OKI Semiconductor
FEDS82V16520A-01
MS82V16520A
Function Truth Table (1/2)
Current State
Idle
Active (ACT)
Read (RD)
CS RAS CAS WE
H× × ×
L HHH
L HH L
LHL ×
L LHH
LLLL
L LHL
L L LH
H× × ×
L HH ×
LHLH
LHL L
L LHH
L LHL
LLL×
H× × ×
L HHH
L HH L
Write (WT)
LHLH
LHL L
L LHH
L LHL
LLL×
H× × ×
L HHH
L HH L
LHLH
LHL L
L LHH
L LHL
LLL×
Note 1
BA Address
Action
Note
×
×
NOP
×
×
NOP
BA
×
ILLEGAL
2
BA CA, A9 ILLEGAL
2
BA RA Row Active
L Op-Code Mode Register Write
BA A9 NOP
4
×
×
Auto Refresh/Self refresh
5
×
×
NOP
×
×
NOP
BA CA, A9 Read
BA CA, A9 Write
BA RA ILLEGAL
2
BA A9 Precharge
×
×
ILLEGAL
×
×
NOP (Continue Row Active after Burst ends)
×
×
NOP (Continue Row Active after Burst ends)
×
×
1,2,4,8 Burst Length : ILLEGAL
Full Page Burst : Burst Stop → Row Active
BA CA, A9 Term Burst, new Read
3
BA CA, A9 Term Burst, start Write
3
BA RA ILLEGAL
2
BA A9 Term Burst, execute Precharge
×
×
ILLEGAL
×
×
NOP (Continue Row Active after Burst ends)
×
×
NOP (Continue Row Active after Burst ends)
×
×
1,2,4,8 Burst Length : ILLEGAL
Full Page Burst : Burst Stop → Row Active
BA CA, A9 Term Burst, start Read
3
BA CA, A9 Term Burst, new Write
3
BA RA ILLEGAL
2
BA A9 Term Burst, execute Precharge
3
×
×
ILLEGAL
8/40