GS4576C09/18/36L
Power–Up Initialization Sequence
VEXT
VDD
VDDQ
VREF
VTT
Refresh
All Banks(5)
200us Min
Mode Initialization
tMRSC
1024 Cycles NOP Cycles Min
tCK
tDK
tCKH
tDKH
tCKL
tDKL
CK
CK
DK
DK
Command
ADDR
BA
NOP
NOP
MRS
MRS
MRS
NOP
AREF
AREF
NOP
AC
CODE(1,2)
CODE(1,2)
CODE(2)
ADDR
Valid
Bank 0
Bank 7
DM
DQ
Notes:
1. Recommend all address pins held Low during dummy MRS commands.
2. A10–A17 must be Low.
3. DLL must be reset if tCK or VDD are changed.
4. CK and CK must be separated at all times to prevent bogus commands from being issued.
5. The sequence of the eight AUTO REFRESH commands (with respect to the 1024 NOP commands) does not matter. As is required for any operation,
tRC must be met between an AUTO REFRESH command and a subsequent VALID command to the same bank.
Rev: 1.04 11/2013
8/62
© 2011, GSI Technology
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
GSI [ GSI TECHNOLOGY ]
