mt46h8m16lfcf-75-it Micron Semiconductor Products, mt46h8m16lfcf-75-it Datasheet - Page 38

• Manufacturer Part Number: mt46h8m16lfcf-75-it
• Description: 128mb Mobile Ddr Sdram Mt46h4m32lfb5-6
• Manufacturer: Micron Semiconductor Products

Figure 14:
PDF: 09005aef8331b3e9 / Source: 09005aef8331b3ce
ddr_mobile_sdram_cmd_op_timing_dia_fr5.08__3.fm - Rev. B 06/08 EN
ACT = ACTIVE
AREF = AUTO REFRESH
BST = BURST TERMINATE
CKEH = Exit power-down
CKEL = Enter power-down
DPD = Enter deep power-down
Mobile DRAM Simplified State Diagram
applied
Power
WRITE
LMR
PRE
PREALL
Power
PRE
EMR
LMR
WRITE A
on
power-
WRITE
WRITE
Active
down
w/AP
DPDX = Exit deep power-down
EMR = LOAD EXTENDED MODE REGISTER
LMR = LOAD MODE REGISTER
PRE = PRECHARGE
PREALL = PRECHARGE all banks
READ = READ w/o auto precharge
DPDX
WRITE
LMR
CKEL
power-
down
Deep
WRITE A
WRITE A
CKEH
PRE
DPD
precharged
Precharge
all banks
active
38
Row
ACT
PRE
Idle
SREF
READ A
WRITE
READ
CKEH
refresh
READ A
PRE
Self
SREFX
Micron Technology, Inc., reserves the right to change products or specifications without notice.
SRR
CKEL
128Mb: x16, x32 Mobile DDR SDRAM
READ
Precharge
AREF
power-
down
terminate
BST
READ
READ
Burst
w/AP
SRR
READ A
READ A = READ w/ auto precharge
SREF = Enter self refresh
SREFX = Exit self refresh
SRR = STATUS REGISTER READ
WRITE = WRITE w/o auto precharge
WRITE A = WRITE w/ auto precharge
refresh
Automatic sequence
Command sequence
Auto
READ
READ
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READ
Operations
Preliminary