is43lr32200b-6bl Integrated Silicon Solution, Inc., is43lr32200b-6bl Datasheet - Page 17

• Manufacturer Part Number: is43lr32200b-6bl
• Description: 512k X 32bits X 4banks Mobile Ddr Sdram
• Manufacturer: Integrated Silicon Solution, Inc.

Rev. 00A | Feb. 2011
Table7 : Current State BANK
Note:
1. The table applies when both CKEn-1 and CKEn are HIGH, and after tXSR or tXP has been met if the previous state was Self Refresh or
2. DESELECT and NOP are functionally interchangeable.
3. All states and sequences not shown are illegal or reserved.
4. This command may or may not be bank specific. If all banks are being precharged, they must be in a valid state for precharging.
5. A command other than NOP should not be issued to the same bank while a READ or WRITE Burst with auto precharge is enabled.
6. The new Read or Write command could be auto precharge enabled or auto precharge disabled.
7. Current State Definitions:
8. The following states must not be interrupted by a command issued to the same bank.
Current State
(without Auto
(without Auto
Row Active
precharge)
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.
DESELECT or NOP commands or allowable commands to the other bank should be issued on any clock edge occurring during these
states. Allowable commands to the other bank are determined by its current state and Truth Table3, and according to Truth Table 4.
Power Down.
• Precharging: Starts with the registration of a PRECHARGE command and ends when tRP is met.
• Row Activating: Starts with registration of an ACTIVE command and ends when tRCD is met.
• Read with AP Enabled: Starts with the registration of the READ command with AUTO PRECHARGE enabled and ends when tRP has
• Write with AP Enabled: Starts with registration of a WRITE command with AUTO PRECHARGE enabled and ends when tRP has been
recharge)
Write
Read
Any
Idle
Once tRP is met, the bank will be in the idle state.
Once tRCD is met, the bank will be in the ''row active'' state.
/CS
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
been met. Once tRP has been met, the bank will be in the idle state.
met. Once tRP is met, the bank will be in the idle state.
/RAS
H
H
H
H
H
H
H
H
X
L
L
L
L
L
L
L
n
Truth Table(COMMAND TO BANK
/CAS
H
H
H
H
H
H
H
X
L
L
L
L
L
L
L
L
Command
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/WE
X
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
DESELECT(NOP)
NOP
ACTIVE
AUTO REFRESH
MODE REGISTER
SET
PRECHARGE
READ
WRITE
PRECHARGE
READ
WRITE
PRECHARGE
BURST TERMINATE
READ
WRITE
PRECHARGE
Description
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n
)
Continue previous Operation
Continue previous Operation
Select and activate row
Auto refresh
Mode register set
No action if bank is idle
Select Column & start read burst
Select Column & start write burst
Deactivate Row in bank (or banks)
Truncate Read & start new Read burst
Truncate Read & start new Write burst
Truncate Read, start Precharge
Burst terminate
Truncate Write & start new Read burst
Truncate Write & start new Write burst
Truncate Write, start Precharge
Action
IS43/46LR32200B
Advanced Information
5,6,13
5,6,12
Note
5,6
5,6
10
10
11
12
4
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