PD488588FF Datasheet, PDF (71/79 Pages) Elpida Memory – 288M bits Direct Rambus DRAM for High Performance Solution

µPD488588FF-C80-40
Figure 40-1 ACT, PRE, RD, and WR Commands for Eight RDRAM System with IDM = 1
RDRAM 0
DEVID
4..0
00000
RDRAM 1
00001
DR4..3 ^{compare to}
DC4..3 DEVID4..3
access
device
bank array
BR5..0
•
BC5..0
•
•
access
bank
•
one bank
••
R12..0
access
row
•
••
•
••
PRE ^ACT
same as
device 0
C6..0
access
column
••
WR
saemnps.e
••
RD
RDRAM 2
00010
same as
device 0
RDRAM 3
00011
RDRAM 4
00100
same as
device 0
same as
device 0
RDRAM 5
00101
same as
device 0
RDRAM 6
00110
same as
device 0
RDRAM 7
00111
same as
device 0
DC2..0
=000
form
dualoct
DQA7
DQB7
DQA8
Channel
DQA6
DQB6
DQB8
DQA0
•
DQA8
DQB0
•
DQB8
CTM/CFM
DQA5
DQB5
DQA4
DQB4
DQA3
DQB3
DQA2
DQB2
DQA1
DQB1
DQA0
DQB0
•
•
•
•
device (2^B banks)
notation
••
•
••
•
••
bank (2^R rows)
••
row (2^C dualocts)
dualoct (144 bits)
one bit
Data Sheet E0251N20 (Ver. 2.0)
71