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IS45S32200C1-7TA1 Datasheet(PDF) 11 Page - Integrated Silicon Solution, Inc

Part # IS45S32200C1-7TA1
Description  512K Bits x 32 Bits x 4 Banks (64-MBIT) SYNCHRONOUS DYNAMIC RAM
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Manufacturer  ISSI [Integrated Silicon Solution, Inc]
Direct Link  http://www.issi.com
Logo ISSI - Integrated Silicon Solution, Inc

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IS45S32200C1
ISSI®
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
11
Rev. B
05/18/06
TRUTH TABLE – CURRENT STATE BANK
n, COMMAND TO BANK m (1-6)
CURRENT STATE
COMMAND (ACTION)
CS RAS CAS WE
Any
COMMAND INHIBIT (NOP/Continue previous operation)
H
X
X
X
NO OPERATION (NOP/Continue previous operation)
L
H
H
H
Idle
Any Command Otherwise Allowed to Bank
m
XX
XX
Row
ACTIVE (Select and activate row)
L
L
H
H
Activating,
READ (Select column and start READ burst)(7)
LH
LH
Active, or
WRITE (Select column and start WRITE burst)(7)
LH
L
L
Precharging
PRECHARGE
L
L
H
L
Read
ACTIVE (Select and activate row)
L
L
H
H
(Auto
READ (Select column and start new READ burst)(7,10)
LH
LH
Precharge
WRITE (Select column and start WRITE burst)(7,11)
LH
L
L
Disabled)
PRECHARGE(9)
LL
H
L
Write
ACTIVE (Select and activate row)
L
L
H
H
(Auto
READ (Select column and start READ burst)(7,12)
LH
LH
Precharge
WRITE (Select column and start new WRITE burst)(7,13)
LH
L
L
Disabled)
PRECHARGE(9)
LL
H
L
Read
ACTIVE (Select and activate row)
L
L
H
H
(With Auto
READ (Select column and start new READ burst)(7,8,14)
LH
LH
Precharge)
WRITE (Select column and start WRITE burst)(7,8,15)
LH
L
L
PRECHARGE(9)
LL
H
L
Write
ACTIVE (Select and activate row)
L
L
H
H
(With Auto
READ (Select column and start READ burst)(7,8,16)
LH
LH
Precharge)
WRITE (Select column and start new WRITE burst)(7,8,17)
LH
L
L
PRECHARGE(9)
LL
H
L
NOTE:
1. This table applies when CKE n-1 was HIGH and CKE n is HIGH (Truth Table - CKE) and after tXSR has been met (if the previous
state was self refresh).
2. This table describes alternate bank operation, except where noted; i.e., 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.
Row 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 terminated.
Read w/Auto
Precharge Enabled: Starts with registration of a READ command with auto precharge enabled, and ends when tRP has been met.
Once tRP is met, the bank will be in the idle state.
Write w/Auto
Precharge Enabled: Starts with registration of a WRITE command with auto precharge enabled, and ends when tRP has been
met. Once tRP is met, the bank will be in the idle state.
4. AUTO REFRESH, SELF REFRESH and LOAD MODE REGISTER commands may only be issued when all banks are idle.
5. A BURST TERMINATE command cannot be issued to another bank; it applies to the bank represented by the current state only.
6. All states and sequences not shown are illegal or reserved.


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