mt48h16m16lfbf-75 Micron Semiconductor Products, mt48h16m16lfbf-75 Datasheet - Page 57

• Manufacturer Part Number: mt48h16m16lfbf-75
• Description: 256mb X16, X32 Mobile Sdram
• Manufacturer: Micron Semiconductor Products

Figure 37: Auto Refresh Mode
PDF:09005aef8219eeeb/Source: 09005aef8219eedd
256mb_x16_sdram_y36m_1.fm - Rev G 2/08 EN
COMMAND
BA0, BA1
ADDR
DQM
A10
CKE
CLK
DQ
High-Z
Notes:
Precharge all
t CKS
active banks
t CMS
t AS
SINGLE BANK
PRECHARGE
ALL BANKS
BANK(S)
T0
t AH
t CKH
t CMH
t CK
1. Each AUTO REFRESH command performs a REFRESH cycle. Back-to-back commands are not
required.
See Table 11 on page 46.
t RP
T1
NOP
T2
REFRESH
AUTO
t CH
t RFC
NOP
57
(
(
(
(
(
(
(
)
(
)
(
)
(
)
)
(
(
)
)
)
)
(
)
(
)
(
)
(
(
(
(
)
(
)
(
)
)
)
)
)
)
(
(
(
(
(
)
)
)
)
(
(
)
)
(
(
)
(
(
)
)
)
)
)
NOP
Micron Technology, Inc., reserves the right to change products or specifications without notice.
t CL
Tn + 1
REFRESH
AUTO
256Mb: x16, x32 Mobile SDRAM
t RFC
DON’T CARE
NOP
(
(
(
(
(
)
(
(
(
(
)
(
)
(
)
)
)
(
)
)
)
)
)
(
(
)
)
(
(
(
(
(
)
(
)
(
(
(
)
(
)
(
)
)
)
)
)
)
)
(
(
)
)
(
)
)
NOP
©2006 Micron Technology, Inc. All rights reserved
Timing Diagrams
To + 1
ACTIVE
ROW
ROW
BANK
UNDEFINED