HYB18L128160BF Datasheet, PDF (43/55 Pages) Infineon Technologies AG – DRAMs for Mobile Applications

HY[B/E]18L128160B[C/F]-7.5
128-Mbit Mobile-RAM
Functional DescriptionFunction Truth Tables
Table 16 Current State Bank n - Command to Bank m (different bank)
Current State CS RAS CAS WE Command / Action
Notes
Any
H X X X DESELECT (NOP / continue previous operation)
1)2)3)4)5)6)
L H H H NO OPERATION (NOP / continue previous operation) ^to
Idle
X X X X Any command otherwise allowed to bank n
to
Row
L L H H ACTIVE (select and activate row)
to
Activating,
L H L H READ (select column and start READ burst)
to 7)
Active, or
L H L L WRITE (select column and start WRITE burst)
to
Precharging
L L H L PRECHARGE (deactivate row in bank or banks)
to
Read (Auto- L L H H ACTIVE (select and activate row)
to
Precharge
L H L H READ (select column and start READ burst)
to
Disabled)
L H L L WRITE (select column and start WRITE burst)
to 8)
L L H L PRECHARGE (deactivate row in bank or banks)
to
Write (Auto- L L H H ACTIVE (select and activate row)
to
Precharge
L H L H READ (select column and start READ burst)
to
Disabled)
L H L L WRITE (select column and start WRITE burst)
to
L L H L PRECHARGE (deactivate row in bank or banks)
to
Read
L L H H ACTIVE (select and activate row)
to
(with Auto- _{L H L H READ (select column and start READ burst)}
to , 9)
Precharge) _{L H L L WRITE (select column and start WRITE burst)}
to
L L H L PRECHARGE (deactivate row in bank or banks)
to
Write
L L H H ACTIVE (select and activate row)
to
(with Auto- _{L H L H READ (select column and start READ burst)}
to ,
Precharge) _{L H L L WRITE (select column and start WRITE burst)}
to ,
L L H L PRECHARGE (deactivate row in bank or banks)
to
1) This table applies when CKEn-1 was HIGH and CKEn is HIGH and after t_RC 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 t_RP has been met.
Row Active:A row in the bank has been activated, and t_RCD 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 with AP
Enabled:Starts with registration of a READ command with Auto Precharge enabled and ends when t_RP has been
met. Once t_RP is met, the bank is in the idle state.
Write with AP
Enabled:Starts with registration of a WRITE command with Auto Precharge enabled and ends when t_RP has been
met. Once t_RP is met, the bank is in the idle state.
4) AUTO REFRESH, SELF REFRESH and MODE REGISTER SET 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.
Data Sheet
43
Rev. 1.71, 2007-01
05282004-NZNK-8T0D