL
LCTMN
A12
Clock to master. Interface clock used for transmitting
RSL signals to the Channel. Negative polarity.
LDQA8..
LDQA0
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 modules with x16 RDRAM devices
I/O
I/O
RSL
LDQB8..
LDQB0
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 modules with x16 RDRAM devices.
RSL
RSL
LROW2..
LROW0
B16, A18, B18
A34
Row bus. 3-bit bus containing control and address infor-
mation for row accesses.
I
I
LSCK
Serial Clock input. Clock source used to read from and
write to the RDRAM control registers.
V
CMOS
NC
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 16 connector pads
are reserved for future use. The 168 contact RIMM con-
nector does not connect to these PCB pads
RCFM
B83
Clock from master. Interface clock used for receiving
RSL signals from the Channel. Positive polarity.
I
I
RSL
RSL
RCFMN
B81
Clock from master. Interface clock used for receiving
RSL signals from the Channel. Negative polarity.
Page 4
Last Modified on 7/13/99
