MSC23S2720E-8BS9 Datasheet, PDF (9/11 Pages) OKI electronic componets – 2,097,152 Word x 72 Bit SYNCHRONOUS DYNAMIC RAM MODULE (2BANK)

MSC23S2720E-8BS9 (98.08.31)
FUNCTION TRUTH TABLE (Table1)(1/2)
Current State /CS /RAS /CAS /WE BA ADDR
Action
Idle
H
X
X
XX
X
NOP
L
H
H
HX
X
NOP
L
H
H
L BA
X
ILLEGAL ²
L
H
L
X BA
CA
ILLEGAL ²
L
L
H
H BA
RA
Row Active
L
L
H
L BA
A10
NOP ⁴
L
L
L
HX
X
Auto-Refresh or Self-Refresh ⁵
L
L
L
L L OP Code Mode Register write
Row Active
H
X
X
XX
X
NOP
L
H
H
XX
X
NOP
L
H
L
H BA CA, A10 Read
L
H
L
L BA CA, A10 Write
L
L
H
H BA
RA
ILLEGAL ²
L
L
H
L BA A10 Precharge
L
L
L
XX
X
ILLEGAL
Read
H
X
X
XX
X
NOP (Continue Row Active after Burst ends)
L
H
H
HX
X
NOP (Continue Row Active after Burst ends)
L
H
H
L BA
X
Reserved
L
H
L
H BA CA, A10 Term Burst, start new Burst Read
L
H
L
L BA CA, A10 Term Burst, start new Burst Write
L
L
H
H BA
RA
ILLEGAL ²
L
L
H
L BA A10 Term Burst, execute Row Precharge
L
L
L
XX
X
ILLEGAL
Write
H
X
X
XX
X
NOP (Continue Row Active after Burst ends)
L
H
H
HX
X
NOP (Continue Row Active after Burst ends)
L
H
H
L BA
X
ILLEGAL ²
L
H
L
H BA CA, A10 Term Burst, start new Burst Read
L
H
L
L BA CA, A10 Term Burst, start new Burst Write
L
L
H
H BA
RA
ILLEGAL ²
L
L
H
L BA A10 Term Burst, execute Row Precharge
L
L
L
XX
X
ILLEGAL
Read with
H
X
X
XX
X
NOP (Continue Burst to End and enter Row Precharge)
Auto Precharge L
H
H
HX
X
NOP (Continue Burst to End and enter Row Precharge)
L
H
H
L BA
X
ILLEGAL ²
L
H
L
H BA CA, A10 ILLEGAL ²
L
H
L
LX
X
ILLEGAL
L
L
H
X BA RA, A10 ILLEGAL ²
L
L
L
XX
X
ILLEGAL
Write with
H
X
X
XX
X
NOP (Continue Burst to End and enter Row Precharge)
Auto Precharge L
H
H
HX
X
NOP (Continue Burst to End and enter Row Precharge)
L
H
H
L BA
X
ILLEGAL ²
L
H
L
H BA CA, A10 ILLEGAL ²
L
H
L
LX
X
ILLEGAL
L
L
H
X BA RA, A10 ILLEGAL ²
L
L
L
XX
X
ILLEGAL
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