Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.NET

X  

Preview PDF Download HTML

V58C265804S Datasheet(PDF) 6 Page - Mosel Vitelic, Corp

Part No. V58C265804S
Description  HIGH PERFORMANCE 2.5 VOLT 8M X 8 DDR SDRAM 4 BANKS X 2Mbit X 8
Download  44 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  MOSEL [Mosel Vitelic, Corp]
Direct Link  http://www.moselvitelic.com
Logo MOSEL - Mosel Vitelic, Corp

V58C265804S Datasheet(HTML) 6 Page - Mosel Vitelic, Corp

Back Button V58C265804S Datasheet HTML 2Page - Mosel Vitelic, Corp V58C265804S Datasheet HTML 3Page - Mosel Vitelic, Corp V58C265804S Datasheet HTML 4Page - Mosel Vitelic, Corp V58C265804S Datasheet HTML 5Page - Mosel Vitelic, Corp V58C265804S Datasheet HTML 6Page - Mosel Vitelic, Corp V58C265804S Datasheet HTML 7Page - Mosel Vitelic, Corp V58C265804S Datasheet HTML 8Page - Mosel Vitelic, Corp V58C265804S Datasheet HTML 9Page - Mosel Vitelic, Corp V58C265804S Datasheet HTML 10Page - Mosel Vitelic, Corp Next Button
Zoom Inzoom in Zoom Outzoom out
 6 / 44 page
background image
6
V58C265804S Rev. 1.3 January 2000
MOSEL VITELIC
V58C265804S
Mode Register Set (MRS)
The mode register stores the data for controlling the various operating modes of DDR SDRAM. It programs
CAS latency, addressing mode, burst length, test mode, DLL reset and various vendor specific options to
make DDR SDRAM useful for a variety of different applications. The default value of the mode register is not
defined, therefore the mode register must be written after EMRS setting for proper DDR SDRAM operation.
The mode register is written by asserting low on CS, RAS, CAS, WE and BA0 (The DDR SDRAM should be
in all bank precharge with CKE already high prior to writing into the mode register). The state of address pins
A0 ~ A11 in the same cycle as CS, RAS, CAS, WE and BA0 low is written in the mode register. Two clock
cycles are required to meet tMRD spec. The mode register contents can be changed using the same com-
mand and clock cycle requirements during operation as long as all banks are in the idle state. The mode reg-
ister is divided into various fields depending on functionality. The burst length uses A0 ~ A2, addressing mode
uses A3, CAS latency (read latency from column address) uses A4 ~ A6. A7 is a Mosel Vitelic specific test
mode during production test. A8 is used for DLL reset. A7 must be set to low for normal MRS operation. Refer
to the table for specific codes for various burst length, addressing modes and CAS latencies.
1.
MRS can be issued only at all banks precharge state.
2.
Minimum tRP is required to issue MRS command.
Address Bus
CAS Latency
A6
A5
A4
Latency
0
0
0
Reserve
0
0
1
Reserve
0
1
0
2
0
1
1
3
1
0
0
Reserve
Reserve
1
0
1
1
1
0
2.5
1
1
1
Reserve
Burst Length
A2
A1
A0
Latency
Sequential
Interleave
0
0
0
Reserve
Reserve
0
0
1
2
2
0
1
0
4
4
0
1
1
8
8
1
0
0
Reserve
Reserve
1
0
1
Reserve
Reserve
1
1
0
Reserve
Reserve
1
1
1
Reserve
Reserve
A7
mode
0
Normal
1
Test
A3
Burst Type
0
Sequential
1
Interleave
* RFU(Reserved for future use)
should stay "0" during MRS
cycle.
A8
DLL Reset
0
No
1
Yes
Mode Register Set
0
RFU : Must be set "0"
Extended Mode Register
Mode Register
DLL
I/O
A0
DLL Enable
0
Enable
1
Disable
A1
I/O Strength
0
Full
1
Half
BA0
An ~ A0
0
(Existing)MRS Cycle
1
Extended Funtions(EMRS)
Command
2
0
1
5
3
4
8
6
7
CK, CK
tCK
tMRD
Precharge
All Banks
Mode
Register Set
tRP*2
*1
Any
Command
BA1
BA 0
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
0
TM
CAS Latency
BT
Burst Length
RFU
DLL
MRS
MRS


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31  32  33  34  35  36  37  38  39  40  41  42  43  44 


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.NET
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn