MT48H16M16LF MICRON [Micron Technology], MT48H16M16LF Datasheet - Page 36

• Manufacturer Part Number: MT48H16M16LF
• Description: 256Mb: 16 Meg x 16, 8 Meg x 32 Mobile SDRAM
• Manufacturer: MICRON [Micron Technology]

Concurrent Auto Precharge
READ with Auto Precharge
Figure 27:
PDF:09005aef8219eeeb/Source: 09005aef8219eedd
MT48H16M16LF_2.fm - Rev F 4/07 EN
Clock Suspend During WRITE Burst
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
256Mb: 16 Meg x 16, 8 Meg x 32 Mobile SDRAM
T2
36
T3
Micron Technology, Inc., reserves the right to change products or specifications without notice.
NOP
n + 1
T4
D
IN
DON’T CARE
T5
n + 2
NOP
D
IN
©2006 Micron Technology, Inc. All rights reserved.
Operations