mt48lc2m32b2 Micron Semiconductor Products, mt48lc2m32b2 Datasheet - Page 51

• Manufacturer Part Number: mt48lc2m32b2
• Description: Synchronous Dram
• Manufacturer: Micron Semiconductor Products

Timing Diagrams
Figure 33:
PDF: 09005aef811ce1fe/Source: 09005aef811ce1d5
64MSDRAMx32_2.fm - Rev. J 12/08 EN
COMMAND
DQM 0–3
BA0, BA1
A0–A9
CKE
A10
CLK
DQ
T = 100µs
(
(
(
)
(
(
(
(
(
)
(
)
(
)
(
)
(
)
(
)
)
Power-up:
V
CK stable
(
)
)
)
)
)
(
)
)
(
(
(
(
(
(
(
)
(
)
(
)
(
)
(
)
(
(MIN)
)
)
(
)
)
)
)
)
)
DD
Initialize and Load Mode Register
and
t CKS
t CMS
T0
Notes:
NOP
t CKH
t CMH
High-Z
SINGLE BANK
t CMS
ALL BANKS
t CK
1. The mode register may be loaded prior to the AUTO REFRESH cycles if desired.
2. Outputs are guaranteed High-Z after command is issued.
PRECHARGE
BANKS
T1
ALL
t CMH
t RP
Precharge
all banks
(
(
(
(
(
(
(
)
)
)
)
)
)
)
(
(
(
(
(
(
(
(
)
)
)
)
)
)
)
)
(
(
(
(
(
(
(
(
(
)
(
)
(
)
(
)
(
)
(
)
(
)
)
)
)
)
)
)
)
)
t CMS
Tn + 1
REFRESH
AUTO
t CMH
t CH
AUTO REFRESH
t RFC
NOP
(
(
(
(
(
(
(
(
)
(
)
(
)
(
)
(
)
(
)
)
)
)
)
)
)
)
(
(
(
(
(
(
(
(
)
(
)
(
)
(
)
(
)
(
)
)
)
)
)
)
)
)
NOP
51
t CL
To + 1
REFRESH
AUTO
AUTO REFRESH
Micron Technology, Inc., reserves the right to change products or specifications without notice.
t RFC
NOP
(
(
(
(
(
(
(
(
)
(
)
(
)
(
)
(
)
(
)
)
)
)
)
)
)
)
(
(
(
(
(
(
(
(
)
(
)
(
)
(
)
(
)
(
)
)
)
)
)
)
)
)
NOP
t AS
t AS
t AS
LOAD MODE
Tp + 1
REGISTER
CODE
CODE
CODE
t AH
t AH
t AH
Program Mode Register
©2001 Micron Technology, Inc. All rights reserved.
64Mb: x32 SDRAM
t MRD
Tp + 2
Timing Diagrams
NOP
1, 2
Tp + 3
ACTIVE
BANK
ROW
ROW
DON’T CARE
UNDEFINED