參數(shù)資料
型號: K4J52324QC
廠商: SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述: 512Mbit GDDR3 SDRAM
中文描述: 512MB的GDDR3 SDRAM的
文件頁數(shù): 16/57頁
文件大小: 1246K
代理商: K4J52324QC
- 16 -
Rev 1.0 (Mar 2005)
512M GDDR3 SDRAM
K4J52324QC-B
The extended mode register stores the data output driver strength and on-die termination options. The
extended mode register is written by asserting low on CS, RAS, CAS, WE and high on BA0(The GDDR3
SDRAM should be in all bank precharge with CKE already high prior to writing into the extended mode regis-
ter). The state of address pins A0 ~ A11 and BA0,BA1,BA2 in the same cycle as CS, RAS, CAS and WE
going low are written in the extended mode register. The minimum clock cycles specified as tMRD are required
to complete the write operation in the extended mode register. 4 kinds of the output driver strength are sup-
ported by EMRS (A1, A0) code. The mode register contents can be changed using the same command and
clock cycle requirements during operation as long as all banks are in the idle state. "High" on BA0 is used for
EMRS. Refer to the table for specific codes.
EXTENDED MODE REGISTER SET(EMRS)
BA
2
BA
1
BA
0
A
11
A
10
A
9
A
8
A
7
A
6
A
5
A
4
A
3
A
2
A
1
A
0
DLL
A
6
0
1
DLL
Enable
Disable
Additive Latency
A
8
0
1
AL
0
1
RFU
0
1
Term
ID
RON
AL
tWR
DLL
tWR
Termination
Driver Strength
BA
1
0
0
BA
0
0
1
A
n
~ A
0
MRS
EMRS
ADDR/CMD Termination
A
11
0
1
Termination
Default
Half of deafult
Vendor ID
A
10
0
1
Vendor ID
Off
On
tWR
A
7
0
0
0
0
1
1
1
1
A
5
0
0
1
1
0
0
1
1
A
4
0
1
0
1
0
1
0
1
tWR
11
13
5
6
7
8
9
10
Drive Strength
A
1
0
0
1
1
A
0
0
1
0
1
Driver Strength
Autocal
30
40
50
Data
Termination
A
3
A
2
Termination
0
0
ODT Disabled
*1
Reserved
ZQ/4
ZQ/2
0
1
1
1
0
1
* ZQ : Resistor connection pin for On-die termination
RFU(Reserved for future use) should stay
"0" during EMRS cycle
* 1 : ALL ODT will be disabled
Default value is determined by
CKE status at the rising edge of
RESET during power-up
Ron of Pull-up
A
9
RON
0
40
1
60
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