is42s32160c Integrated Silicon Solution, Inc., is42s32160c Datasheet - Page 17

• Manufacturer Part Number: is42s32160c
• Description: 16mx32 512mb Synchronous Dram
• Manufacturer: Integrated Silicon Solution, Inc.

I
IS42S32160C
Integrated Silicon Solution, Inc. — 1-800-379-4774
Rev. B
01/22/09
Test Mode field (A8~A7)
Write Burst Length (A9)
This bit is used to select the burst write length.
8
9
These two bits are used to enter the test mode and must be programmed to “00”in normal operation.
No-Operation command
(RAS# =”H”, CAS# =”H”, WE# =”H”)
is Low).This prevents unwanted commands from being registered during idle or wait states.
Burst Stop command
(RAS# =”H”, CAS# =”H”, WE# =”L”)
The Burst Stop command is used to terminate either fixed-length or full-page bursts.This
command is only effective in a read/write burst without the auto precharge function.The terminated
read burst ends after a delay equal to the CAS# latency (refer to Figure "Termination of a Burst Read
Operation"). The termination of a write burst is shown in the Figure "Termination of a Burst Write Operation".
CAS# latency=2
tCK2,DQ’s
CL K
COMMAN D
CAS# latency=2,3
DQ’s
CLK
COMMAND
CAS# latency=3
tCK3,DQ’s
Termination of a Burst Read Operation (Burst Length > 4, CAS# Latency =2,3)
The No-Operation command is used to perform a NOP to the SDRAM which is selected (CS#
READ A
T0
T0
Termination of a Burst Write Operation (Burst Length =X)
NOP
A8
0
0
1
A9
0
1
WRITE A
DIN A 0
T 1
T 1
NOP
0
1
X
A7
DOUT A 0
Burst
Single Bit
DIN A 1
Write Burst Length
T2
NOP
T2
NOP
DOUT A 0
DOUT A 1
DIN A 2
T3
NOP
T3
NOP
normal mode
Vendor Use Only
Vendor Use Only
Test Mode
Input Data for the Write is masked.
Burst Stop
Burst Stop
don’t care
DOUT A 2
DOUT A 1
T4
T4
DOUT A 2
DOUT A 3
T5
NOP
The Burst ends after a delay equal to the CAS# latency.
T5
NOP
DOUT A 3
T6
NOP
T6
NOP
T7
NOP
T7
NOP
I
NOP
T 8
NOP
T 8
®
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