MT48V4M32LFF5-8:G Micron Technology Inc, MT48V4M32LFF5-8:G Datasheet - Page 41

• Manufacturer Part Number: MT48V4M32LFF5-8:G
• Description: IC SDRAM 128MBIT 125MHZ 90VFBGA
• Manufacturer: Micron Technology Inc

Specifications of MT48V4M32LFF5-8:G

• Format - Memory: RAM
• Memory Type: Mobile SDRAM
• Memory Size: 128M (4Mx32)
• Speed: 125MHz
• Interface: Parallel
• Voltage - Supply: 2.3 V ~ 2.7 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 90-VFBGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Burst Read/Single Write
Figure 30:
CONCURRENT Auto Precharge
READ with Auto Precharge
PDF: 09005aef807f4885/Source: 09005aef8071a76b
128Mbx16x32Mobile_2.fm - Rev. M 1/09 EN
Clock Suspend During READ Burst
Notes:
The burst read/single write mode is entered by programming the write burst mode bit
(M9) in the mode register to a logic 1. In this mode, all WRITE commands result in the
access of a single column location (burst of 1), regardless of the programmed burst
length. READ commands access columns according to the programmed burst length
and sequence, just as in the normal mode of operation (M9 = 0).
COMMAND
1. For this example, CL = 2, BL = 4 or greater, and DQM is LOW.
An access command (READ or WRITE) to another bank while an access command with
auto precharge enabled is executing is not allowed by SDRAMs, unless the SDRAM
supports concurrent auto precharge. Micron SDRAMs support concurrent auto
precharge. Four cases where concurrent auto precharge occurs are defined below.
• Interrupted by a READ (with or without auto precharge): A READ to bank m will inter-
• Interrupted by a WRITE (with or without auto precharge): A WRITE to bank m will
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 (Figure 31 on page 42).
interrupt a READ on bank n when registered. DQM should be used 2 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 (Figure 32 on page 42).
CLOCK
CLK
CKE
DQ
T0
BANK,
COL n
READ
T1
NOP
T2
NOP
41
D
OUT
n
TRANSITIONING DATA
T3
Micron Technology, Inc., reserves the right to change products or specifications without notice.
n + 1
D
OUT
T4
NOP
128Mb: x16, x32 Mobile SDRAM
T5
NOP
n + 2
D
OUT
DON’T CARE
T6
NOP
D
n + 3
OUT
©2001 Micron Technology, Inc. All rights reserved.
READs