HY5DU121622BT-5 Datasheet, PDF (12/30 Pages) Hynix Semiconductor – 512Mb(32Mx16) gDDR SDRAM

OPERATION COMMAND TRUTH TABLE-IV
HY5DU121622BT(P)
Current
State
/CS /RAS /CAS /WE Address
Command
Action
L
H
L
L
BA, CA, AP WRITE/WRITEAP
ILLEGAL¹¹
L
L
H
H
BA, RA
ACT
ILLEGAL¹¹
WRITE
L
L
H
L
BA, AP
PRE/PALL
ILLEGAL¹¹
L
L
L
H
X
AREF/SREF
ILLEGAL¹¹
L
L
L
L
OPCODE
MRS
ILLEGAL¹¹
H
X
X
X
X
DSEL
NOP - Enter IDLE after tMRD
L
H
H
H
X
NOP
NOP - Enter IDLE after tMRD
L
H
H
L
X
BST
ILLEGAL¹¹
L
H
L
H
BA, CA, AP
READ/READAP
MODE
REGISTER
L
H
L
L
BA, CA, AP WRITE/WRITEAP
ACCESSING
L
L
H
H
BA, RA
ACT
ILLEGAL¹¹
ILLEGAL¹¹
ILLEGAL¹¹
L
L
H
L
BA, AP
PRE/PALL
ILLEGAL¹¹
L
L
L
H
X
AREF/SREF
ILLEGAL¹¹
L
L
L
L
OPCODE
MRS
ILLEGAL¹¹
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.
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.
Rev. 0.2 / Mar. 2005
12