IS42S32200B7TL ISSI, Integrated Silicon Solution Inc, IS42S32200B7TL Datasheet - Page 30

• Manufacturer Part Number: IS42S32200B7TL
• Manufacturer: ISSI, Integrated Silicon Solution Inc
• Type: SDRAMr

Specifications of IS42S32200B7TL

• Organization: 2Mx32
• Density: 64Mb
• Address Bus: 13b
• Access Time (max): 7ns
• Maximum Clock Rate: 143MHz
• Operating Supply Voltage (typ): 3.3V
• Package Type: TSOP-II
• Operating Temp Range: 0C to 70C
• Operating Supply Voltage (max): 3.6V
• Operating Supply Voltage (min): 3V
• Supply Current: 180mA
• Pin Count: 86
• Mounting: Surface Mount
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Compliant

IS42S32200B
Fig CAP 3 - WRITE With Auto Precharge interrupted by a READ
Fig CAP 4 - WRITE With Auto Precharge interrupted by a WRITE
30
WRITE with Auto Precharge
3. Interrupted by a READ (with or without auto precharge):
A READ to bank m will interrupt a WRITE on bank n when
registered, with the data-out appearing CAS latency later.
The PRECHARGE to bank n will begin after t
where t
The last valid WRITE to bank n will be data-in registered
one clock prior to the READ to bank m.
Internal States
Internal States
COMMAND
COMMAND
ADDRESS
ADDRESS
WR
BANK m
BANK m
BANK n
BANK n
begins when the READ to bank m is registered.
CLK
CLK
DQ
DQ
T0
Page Active
T0
Page Active
NOP
NOP
WRITE - AP
WRITE - AP
BANK n,
BANK n,
BANK n
BANK n
T1
T1
COL a
COL a
D
D
Page Active
IN
IN
WRITE with Burst of 4
a
a
Page Active
WRITE with Burst of 4
Integrated Silicon Solution, Inc. — www.issi.com —
T2
D
T2
D
NOP
NOP
IN
IN
WR
a+1
a+1
is met,
READ - AP
BANK m,
BANK m
T3
T3
NOP
D
COL b
IN
Interrupt Burst, Write-Back
a+2
t
CAS Latency - 3 (BANK m)
4. Interrupted by a WRITE (with or without auto precharge):
WR
AWRITE to bank m will interrupt a WRITE on bank n when
registered. The PRECHARGE to bank n will begin after
t
m is registered. The last valid data WRITE to bank n will
be data registered one clock prior to a WRITE to bank m.
- BANK n
WR
WRITE - AP
BANK m,
BANK m
T4
T4
NOP
COL b
D
is met, where t
Interrupt Burst, Write-Back
IN
READ with Burst of 4
b
t
WR
WRITE with Burst of 4
- BANK n
T5
T5
D
NOP
NOP
IN
b+1
WR
begins when the WRITE to bank
T6
T6
D
NOP
NOP
IN
D
Precharge
t
OUT
b+2
RP - BANK n
b
t
Precharge
RP - BANK n
DON'T CARE
DON'T CARE
T7
T7
D
NOP
NOP
D
Write-Back
IN
Precharge
OUT
b+3
ISSI
t
t
RP - BANK m
RP - BANK m
1-800-379-4774
b+1
R e v . 0 0 C
09/29/03
®