W9412G6IH-5 Winbond Electronics, W9412G6IH-5 Datasheet - Page 9

• Manufacturer Part Number: W9412G6IH-5
• Description: IC DDR-400 SDRAM 128MB 66TSSOPII
• Manufacturer: Winbond Electronics

Specifications of W9412G6IH-5

• Format - Memory: RAM
• Memory Type: DDR SDRAM
• Memory Size: 128M (8Mx16)
• Speed: 250MHz
• Interface: Parallel
• Voltage - Supply: 2.3 V ~ 2.7 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 66-TSOPII
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7. FUNCTIONAL DESCRIPTION
7.1
Command
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
CLK
CLK
Power Up Sequence
1) Apply V
2) Apply V
Apply power and attempt to CKE at a low state ( ≤ 0.2V), all other inputs may be undefined
Start Clock and maintain stable condition for 200 µS (min.).
After stable power and clock, apply NOP and take CKE high.
Issue precharge command for all banks of the device.
Issue EMRS (Extended Mode Register Set) to enable DLL and establish Output Driver Type.
Issue MRS (Mode Register Set) to reset DLL and set device to idle with bit A8.
(An additional 200 cycles(min) of clock are required for DLL Lock before any executable
command applied.)
Issue precharge command for all banks of the device.
Issue two or more Auto Refresh commands.
Issue MRS-Initialize device operation with the reset DLL bit deactivated A8 to low.
maintain stable
for 200 µS min.
PREA
Inputs
t
DD
DDQ
RP
before or at the same time as V
Enable DLL
before or at the same time as V
EMRS
2 Clock min.
Initialization sequence after power-up
DLL reset with A8 = High
MRS
2 Clock min.
PREA
- 9 -
t
RP
DDQ
TT
AREF
.
and V
200 Clock min.
REF
t
Publication Release Date: Sep. 16, 2009
RFC
.
AREF
W9412G6IH
t
RFC
Disable DLL reset with A8 = Low
Revision A06
MRS
2 Clock min.
CMD
ANY