Command Truth Table - Harman Kardon AVR245 Service Manual

AVR245

COMMAND TRUTH TABLE

Command
Mode Register Set
No Operation
Bank Active
Read
Read with Auto precharge
Write
Write with Auto precharge
Precharge All Bank
Precharge selected Bank
Burst Stop
U/LDQM
Auto Refresh
Burst-READ-Single-WRITE
1
Self Refresh
Precharge power
down
Clock Suspend
Note :
1. Exiting Self Refresh occurs by asynchronously bringing CKE from low to high.
2. X=Do not care, L=Low, H=High, BA=Bank Address, RA= Row Address, CA=Column Address, Opcode=Operand Code,
NOP=No Operation.
Rev. 0.2 / Aug. 2003
CKEn-1 CKEn
H X
H X
H X
H X
H X
H X
H X
H
H H
H X
Entry H L
Exit L H
Entry H L
Exit L H
Entry H L
Exit L H
CS RAS CAS WE
L L L L
H X X X
L H H H
L L H H
L H L H
L H L L
L L H L
L H H L
X
L L L H
L L L L
L L L H
H X X X
L H H H
H X X X
L H H H
H X X X
L H H H
H X X X
L V V V
X
109
harman/kardon
HY57V161610E
A10/
DQM A0~A9 BA
AP
X OP code
X X
X Row Address
L
Column
X
Address
H
L
Column
X
Address
H
H
X X
L
X X
V X
X X
A9 Pin High
X
(Other Pins OP code)
X
X
X
X
X
X
X
X
X
Note
V
V
V
X
V
12