IS42G32256 Datasheet, PDF (27/52 Pages) Integrated Silicon Solution, Inc – 256K x 32 x 2 (16-Mbit) SYNCHRONOUS GRAPHICS RAM

IS42G32256
ISSI ^®
Table 14. Function Truth Table (continued)
Current
State CS RAS CAS WE DSF
Row H X X X X
Activating L H H H X
LHHL X
LHLXX
L LHHX
L LHLX
L L LXX
Refreshing H X X X X
L HHX X
LHLXX
L LHXX
L L LXX
BA
(A10)
X
X
X
BA
BA
BA
X
X
X
X
X
X
ADDR
X
X
X
CA,AP
RA
PA
X
X
X
X
X
X
Action
NOP → Row Active after tRCD
NOP → Row Active after tRCD
ILLEGAL⁽²⁾
ILLEGAL⁽²⁾
ILLEGAL⁽²⁾
ILLEGAL⁽²⁾
ILLEGAL⁽²⁾
NOP → Idle after tRC
NOP → Idle after tRC
ILLEGAL
ILLEGAL
ILLEGAL
Abbreviations:
RA = Row Address (A0-A9)
NOP = No Operation Command
BA = Bank Address (A10)
CA = Column Address (A0-A7)
PA = Precharge All (A9)
AP = Auto Precharge (A9)
Notes:
1. All entries assume the CKE was active (High) during the preceding clock cycle and the current clock cycle.
2. Illegal to bank in specified state; Function may be legal in the bank indicated by BA, depending on the state of that bank.
3. Must satisfy bus contention, bus turn around, and/or write recovery requirements.
4. NOP to bank precharging or in idle state. May precharge bank indicated by BA (and PA).
5. Illegal if any bank is not idle.
6. Legal only if all banks are in idle or row active state.
Integrated Silicon Solution, Inc.
27
ADVANCE INFORMATION SR037-0C
09/10/98