参数资料
型号: W631GG6KB-12
厂商: Winbond Electronics
文件页数: 33/159页
文件大小: 0K
描述: IC DDR3 SDRAM 1GBIT 96WBGA
标准包装: 200
格式 - 存储器: RAM
存储器类型: DDR3 SDRAM
存储容量: 1G(64M x 16)
速度: 800MHz
接口: 并联
电源电压: 1.425 V ~ 1.575 V
工作温度: 0°C ~ 85°C
封装/外壳: 96-TFBGA
供应商设备封装: 96-WBGA(9x13)
包装: 托盘
W631GG6KB
8.9.3
Write Leveling Mode Exit
The following sequence describes how the Write Leveling Mode should be exited:
1. After the last rising strobe edge (see ~T0), stop driving the strobe signals (see ~Tc0). Note: From
now on, DQ pins are in undefined driving mode, and will remain undefined, until t MOD after the
respective MR command (Te1).
2. Drive ODT pin low (t IS must be satisfied) and continue registering low. (see Tb0).
3. After the R TT is switched off, disable Write Level Mode via MRS command (see Tc2).
4. After t MOD is satisfied (Te1), any valid command may be registered. (MR commands may be
issued after t MRD (Td1).
T0
T1
T2
Ta0
Tb0
Tc0
Tc1
Tc2
Td0
Td1
Te0
Te1
CK#
CK
Command
NOP
NOP
NOP
NOP
NOP
NOP
NOP
MRS
NOP
VALID
NOP
VALID
t MRD
Address
t IS
MR1
VALID
t MOD
VALID
ODT
ODTLoff
t AOF min
R TT _DQS_DQS#
Rtt_Nom
t AOF max
DQS_DQS#
R TT _DQ
DQ *1
t WLO + t WLOE
result = 1
UNDEFINED DRIVING MODE
TRANSITIONING
TIME BREAK
DON'T CARE
Note:
1. The DQ result = 1 between Ta0 and Tc0 is a result of the DQS, DQS# signals capturing CK high just after the T0 state.
Figure 15 – Timing details of Write leveling exit
Publication Release Date: Dec. 09, 2013
Revision A05
- 33 -
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