k4s160822d Samsung Semiconductor, Inc., k4s160822d Datasheet - Page 27

• Manufacturer Part Number: k4s160822d
• Description: 2mx8 Sdram 1m X 8bit X 2 Banks Synchronous Dram Lvttl
• Manufacturer: Samsung Semiconductor, Inc.

K4S160822D
FUNCTION TRUTH TABLE (TABLE 1)
Refreshing
Accessing
Activating
Abbreviations : RA = Row Address
Register
Current
State
Mode
*Note : 1. All entries assume the CKE was active (High) during the precharge clock and the current clock cycle.
Row
2. Illegal to bank in specified state ; Function may be Iegal in the bank indicated by BA, depending on the
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 A
5. Illegal if any bank is not idle.
state of that bank.
CS
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
NOP = No Operation Command
RAS
X
H
H
H
X
H
H
X
H
H
H
L
L
L
L
L
L
L
CAS
H
H
H
H
H
H
H
H
L
X
L
L
X
L
L
X
L
X
WE
X
X
H
X
H
X
X
X
X
X
X
X
H
X
X
L
L
L
CA = Column Address
BA = Bank Address
BA
BA
BA
BA
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
A
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ADDR
10
CA
RA
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
/AP
ILLEGAL
NOP --> Row Active after t
NOP --> Row Active after t
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
NOP --> Idle after t
NOP --> Idle after t
ILLEGAL
ILLEGAL
ILLEGAL
NOP --> Idle after 2 clocks
NOP --> Idle after 2 clocks
ILLEGAL
ILLEGAL
ILLEGAL
AP = Auto Precharge
10
/AP).
RFC
RFC
ACTION
RCD
RCD
CMOS SDRAM
Rev. 1.0 (Oct. 1999)
Note
2
2
2
2