mt48h8m16lf Micron Semiconductor Products, mt48h8m16lf Datasheet - Page 70
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mt48h8m16lf
Manufacturer Part Number
mt48h8m16lf
Description
128mb 8 Meg X 16, 4 Meg X 32 Mobile Sdram
Manufacturer
Micron Semiconductor Products
Datasheet
1.MT48H8M16LF.pdf
(74 pages)
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Clock Suspend
Figure 50:
PDF: 09005aef832ff1ea / Source: 09005aef832ff1ac
sdr_mobile_sdram_cmd_op_timing_dia_fr5.08__4.fm - Rev. B 6/08 EN
Clock Suspend During WRITE Burst
Notes:
The clock suspend mode occurs when a column access/burst is in progress and CKE is
registered LOW. In the clock suspend mode, the internal clock is deactivated, “freezing”
the synchronous logic.
For each positive clock edge on which CKE is sampled LOW, the next internal positive
clock edge is suspended. Any command or data present on the input balls at the time of
a suspended internal clock edge is ignored; any data present on the DQ balls remains
driven; and burst counters are not incremented, as long as the clock is suspended (see
examples in Figure 50 and Figure 51 on page 71).
Clock suspend mode is exited by registering CKE HIGH; the internal clock and related
operation will resume on the subsequent positive clock edge.
1. For this example, BL = 4 or greater, and DQM is LOW.
Command
Internal
Address
clock
CKE
CLK
D
IN
NOP
T0
WRITE
Bank,
Col n
T1
D
n
IN
128Mb: 8 Meg x 16, 4 Meg x 32 Mobile SDRAM
70
T2
Micron Technology, Inc., reserves the right to change products or specifications without notice.
T3
NOP
n + 1
T4
D
IN
Don’t Care
T5
n + 2
NOP
D
IN
©2008 Micron Technology, Inc. All rights reserved.
Timing Diagrams
Preliminary