HYB39S164400 Datasheet, PDF (63/64 Pages) Siemens Semiconductor Group – 16 MBit Synchronous DRAM

HYB39S16400/800/160BT-8/-10
16MBit Synchronous DRAM
SDRAM FUNCTION TRUTH TABLE(continued)
CURRENT CS
STATE¹
RAS CAS WE BS
Write
H
X
X
X
X
with
L
H
H
H
X
Auto
L
H
H
L
BS
Precharge L
H
L
H
BS
L
H
L
L
X
L
L
H
H
BS
L
L
H
L
BS
L
L
L
X
X
Precharging H
X
X
X
X
L
H
H
H
X
L
H
H
L
BS
L
H
L
X
BS
L
L
H
H
BS
L
L
H
L
BS
L
L
L
X
X
Row
H
X
X
X
X
Activating L
H
H
H
X
L
H
H
L
BS
L
H
L
X
BS
L
L
H
H
BS
L
L
H
L
BS
L
L
L
X
X
Write
H
X
X
X
X
Recovering L
H
H
H
X
L
H
H
L
BS
L
H
L
X
BS
L
L
H
H
BS
L
L
H
L
BS
L
L
L
X
X
Refreshing H
X
X
X
X
L
H
H
X
X
L
H
L
X
X
L
L
H
X
X
L
L
L
X
X
Mode
H
X
X
X
X
Register
L
H
H
H
X
L
H
H
L
X
Accessing L
H
L
X
X
L
L
X
X
X
Addr
X
X
X
X
X
X
AP
X
X
X
X
X
X
AP
X
X
X
X
X
X
AP
X
X
X
X
X
X
AP
X
X
X
X
X
X
X
X
X
X
X
ACTION
NOP (Continue Burst to End;> Precharge)
NOP (Continue Burst to End;> Precharge)
ILLEGAL²
ILLEGAL²
ILLEGAL
ILLEGAL²
ILLEGAL²
ILLEGAL
NOP;> Idle after tRP
NOP;> Idle after tRP
ILLEGAL²
ILLEGAL²
ILLEGAL²
NOP⁴
ILLEGAL
NOP;> Row Active after tRCD
NOP;> Row Active after tRCD
ILLEGAL²
ILLEGAL²
ILLEGAL²
ILLEGAL²
ILLEGAL
NOP
NOP
ILLEGAL²
ILLEGAL²
ILLEGAL²
ILLEGAL²
ILLEGAL
NOP;> Idle after tRC
NOP;> Idle after tRC
ILLEGAL
ILLEGAL
ILLEGAL
NOP
NOP
ILLEGAL
ILLEGAL
ILLEGAL
Semiconductor Group
63