IS42S32400E-7B ISSI, IS42S32400E-7B Datasheet - Page 20

• Manufacturer Part Number: IS42S32400E-7B
• Description: DRAM 128M (4Mx32) 143MHz Commercial Temp
• Manufacturer: ISSI

Specifications of IS42S32400E-7B

• Product Category: DRAM
• Factory Pack Quantity: 240

IS42S32400E, IS45S32400E
INITIALIzE AND LOAD MODE REGISTER
20
DQM0-DQM3
Notes:
1. If CS is High at clock High time, all commands applied are NOP.
2. The Mode register may be loaded prior to the Auto-Refresh cycles if desired.
3. JEDEC and PC100 specify three clocks.
4. Outputs are guaranteed High-Z after the command is issued.
COMMAND
A0-A9, A11
BA0, BA1
CKE
CLK
A10
DQ
Power-up: V
and CLK stable
T = 100µs Min.
t
t
CKS
CMS
NOP
T
T0
t
t
CKH
CMH
t
CK
CC
SINGLE BANK
ALL BANKS
t
CMS
PRECHARGE
ALL BANKS
T1
Precharge
all banks
t
CMH
t
RP
t
CMS
REFRESH
Tn+1
AUTO
AUTO REFRESH
t
CMH
t
CH
NOP
t
RC
(1)
t
CL
REFRESH
To+1
AUTO
AUTO REFRESH
NOP
t
RC
t
t
t
Load MODE
REGISTER
AS
AS
AS
CODE
CODE
CODE
Tp+1
Program MODE REGISTER
Integrated Silicon Solution, Inc. - www.issi.com
t
t
t
AH
AH
AH
Tp+2
t
NOP
MRD
DON'T CARE
ACTIVE
BANK
ROW
ROW
Tp+3
(2, 3, 4)
10/28/10
Rev. E