L9D320G32BG6 Datasheet, PDF (71/154 Pages) LOGIC Devices Incorporated – 2.0 Gb, DDR3, 64 M x 32 Integrated Module (IMOD)

ADVANCE INFORMATION L9D320G32BG6
2.0 Gb, DDR3, 64 M x 32 Integrated Module (IMOD)
ACTIVATE
READ
The ACTIVATE command is used to open (or ACTIVATE) a row in a
particular bank for a subsequent access. The value on the BA [2:0]
inputs selects the bank, and the address provided on inputs A[n:0] selects
the row. This row remains open (or ACTIVE) for accesses until a PRE-
CHARGE command is issued to that bank.
A PRECHARGE command must be issued before opening a different row
in the same bank.
The READ command is used to initiate a burst READ access to an ACTIVE
row. The address provided on inputs A[2:0] selects the starting column
address depending on the burst length and burst type selected (see table
65). The value on input A10 determines whether or not auto precharge is
used. If auto precharge is selected, the row being accessed will be PRE-
CHARGED at the end of the READ burst. If AUTO PRECHARGE is not
selected, the row will remain open for subsequent accesses. The value on
input A12 (if enabled in the MODE REGISTER) when the READ command
is issued, determines whether BC4 (chop) or BL8 is used. After a READ
command is issued, the READ burst may not be interrupted. A summary
of READ commands is shown in Table 61.
TABLE 61: READ COMMAND SUMMARY
CKE
Function
Prev Next
Symbol Cycle Cycle
READ
BL8MRS
BC4MRS
RD
H
BC4OTF RDS4
H
BL8OTF RDS8
H
BL8MRS
BC4MRS
RDAP
H
READ with AUTO
BC4OTF RDAPS4
H
PRECHARGE
BL8OTF _RDAPS8
H
CS\ RAS\ CAS\ WE\ BA[2:0] An
A12
L
H
L
H
BA
RFU
V
L
H
L
H
BA
RFU
L
L
H
L
H
BA
RFU
H
L
H
L
H
BA
RFU
V
L
H
L
H
BA
RFU
L
L
H
L
H
BA
RFU
H
A10 A[11,0:0] Notes
L
CA
L
CA
L
CA
H
CA
H
CA
H
CA
WRITE
The WRITE command is used to initiate a burst WRITE access to an ACTIVE row. The value on the BA[2:0] inputs selects the bank. The value on input A10
determines whether or not AUTO PRECHARGE is used. The value on input A12 (if enabled in the MODE REGISTER [MR]) when the WRITE command is
issued, determines whether BC4 (chop) or BL8 is used. The WRITE command summary is shown in Table 62.
TABLE 62: WRITE COMMAND SUMMARY
CKE
Function
Prev Next
Symbol Cycle Cycle
BL8MRS
BC4MRS
WR
H
WRITE
BC4OTF WRS4
H
BL8OTF WRS8
H
BL8MRS
BC4MRS
WRAP
H
WRITE with AUTO
BC4OTF WRAPS4
H
PRECHARGE
BL8OTF _WRAPS8
H
CS\ RAS\ CAS\ WE\ BA[2:0] An
A12
L
H
L
L
BA
RFU
V
L
H
L
L
BA
RFU
L
L
H
L
L
BA
RFU
H
L
H
L
L
BA
RFU
V
L
H
L
L
BA
RFU
L
L
H
L
L
BA
RFU
H
A10 A[11,0:0] Notes
L
CA
L
CA
L
CA
H
CA
H
CA
H
CA
LOGIC Devices Incorporated
www.logicdevices.com
High Performance, Integrated Memory Module Product
71
Jul 08, 2009 LDS-L9D320G32BG6-A