Datasheet
SM646UDR26485-2-I
January 31, 2006
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7
Notes:
1. Ax, BAx, RAS#, CAS#, WE# resistors: 5.1Ω±5%.
Clock Wiring
CK0/CK0# 2 SDRAMs
CK1/CK1# 3 SDRAMs
CK2/CK2# 3 SDRAMs
2pF
200Ω
CK0
CK0#
DDR2 SDRAMs
SA0 V
DD
SA1
SA2
SCL
SDA WP
SA0
SA1
SA2
SCL
SDA
V
DDSPD
SPD
EEPROM
V
DD
/V
DDQ
/V
DDSPD
/V
REF
Decoupling
V
SS
Capacitors
1pF
200Ω
CK1
CK1#
DDR2 SDRAMs
1pF
200Ω
CK2
CK2#
DDR2 SDRAMs
to all SDRAMs (D0~D7)
to all SDRAMs (D0~D7)
to all SDRAMs (D0~D7)
to all SDRAMs (D0~D7)
to all SDRAMs (D0~D7)
to all SDRAMs (D0~D7)
to all SDRAMs (D0~D7)
to all SDRAMs (D0~D7)
A0~A13
BA0, BA1
RAS#
CAS#
WE#
ODT0
CKE0
CS0#
5.1Ω