参数资料
型号: MT48LC1M16A1S
厂商: Micron Technology, Inc.
英文描述: SYNCHRONOUS DRAM
中文描述: 同步DRAM
文件页数: 9/51页
文件大小: 1480K
代理商: MT48LC1M16A1S
16Mb: x16 SDRAM
16MSDRAMx16.p65
Rev. 8/99
Micron Technology, Inc., reserves the right to change products or specifications without notice.
1999, Micron Technology, Inc.
9
16Mb: x16
SDRAM
TRUTH TABLE 1 – COMMANDS AND DQM OPERATION
(Notes: 1)
NAME (FUNCTION)
COMMAND INHIBIT (NOP)
NO OPERATION (NOP)
ACTIVE (Select bank and activate row)
READ (Select bank and column and start READ burst)
WRITE (Select bank and column and
start WRITE burst)
BURST TERMINATE
PRECHARGE (Deactivate row in bank or banks)
AUTO REFRESH or
SELF REFRESH (Enter self refresh mode)
LOAD MODE REGISTER
Write Enable/Output Enable
Write Inhibit/Output High-Z
CS# RAS# CAS# WE# DQM
H
X
X
L
H
H
L
L
H
L
H
L
L
H
L
ADDR
X
X
Bank/Row
DQs NOTES
X
X
X
X
X
H
H
H
L
X
X
X
3
4
4
L/H
8
Bank/Col
L/H
8
Bank/Col Valid
L
L
L
H
L
L
H
H
L
L
L
H
X
X
X
X
Active
X
X
Code
X
5
6, 7
L
L
L
L
X
L
H
Op-Code
X
2
8
8
Active
High-Z
following the Operation section; these tables provide
current state/next state information.
COMMANDS
Truth Table 1 provides a quick reference of available
commands. This is followed by a written description of
each command. Three additional Truth Tables appear
NOTE:
1. CKE is HIGH for all commands shown except SELF REFRESH.
2. A0-A10 and BA define the op-code written to the Mode Register.
3. A0-A10 provide row address, and BA determines which bank is made active.
4. A0-A7 provide column address; A10 HIGH enables the auto precharge feature (nonpersistent), while A10 LOW disables
the auto precharge feature; BA determines which bank is being read from or written to.
5. For A10 LOW, BA determines which bank is being precharged; for A10 HIGH, all banks are precharged and BA is a
Don
t Care.
6. This command is AUTO REFRESH if CKE is HIGH, SELF REFRESH if CKE is LOW.
7. Internal refresh counter controls row addressing; all inputs and I/Os are
Don
t Care
except for CKE.
8. Activates or deactivates the DQs during WRITEs (zero-clock delay) and READs (two-clock delay).
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