HY5DU281622ET
OPERATION COMMAND TRUTH TABLE - IV
Current
State
/CS
/RAS
/CAS
/WE
Address
Command
Action
ILLEGAL11
ILLEGAL11
ILLEGAL11
ILLEGAL11
L
L
L
L
H
L
L
L
L
H
H
L
L
H
L
BA, CA, AP
BA, RA
BA, AP
X
WRITE/WRITEAP
ACT
WRITE
PRE/PALL
AREF/SREF
H
ILLEGAL11
L
H
L
L
X
H
H
L
X
H
H
L
X
H
L
OPCODE
MRS
DSEL
NOP
BST
X
X
X
NOP - Enter IDLE after tMRD
NOP - Enter IDLE after tMRD
ILLEGAL11
ILLEGAL11
ILLEGAL11
ILLEGAL11
ILLEGAL11
ILLEGAL11
ILLEGAL11
L
L
L
L
L
L
L
H
H
L
L
L
H
L
BA, CA, AP
BA, CA, AP
BA, RA
BA, AP
READ/READAP
WRITE/WRITEAP
ACT
MODE
REGISTER
ACCESSING
H
H
L
H
L
L
PRE/PALL
AREF/SREF
MRS
L
H
L
X
L
L
OPCODE
Note :
1. H - Logic High Level, L - Logic Low Level, X - Don’t Care, V - Valid Data Input, BA - Bank Address, AP - AutoPrecharge Address,
CA - Column Address, RA - Row Address, NOP - NO Operation.(see note 12)
2. All entries assume that CKE was active(high level) during the preceding clock cycle.
3. If both banks are idle and CKE is inactive(low level), then in power down mode.
4. Illegal to bank in specified state. Function may be legal in the bank indicated by Bank Address(BA) depending on the state of that
bank.
5. If both banks are idle and CKE is inactive(low level), then self refresh mode.
6. Illegal if tRCD is not met.
7. Illegal if tRAS is not met.
8. Must satisfy bus contention, bus turn around, and/or write recovery requirements.
9. Illegal if tRRD is not met.
10. Illegal for single bank, but legal for other banks in multi-bank devices.
11. Illegal for all banks.
12. In here, Don’t Care means logical value only, it doesn’t mean ’Don’t care for DC level of each signals’. DC level should be out of
VIHmin ~ VILmax
Rev. 0.5 / Jan. 2005
12
HYNIX [ HYNIX SEMICONDUCTOR ]
