參數(shù)資料
型號(hào)： 5962D1022901QXC
元件分類(lèi)： DRAM
英文描述： 64M X 40 SYNCHRONOUS DRAM, 5.4 ns, CQFP128
封裝： CERAMIC, QFP-128
文件頁(yè)數(shù)： 35/68頁(yè)
文件大?。?/td> 1475K
代理商： 5962D1022901QXC
40
Notes:
1. This table applies when CKEn - 1 was HIGH and CKEn is HIGH (see Table 6) and after tXSR has been met.
2. This table describes alternate bank operation, except where noted; that is, the current state is for bank n and the commands shown are those allowed to be issued to
bank m (assuming that bank m is in such a state that the given command is allowable). Exceptions are covered in the notes below.
3. Current state definitions:
Idle: The bank has been precharged, and tRP has been met.
active: A row in the bank has been activated, and tRCD has been met. No data bursts/accesses and no register accesses are in progress.
Read: A READ burst has been initiated, with auto precharge disabled, and has not yet terminated or been terminated.
Write: A WRITE burst has been initiated, with auto precharge disabled, and has not yet terminated or been terminate
Read with auto Starts with registration of a READ command with auto precharge enabled, and ends when tRP has been met. After tRP is met, the precharge
enabled: bank will be in the idle state.
Write with autoStarts with registration of a WRITE command with auto precharge enabled, and ends when tRP has been met. After tRP is met, the
precharge enabled: bank will be in the idle state.
Table 8: Truth Table 4 - Current State Bank n, Command to Bank m
Current
State
CS#
RAS# CAS#
WE#
Command (Action)
Notes
Any
H
X
COMMAND INHIBIT (NOP/continue previous operation)
L
H
NO OPERATION (NOP/continue previous operation)
Idle
X
Any Command Otherwise Allowed to Bank m
Row
activating,
active, or
precharging
L
H
ACTIVE (Select and activate row)
L
H
L
H
READ (Select column and start READ burst)
7
L
H
L
WRITE (Select column and start WRITE burst)
7
L
H
L
PRECHARGE
Read (auto
precharge
disabled)
L
H
ACTIVE (Select and activate row)
L
H
L
H
READ (Select column and start new READ burst)
7, 10
L
H
L
WRITE (Select column and start WRITE burst)
7, 11
L
H
L
PRECHARGE
9
Write (auto
precharge
disabled)
L
H
ACTIVE (Select and activate row)
L
H
L
H
READ (Select column and start READ burst)
7, 12
L
H
L
WRITE (Select column and start new WRITE burst)
7, 13
L
H
L
PRECHARGE
9
Read (with
auto
precharge)
L
H
ACTIVE (Select and activate row)
L
H
L
H
READ (Select column and start new READ burst)
7, 8, 14
L
H
L
WRITE (Select column and start WRITE burst)
7, 8, 15
L
H
L
PRECHARGE
9
Write (with
auto
precharge)
L
H
ACTIVE (Select and activate row)
L
H
L
H
READ (Select column and start READ burst)
7, 8, 16
L
H
L
WRITE (Select column and start new WRITE burst)
7, 8, 17
L
H
L
PRECHARGE
9
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