IS42S32200L-6TL 查看數據表（PDF） - Integrated Silicon Solution
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IS42S32200L-6TL
Integrated Silicon Solution
IS42S32200L-6TL Datasheet PDF : 60 Pages
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IS42S32200L, IS45S32200L
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)
HX XX
NO OPERATION (NOP/Continue previous operation)
LH HH
Idle
Any Command Otherwise Allowed to Bank m
XX XX
Row
ACTIVE (Select and activate row)
L L HH
Activating,
READ (Select column and start READ burst)(7)
LH LH
Active, or
WRITE (Select column and start WRITE burst)(7)
LH LL
Precharging
PRECHARGE
LL HL
Read
ACTIVE (Select and activate row)
L L HH
(Auto
READ (Select column and start new READ burst)(7,10)
LH LH
Precharge
WRITE (Select column and start WRITE burst)(7,11)
LH LL
Disabled)
PRECHARGE(9)
LL HL
Write
ACTIVE (Select and activate row)
L L HH
(Auto
READ (Select column and start READ burst)(7,12)
LH LH
Precharge
WRITE (Select column and start new WRITE burst)(7,13)
LH LL
Disabled)
PRECHARGE(9)
LL HL
Read
ACTIVE (Select and activate row)
L L HH
(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 LL
PRECHARGE(9)
LL HL
Write
ACTIVE (Select and activate row)
L L HH
(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 LL
PRECHARGE(9)
LL HL
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 previ-
ous 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). Excep-
tions 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 termi-
nated.
Write: A WRITE burst has been initiated, with auto precharge disabled, and has not yet terminated or been termi-
nated.
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.
7. READs or WRITEs to bank m listed in the Command (Action) column include READs or WRITEs with auto precharge enabled
and READs or WRITEs with auto precharge disabled.
Integrated Silicon Solution, Inc. — www.issi.com
11
Rev.A
10/17/2012
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