Samsung SC32442B54, User Manual

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K5D2G13ACM-D075
Revision 1.0
December 2006
69
MCP MEMORY
C. FUNCTION TRUTH TABLE (TABLE 1, Continued)
(RA = Row Address, BA = Bank Address, NOP = No Operation Command, CA = Column Address, AP = Auto Precharge)
Note :
1) All entries assume that the CKE was active (High) during the precharge clock and the current clock cycle.
2) Illegal to bank in specified state ; Function may be Iegal 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 A
10
/AP).
5) Illegal if any bank is not idle.
Current CS RAS CAS WE BA Address Action Note
Precharging
H X X X X X NOP --> Idle after t
RP
L H H H X X NOP --> Idle after t
RP
L H H L X X ILLEGAL 2
L H L X BA CA ILLEGAL 2
L L H H BA RA ILLEGAL 2
L L H L BA A
10
/AP NOP --> Idle after t
RP
4
Row
Activating
L L L X X X ILLEGAL
H X X X X X NOP --> Row Active after t
RCD
L H H H X X NOP --> Row Active after t
RCD
L H H L X X ILLEGAL 2
L H L X BA CA ILLEGAL 2
L L H H BA RA ILLEGAL 2
L L H L BA A
10
/AP ILLEGAL 2
L L L X X X ILLEGAL
Refreshing
H X X X X X NOP --> Idle after t
RC
L H H X X X NOP --> Idle after t
RC
L H L X X X ILLEGAL
L L H X X X ILLEGAL
L L L X X X ILLEGAL
Mode
Register
Accessing
H X X X X X NOP --> Idle after 2 clocks
L H H H X X NOP --> Idle after 2 clocks
L H H L X X ILLEGAL
L H L X X X ILLEGAL
L L X X X X ILLEGAL