HYB18L128160BF Datasheet, PDF (45/53 Pages) Infineon Technologies AG – DRAMs for Mobile Applications

HY[B/E]18L128160B[C/F]-7.5
128-Mbit Mobile-RAM
Functional Description
Table 15 Current State Bank n - Command to Bank m (different bank) (cont’d)
Current State CS RAS CAS WE Command / Action
Idle
X X X X Any command otherwise allowed to bank n
Row Activating, L L H H ACTIVE (select and activate row)
Active, or
Precharging
L H L H READ (select column and start READ burst)
L H L L WRITE (select column and start WRITE burst)
L L H L PRECHARGE (deactivate row in bank or banks)
Read (Auto-
Precharge
Disabled)
L L H H ACTIVE (select and activate row)
L H L H READ (select column and start READ burst)
L H L L WRITE (select column and start WRITE burst)
L L H L PRECHARGE (deactivate row in bank or banks)
Write (Auto-
Precharge
Disabled)
L L H H ACTIVE (select and activate row)
L H L H READ (select column and start READ burst)
L H L L WRITE (select column and start WRITE burst)
L L H L PRECHARGE (deactivate row in bank or banks)
Read
(with Auto-
Precharge)
L L H H ACTIVE (select and activate row)
L H L H READ (select column and start READ burst)
L H L L WRITE (select column and start WRITE burst)
L L H L PRECHARGE (deactivate row in bank or banks)
Write
(with Auto-
Precharge)
L L H H ACTIVE (select and activate row)
L H L H READ (select column and start READ burst)
L H L L WRITE (select column and start WRITE burst)
L L H L PRECHARGE (deactivate row in bank or banks)
Notes
1) to 6)
1) to 6)
1) to 7)
1) to 7)
1) to 6)
1) to 6)
1) to 7)
1) to 8)
1) to 6)
1) to 6)
1) to 7)
1) to 7)
1) to 6)
1) to 6)
1) to 7), 9)
1) to 9)
1) to 6)
1) to 6)
1) to 7), 9)
1) to 7), 9)
1) to 6)
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:
Row Active:
The bank has been precharged, and t_RP has been met.
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:
Write with AP
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.
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.
7) READs or WRITEs listed in the Command/Action column include READs or WRITEs with Auto Precharge enabled and
READs or WRITEs with Auto Precharge disabled.
8) Requires appropriate DQM masking.
Data Sheet
45
V1.4, 2004-04-30