IS43R16320E Datasheet, PDF (10/33 Pages) Integrated Silicon Solution, Inc – Auto Refresh and Self Refresh Modes

IS43R86400E
IS43/46R16320E, IS43/46R32160E
COMMANDS TRUTH TABLES
All commands (address and control signals) are registered on the positive edge of clock (crossing of CK going high
and CK going low). Truth Table shows basic timing parameters for all commands.
TRUTH TABLE - COMMANDS
NAME (FUNCTION)
CS RAS CAS WE BA
DESELECT (NOP)
H
X
X
X
X
NO OPERATION (NOP)
L
H HHX
ACTIVE (select bank and activate row)
L
L
H
H Valid
READ (select bank and column and start read
L
H
L H Valid
burst)
READ with AP (read burst with Auto Precharge) L
H
L H Valid
WRITE (select bank and column and start write L
H
L
L Valid
burst)
WRITE with AP (write burst with Auto
Precharge)
L
H
L
L Valid
BURST TERMINATE
L
HHL
X
PRECHARGE (deactivate row in selected
bank)
L
L
H L Valid
PRECHARGE ALL (deactivate rows in all
banks)
L
L
H
L
X
AUTO REFRESH or enter SELF REFRESH
L
L
LHX
MODE REGISTER SET
L
L
L
L Valid
AP Address Notes
X
X
2
X
X
2
X
Row
L
Column
H
Column 3
L
Column
H
Column 3
X
X
4
L
X
5
H
X
5
X
X
Op-code
6,7,8
9
Notes:
1. All states and sequences not shown are illegal or reserved.
2. DESELECT and NOP are functionally interchangeable.
3. Autoprecharge is non-persistent. AP High enables Auto Precharge, while AP Low disables Autoprecharge.
4. Burst Terminate applies to only Read bursts with Auto Precharge disabled. This command is undefined and should not be
used for Read with Auto Precharge enabled, and for Write bursts.
5. If AP is Low, bank address determines which bank is to be precharged. If AP is High, all banks are precharged and BA0-
BA1are don’t care.
6. This command is AUTO REFRESH if CKE is High, and SELF REFRESH if CKE is low.
7. All address inputs and I/O are ‘don't care’ except for CKE. Internal refresh counters control bank and row addressing.
8. All banks must be precharged before issuing an AUTO-REFRESH or SELF REFRESH command.
9. BA0 and BA1 value select between MRS and EMRS.
10. CKE is HIGH for all commands shown except SELF REFRESH.
TRUTH TABLE - DM Operations
FUNCTION
DM
DQ
Write Enable
L
Valid
Write Inhibit
H
X
Note: Used to mask write data, provided coincident with the
corresponding data.
ADDRESSING
x32
Auto Precharge (AP)
A8
Row Address (RA) A0-A12
Column Address (CA) A0-A7,
A9
x16
A10
A0-A12
A0-A9
x8
A10
A0-A12
A0-A9,
A11
10
Integrated Silicon Solution, Inc.
Rev. 00A
10/24/13