mt48h16m16lfbf-75 Micron Semiconductor Products, mt48h16m16lfbf-75 Datasheet - Page 36

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

Concurrent Auto Precharge
READ with Auto Precharge
Figure 27: Clock Suspend During WRITE Burst
PDF:09005aef8219eeeb/Source: 09005aef8219eedd
256mb_x16_sdram_y36m_1.fm - Rev G 2/08 EN
Note:
1. Interrupted by a READ (with or without auto precharge): A READ to bank m will inter-
2. Interrupted by a WRITE (with or without auto precharge): A WRITE to bank m will
An access command (READ or WRITE) to a second bank while an access command with
auto precharge enabled on a first bank is executing is not allowed by SDRAM, unless the
SDRAM supports concurrent auto precharge. Micron SDRAM support concurrent auto
precharge. Four cases where concurrent auto precharge occurs are defined in the “READ
with Auto Precharge” and “WRITE with Auto Precharge” sections.
COMMAND
INTERNAL
ADDRESS
rupt a READ on bank n, CL later. The precharge to bank n will begin when the READ
to bank m is registered (see Figure 29 on page 37).
interrupt a READ on bank n when registered. DQM should be used two clocks prior to
the WRITE command to prevent bus contention. The precharge to bank n will begin
when the WRITE to bank m is registered (see Figure 30 on page 38).
CLOCK
For this example, BL = 4 or greater, and DM is LOW.
CLK
CKE
D
IN
NOP
T0
WRITE
BANK,
COL n
T1
D
n
IN
T2
36
T3
Micron Technology, Inc., reserves the right to change products or specifications without notice.
NOP
n + 1
T4
D
IN
256Mb: x16, x32 Mobile SDRAM
DON’T CARE
T5
NOP
n + 2
D
IN
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Operations