参数资料
型号: W9725G6KB-25I
厂商: Winbond Electronics
文件页数: 17/87页
文件大小: 0K
描述: IC DDR2 SDRAM 256MBIT 84WBGA
标准包装: 209
格式 - 存储器: RAM
存储器类型: DDR2 SDRAM
存储容量: 256M(16Mx16)
速度: 2.5ns
接口: 并联
电源电压: 1.7 V ~ 1.9 V
工作温度: -40°C ~ 95°C
封装/外壳: 84-TFBGA
供应商设备封装: 84-WBGA(8x12.5)
包装: *
其它名称: Q7118748
W9725G6KB
For proper operation of adjust mode, WL = RL - 1 = AL + CL - 1 clocks and t DS /t DH should be met as
shown in Figure 7. For input data pattern for adjustment, D T0 - D T3 is a fixed order and is not affected
by burst type (i.e., sequential or interleave).
CLK
CLK
CMD
EMRS
NOP
NOP
NOP
NOP
NOP
NOP
EMRS
NOP
DQS_in
WL
tDS tDH
DQS
WR
DQ_in
DT0
DT1
DT2
DT3
DM
OCD adjust mode
OCD calibration mode exit
Figure 7 – OCD Adjust Mode
8.2.3.3
Drive Mode
Drive mode, both Drive (1) and Drive (0), is used for controllers to measure DDR2 SDRAM Driver
impedance. In this mode, all outputs are driven out t OIT after “enter drive mode” command and all
output drivers are turned-off t OIT after “OCD calibration mode exit” command as shown in Figure 8.
CLK
CLK
CMD
EMRS
NOP
NOP
NOP
NOP
EMRS
NOP
NOP
NOP
t OIT
t OIT
DQS
DQS
DQS high & DQS low for Drive (1), DQS low & DQS high for Drive (0)
DQs high for Drive (1)
HI-Z
DQ
Enter Drive mode
DQs low for Drive (0)
OCD calibration mode exit
Figure 8 – OCD Drive Mode
Publication Release Date: Sep. 03, 2012
- 17 -
Revision A03
相关PDF资料
PDF描述
W972GG6JB-3I IC DDR2 SDRAM 2GBITS 84WBGA
W9751G6IB-25 IC DDR2-800 SDRAM 512MB 84-WBGA
W9751G6KB-25 IC DDR2 SDRAM 512MBIT 84WBGA
W9812G6JH-6I IC SDRAM 128MBIT 54TSOPII
W9816G6IH-6I IC SDRAM 16MBIT 50TSOPII
相关代理商/技术参数
参数描述
W9725G6KB25I TR 制造商:Winbond Electronics Corp 功能描述:256M DDR2-800, X16, IND TEMP
W9725G6KB25K 制造商:WINBOND 制造商全称:Winbond 功能描述:DLL aligns DQ and DQS transitions with clock, Data masks (DM) for write data, Write Data Mask
W9725G6KB-3 制造商:WINBOND 制造商全称:Winbond 功能描述:DLL aligns DQ and DQS transitions with clock, Data masks (DM) for write data, Write Data Mask
W9725G8JB 制造商:WINBOND 制造商全称:Winbond 功能描述:8M ? 4 BANKS ? 8 BIT DDR2 SDRAM
W9725G8JB25 制造商:Winbond Electronics Corp 功能描述:DRAM Chip DDR2 SDRAM 256M-Bit 32Mx8 1.8V 60-Pin WBGA