is42g32256 ETC-unknow, is42g32256 Datasheet - Page 32

• Manufacturer Part Number: is42g32256
• Description: 256k 16-mbit Synchronous Graphics
• Manufacturer: ETC-unknow

IS42G32256
32
Figure 21. Operating Frequency / Latency Relationships
Symbol Parameter
t
t
t
t
t
t
t
t
SMCD
t
t
t
t
t
t
t
t
t
t
BDAL
CL
t
WBD
WDL
t
QMD
DMD
MCD
t
CAC
RCD
RAC
RAS
t
RRD
CCD
RBD
RQL
t
DPL
DAL
PQL
—
CK
RC
RP
RR
EP
Clock Cycle Time
Operating Frequency
CAS
Active Command to Read/Write Command Delay Time
RAS
Command Period (REF to REF/ACT to ACT)
Command Period (ACT to PRE)
Command Period (PRE to ACT)
Command Period (ACT[0] to ACT [1])
Column Command Delay Time
(READ, READA, WRIT, WRITA)
Last Data In to Precharge Command Delay Time
Last Data In to Active/Refresh Command Delay Time
(Auto-Precharge, Same Bank)
Burst Stop Command to Output in
HIGH-Z Delay Time (Read)
Burst Stop Command to Input in Invalid Delay Time (Write) 0
Precharge Command to Output in
HIGH-Z Delay Time (Read)
Precharge Command to Input in Invalid Delay Time (Write) 0
Block Write to Active Command
(Auto Precharge, Same Bank)
Last Data Out to Precharge Command
Special Mode Register Set to Command
Register Set Command to Register Set Command
Last Output to Auto-Precharge Start Time (Read)
DQM to Output Delay Time (Read)
DQM to Input Delay Time (Write)
Mode Register Set to Command Delay Time
Latency (t
Latency
RCD
+ t
CAC
)
143 100
–2
–2
3
7
3
3
6
9
6
3
2
1
2
5
3
3
6
1
2
2
0
1
-7
10
–1
–1
2
2
0
2
2
2
4
6
4
2
2
1
2
4
2
0
0
5
1
2
1
Integrated Silicon Solution, Inc.
125 83
–2
–2
3
8
3
3
6
9
6
3
3
1
2
5
3
0
3
0
6
1
2
2
0
1
-8
ADVANCE INFORMATION SR037-0C
12
–1
–1
2
2
2
4
6
4
2
2
1
2
4
2
0
2
0
5
1
2
2
0
1
100 66
10
–2
–2
3
3
3
6
9
6
3
2
1
2
5
3
0
3
0
6
1
2
2
0
1
-10
15
–1
–1
2
2
2
4
6
4
2
3
1
2
4
2
0
2
0
5
1
2
2
0
1
ISSI
Units
cycle
cycle
cycle
cycle
cycle
cycle
cycle
cycle
cycle
cycle
cycle
cycle
cycle
cycle
cycle
cycle
cycle
cycle
cycle
cycle
cycle
cycle
MHz
ns
09/10/98
®