MT48LC8M16LFB4-8 Micron Technology Inc, MT48LC8M16LFB4-8 Datasheet - Page 38

• Manufacturer Part Number: MT48LC8M16LFB4-8
• Manufacturer: Micron Technology Inc
• Type: Mobile SDRAMr

Specifications of MT48LC8M16LFB4-8

• Organization: 8Mx16
• Density: 128Mb
• Address Bus: 14b
• Access Time (max): 19/8/7ns
• Maximum Clock Rate: 125MHz
• Operating Supply Voltage (typ): 3.3V
• Package Type: VFBGA
• Operating Temp Range: 0C to 70C
• Operating Supply Voltage (max): 3.6V
• Operating Supply Voltage (min): 3V
• Supply Current: 100mA
• Pin Count: 54
• Mounting: Surface Mount
• Operating Temperature Classification: Commercial
• Lead Free Status / Rohs Status: Compliant

Figure 27:
PRECHARGE
POWER-DOWN
PDF: 09005aef807f4885/Source: 09005aef8071a76b
128Mbx16x32Mobile_2.fm - Rev. L 10/07 EN
PRECHARGE Command
BA0, BA1
The PRECHARGE command (see Figure 27) is used to deactivate the open row in a
particular bank or the open row in all banks. The bank(s) will be available for a subse-
quent row access some specified time (
Input A10 determines whether one or all banks are to be precharged, and in the case
where only one bank is to be precharged, inputs BA0, BA1 select the bank. When all
banks are to be precharged, inputs BA0, BA1 are treated as “Don’t Care.” After a bank has
been precharged, it is in the idle state and must be activated prior to any READ or WRITE
commands being issued to that bank.
Power-down occurs if CKE is registered low coincident with a NOP or COMMAND
INHIBIT when no accesses are in progress. If power-down occurs when all banks are
idle, this mode is referred to as precharge power-down; if power-down occurs when
there is a row active in any bank, this mode is referred to as active power-down. Entering
power-down deactivates the input and output buffers, excluding CKE, for maximum
power savings while in standby. The device may not remain in the power-down state
longer than the refresh period (64ms) since no refresh operations are performed in this
mode.
The power-down state is exited by registering a NOP or COMMAND INHIBIT and CKE
HIGH at the desired clock edge (meeting
A0-A9
RAS#
CAS#
WE#
CKE
CLK
A10
CS#
HIGH
VALID ADDRESS
Bank Selected
All Banks
ADDRESS
BANK
38
DON’T CARE
Micron Technology, Inc., reserves the right to change products or specifications without notice.
t
RP) after the precharge command is issued.
t
CKS). See Figure 28 on page 39.
128Mb: x16, x32 Mobile SDRAM
©2001 Micron Technology, Inc. All rights reserved.
READs