HYB39S164400 Datasheet, PDF (62/64 Pages) Siemens Semiconductor Group – 16 MBit Synchronous DRAM

Complete List of Operation Commands
SDRAM FUNCTION TRUTH TABLE
HYB39S16400/800/160BT-8/-10
16MBit Synchronous DRAM
CURRENT CS
STATE¹
Idle
H
L
L
L
L
L
L
L
Row Active H
L
L
L
L
L
L
Read
H
L
L
L
L
L
L
L
Write
H
L
L
L
L
L
L
L
Read
H
with
L
Auto
L
Precharge L
L
L
L
L
RAS CAS WE
X
X
X
H
H
H
H
H
L
H
L
X
L
H
H
L
H
L
L
L
H
L
L
L
X
X
X
H
H
X
H
L
H
H
L
L
L
H
H
L
H
L
L
L
X
X
X
X
H
H
H
H
H
L
H
L
H
H
L
L
L
H
H
L
H
L
L
L
X
X
X
X
H
H
H
H
H
L
H
L
H
H
L
L
L
H
H
L
H
L
L
L
X
X
X
X
H
H
H
H
H
L
H
L
H
H
L
L
L
H
H
L
H
L
L
L
X
BS
Addr ACTION
X
X
NOP or Power Down
X
X
BS
X
BS
X
NOP
ILLEGAL²
ILLEGAL²
BS
RA
Row (&Bank) Active; Latch Row Address
BS
AP
NOP⁴
X
X
Auto-Refresh or Self-Refresh⁵
Op- Code Mode reg. Access⁵
X
X
NOP
X
X
NOP
BS
CA,AP Begin Read; Latch CA; DetermineAP
BS
CA,AP Begin Write; Latch CA; DetermineAP
BS
X
ILLEGAL²
BS
AP
Precharge
X
X
ILLEGAL
X
X
NOP (Continue Burst to End;>Row Active)
X
X
NOP (Continue Burst to End;>Row Active)
BS
X
Burst Stop Command > Row Active
BS
CA,AP Term Burst, New Read, DetermineAP³
BS
CA,AP Term Burst, Start Write, DetermineAP³
BS
X
ILLEGAL²
BS
AP
Term Burst, Precharge
X
X
ILLEGAL
X
X
NOP (Continue Burst to End;>Row Active)
X
X
NOP (Continue Burst to End;>Row Active)
BS
X
Burst Stop Command > Row Active
BS
CA,AP Term Burst, Start Read, DetermineAP³
BS
CA,AP Term Burst, New Write, DetermineAP³
BS
X
ILLEGAL²
BS
AP
Term Burst, Precharge³
X
X
ILLEGAL
X
X
X
X
BS
X
BS
X
X
X
BS
X
BS
AP
X
X
NOP (Continue Burst to End;> Precharge)
NOP (Continue Burst to End;> Precharge)
ILLEGAL²
ILLEGAL²
ILLEGAL
ILLEGAL²
ILLEGAL²
ILLEGAL
Semiconductor Group
62