UT52L1616 查看數據表（PDF） - Utron Technology Inc
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UT52L1616 Datasheet PDF : 36 Pages
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UTRON
Preliminary Rev. 0.91
UT52L1616
1M X 16 BIT SDRAM
Function Truth Table
The following table shows the operations that are performed when each command is issued in each mode of the
synchronous DRAM.
Current state
Precharge
Idle
Row active
CE RAS CAS WE
HX
X
X
LH
H
H
LH
H
L
LH
L
H
LH
L
L
LL
H
H
LL
H
L
LL
L
H
LL
L
L
HX
X
X
LH
H
H
LH
H
L
LH
L
H
LH
L
L
LL
H
H
LL
H
L
LL
L
H
LL
L
L
HX
X
X
LH
H
H
LH
H
L
LH
L
H
LH
L
L
LL
H
H
Address
X
X
X
BA,CA,A10
BA,CA,A10
BA,RA
BA,A10
X
MODE
X
X
X
BA,CA,A10
BA,CA,A10
BA,RA
BA,A10
X
MODE
X
X
X
BA,CA,A10
BA,CA,A10
BA,RA
Command
DESL
NOP
BST
READ/READ A
WRIT/WRIT A
ACT
PRE,PALL
REF,SELF
MRS
DESL
NOP
BST
READ/READ A
WRIT/WRIT A
ACT
PRE,PALL
REF,SELF
MRS
DESL
NOP
BST
READ/READ A
WRIT/WRIT A
ACT
Read
LL
H
L
BA,A10
PRE,PALL
LL
L
H
X
REF,SELF
LL
L
L
MODE
MRS
HX
X
X
X
DESL
LH
H
H
X
NOP
LH
H
L
X
BST
LH
L
H
BA,CA,A10 READ/READ A
LH
L
L
BA,CA,A10 WRIT/WRIT A
LL
H
H
BA,RA
ACT
LL
H
L
BA,A10
PRE,PALL
Write
LL
L
H
X
REF,SELF
LL
L
L
MODE
MRS
HX
X
X
X
DESL
LH
H
H
X
NOP
LH
H
L
X
BST
LH
L
H
BA,CA,A10 READ/READ A
LH
L
L
BA,CA,A10 WRIT/WRIT A
LL
H
H
BA,RA
ACT
LL
H
L
BA,A10
PRE,PALL
LL
L
H
X
LL
L
L
MODE
REF,SELF
MRS
Operation
Enter IDLE after tRP
Enter IDLE after tRP
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
NOP
NOP
NOP
ILLEGAL
ILLEGAL
Bank and row active
NOP
Refresh
Mode register set
NOP
NOP
NOP
Begin read
Begin write
Other bank active; ILLEGAL
on same bank*³
Precharge
ILLEGAL
ILLEGAL
Continue burst to end
Continue burst to end
Burst stop to full page
Continue burst read to CAS
latency and New read
Term burst read/start write
Other bank active; ILLEGAL
on same bank*³
Term burst read and
Precharge
ILLEGAL
ILLEGAL
Continue burst to end
Continue burst to end
Burst stop on full page
Term burst and New read
Term burst and New read
Other bank active; ILLEGAL on
same bank*³
Term burst write and
Precharge*²
ILLEGAL
ILLEGAL
UTRON TECHNOLOGY INC.
1F, No. 11, R&D Rd. II, Science-Based Industrial Park, Hsinchu, Taiwan, R. O. C.
TEL: 886-3-5777882 FAX: 886-3-5777919
8
P90004
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