is42s32160c Integrated Silicon Solution, Inc., is42s32160c Datasheet - Page 14
is42s32160c
Manufacturer Part Number
is42s32160c
Description
16mx32 512mb Synchronous Dram
Manufacturer
Integrated Silicon Solution, Inc.
Datasheet
1.IS42S32160C.pdf
(60 pages)
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IS42S32160C
7
14
Mode Register Set command
(RAS# =”L”, CAS# =”L”, WE# =”L”, BS0,1 and A12-A0 =Register Data)
The mode register stores the data for controlling the various operating modes of SDRAM. The Mode Register Set
command programs the values of CAS# latency, Addressing Mode and Burst Length in the Mode register to make
SDRAM useful for a variety of different applications. The default values of the Mode Register after power-up are
undefined;therefore this command must be issued at the power-up sequence.The state of pins BS0,1 and
A0-A12 in the same cycle is the data written to the mode register.One clock cycle is required to complete the write
in the mode register (refer to Figure "Mode Register Set Cycle").The contents of the mode register can be changed
using the same command and the clock cycle requirements during operation as long as all banks are in the idle state.
CAS#
ADDR.
RAS#
DQM
CKE
CS#
WE#
CLK
DQ
Hi-Z
T0
t CK2
T1
Precharge All
T2
t
Mode Register
Address Key
RP
Set Command
Mode Register Set Cycle
T3
Clock min.
T4
Any
Command
T5
T6
T7
T8
Integrated Silicon Solution, Inc.
T9
T10
Rev. B
01/22/09