K4J55323QG Datasheet, PDF (16/53 Pages) Samsung semiconductor – 256Mbit GDDR3 SDRAM

K4J55323QG
256M GDDR3 SDRAM
7.5 MANUFACTURERS VENDOR CODE AND REVISION IDENTIFICATION
The Manufacturers Vendor Code, V, is selected by issuing a EXTENDED MODE REGISTER SET command with bits A10 set to one,
and bits A0-A9 and A11 set to the desired values. When the V function is enabled the GDDR3 SDRAM will provide its manufacturers
vendor code on DQ[3:0] and revision identification on DQ[7:4]
Manufacturer
Reserved
Samsung
Infineon
Elpida
Etron
Nanya
DQ[3:0]
0
1
2
3
4
5
Manufacturer
Hynix
Mosel
Winbond
ESMT
Reserved
Reserved
DQ[3:0]
6
7
8
9
A
B
Manufacturer
Reserved
Reserved
Reserved
Micron
DQ[3:0]
C
D
E
F
Vendor ID Read
T0
T1
Ta2
Tb3
Tc4
Td5
Te6
Tf7
CK
CK
RES
t_CH t_CL
t_IS t_IH
CKE
t_IS t_IH
COMMAND
High
DQ[3:0]
t_RP
t_MRD
>20ns
>20ns
Vendor Code
t_MRD
t_MRD
200 cycle
t_MRD
t_RP
Precharge
All Banks
Dummy_MRS
w/ specified value
EMRS
Vendor_ID
On
EMRS
Vendor_ID
Off
MRS
Precharge
All Banks
1st
Auto Refresh
DON’T CARE
TRANSITIONING DATA
16 of 53
Rev. 1.1 November 2005