168-pin Low Profile Registered SDRAM DIMMs
256MB, 512MB, 1GB
Preliminary Data Sheet
1GB ECC DIMM Functional Block Diagram – SM1K09BRDT4
Clock Wiring
RS1#
RS0#
CK0
CK1
CK2
CK3
PLL
Terminated
Terminated
Terminated
RDQMB0
DQ(3:0)
RDQMB4
U0L
U1L
U2L
U3L
U4L
U0U
U1U
U2U
U3U
U4U
U9L
U9U
U10U
U11U
U12U
U13U
DQ(35:32)
10
CK1-3
U10L
U11L
U12L
U13L
12pF
DQ(7:4)
DQ(39:36)
RDQMB1
DQ(11:8)
RDQMB5
SDRAM x 3
SDRAM x 3
SDRAM x 3
SDRAM x 3
SDRAM x 3
SDRAM x 3
Register x 2
DQ(43:40)
10
CK0
PLL
DQ(15:12)
CB(3:0)
DQ(47:44)
CB(7:4)
12pF
SCL
SDA
Serial PD
RS3#
RS2#
SA0-2
WP
47K
RDQMB2
DQ(19:16)
RDQMB6
U5L
U6L
U7L
U8L
U5U
U6U
U7U
U8U
U14L
U15L
U16L
U17L
U14U
U15U
U16U
U17U
DQ(51:48)
Vdd
Vss
Vdd SDRAM U0-17
Vss SDRAM U0-17
DQ(23:20)
DQ(55:52)
RAS#
RRAS#
RCAS#
RDQMB3
DQ(27:24)
RDQMB7
DQ(59:56)
CAS#
CKE0
R
RCKE0
E
G
I
WE#
RWE#
DQ(31:28)
DQ(63:60)
S
T
E
R
A0-12
RA0-12
RBA0-1
RS0-3#
RDQMB0-7
BA0-1
S0-3#
DQMB0-7
PLL CLK
Note:
10K
All DQ resistor values are 10 ohms.
All CK resistor values are 10 ohms.
U0-U17 are 128Mx4 stacked SDRAM devices.
VDD
REGE
Enhanced Memory Systems Inc., 1850 Ramtron Dr., Colo Spgs, CO 80921
PHONE: (800) 545-DRAM; FAX: (719) 488-9095; http://www.edram.com
2001 Enhanced Memory Systems. All rights reserved.
The information contained herein is subject to change without notice.
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Revision 1.1
RAMTRON [ RAMTRON INTERNATIONAL CORPORATION ]
