IS45S32200L-7BA1 查看數據表（PDF） - Integrated Device Technology
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IS45S32200L-7BA1
Integrated Device Technology
IS45S32200L-7BA1 Datasheet PDF : 59 Pages
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IS42S32200L, IS45S32200L
TRUTH TABLE – CKE (1-4)
CURRENT STATE
Power-Down
Self Refresh
Clock Suspend
Power-Down(5)
Self Refresh(6)
Clock Suspend(7)
All Banks Idle
All Banks Idle
Reading or Writing
COMMANDn
X
X
X
COMMAND INHIBIT or NOP
COMMAND INHIBIT or NOP
X
COMMAND INHIBIT or NOP
AUTO REFRESH
VALID
ACTIONn
Maintain Power-Down
Maintain Self Refresh
Maintain Clock Suspend
Exit Power-Down
Exit Self Refresh
Exit Clock Suspend
Power-Down Entry
Self Refresh Entry
Clock Suspend Entry
CKEn-1
L
L
L
L
L
L
H
H
H
CKEn
L
L
L
H
H
H
L
L
L
See TRUTH TABLE – CURRENT STATE BANK n, COMMAND TO BANK n
H
H
NOTES:
1. CKEn is the logic state of CKE at clock edge n; CKEn-1 was the state of CKE at the previous clock edge.
2. Current state is the state of the SDRAM immediately prior to clock edge n.
3. COMMANDn is the command registered at clock edge n, and ACTONn is a result of COMMANDn.
4. All states and sequences not shown are illegal or reserved.
5. Exiting power-down at clock edge n will put the device in the all banks idle state in time for clock edge n+1 (provided that tcks is
met).
6. Exiting self refresh at clock edge n will put the device in all banks idle state once txsr is met. COMMAND INHIBIT or NOP
commands should be issued on clock edges occurring during the txsr period. A minimum of two NOP commands must be sent
during txsr period.
7. After exiting clock suspend at clock edge n, the device will resume operation and recognize the next command at clock edge
n+1.
TRUTH TABLE – CURRENT STATE BANK n, COMMAND TO BANK n (1-6)
CURRENT STATE
Any
Idle
Row Active
Read
(Auto
Precharge
Disabled)
Write
(Auto
Precharge
Disabled)
COMMAND (ACTION)
COMMAND INHIBIT (NOP/Continue previous operation)
NO OPERATION (NOP/Continue previous operation)
ACTIVE (Select and activate row)
AUTO REFRESH(7)
LOAD MODE REGISTER(7)
PRECHARGE(11)
READ (Select column and start READ burst)(10)
WRITE (Select column and start WRITE burst)(10)
PRECHARGE (Deactivate row in bank or banks)(8)
READ (Select column and start new READ burst)(10)
WRITE (Select column and start WRITE burst)(10)
PRECHARGE (Truncate READ burst, start PRECHARGE)(8)
BURST TERMINATE(9)
READ (Select column and start READ burst)(10)
WRITE (Select column and start new WRITE burst)(10)
PRECHARGE (Truncate WRITE burst, start PRECHARGE)(8)
BURST TERMINATE(9)
CS RAS CAS WE
HX XX
LH HH
L L HH
LL LH
LL LL
LL HL
LH LH
LH LL
LL HL
LH LH
LH LL
LL HL
LH HL
LH LH
LH LL
LL HL
LH HL
NOTE:
1. This table applies when CKE n-1 was HIGH and CKE n is HIGH (see Truth Table - CKE) and after txsr has been met (if the
previous state was SELF REFRESH).
2. This table is bank-specific, except where noted; i.e., the current state is for a specific bank and the commands shown are those
allowed to be issued to that bank when in that state. Exceptions are covered in the notes below.
Integrated Silicon Solution, Inc. — www.issi.com
9
Rev.A
10/17/2012
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