is43lr16800f-6bl Integrated Silicon Solution, Inc., is43lr16800f-6bl Datasheet - Page 33

• Manufacturer Part Number: is43lr16800f-6bl
• Description: 2m X 16bits X 4banks Mobile Ddr Sdram
• Manufacturer: Integrated Silicon Solution, Inc.

Rev. 00A | Dec. 2010
Figure24 : Random Write to write
Figure25 : Write to Read (Uninterrupting)
Notes:
Notes:
Command
Address
/CLK
CLK
DQS
DQ
DM
1. Din n,p,m,q = Data-In from Column n,p,m,q.
2. Each Write command may be to any banks.
1. Din n = Data-In from Column n, Dout m = Data-Out from Column m.
2. tWTR is referenced from the first positive CK edge after the last data-in pair.
3. Read and Write command can be directed to different banks, in which case tWTR is not required and the Read command
could be applied ealier.
Command
Address
WRITE
Bank a
COL n
T0
/CLK
CLK
DQS
DQ
DM
tDQSS
(NOM)
Don ’t care
WRITE
Bank a
NOP
COL n
T1
D
n
T0
IN
n+1
tDQSS
(NOM)
Don ’t care
D
IN
WRITE
Bank a
COL p
NOP
n+2
T2
D
T1
D
IN
n
IN
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n+3
D
n+1
D
IN
IN
NOP
WRITE
Bank a
T3
COL m
T2
D
p
IN
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tWTR
p+1
D
IN
Bank a
COL m
READ
T4
WRITE
Bank a
COL q
T3
D
m
IN
m+1
D
IN
NOP
T5
NOP
CL=3
T4
D
q
IN
D
q+1
IN
T6
NOP
IS43/46LR16800F
Advanced Information
D
OUT
m
NOP
T7
D
m+1
OUT
D
m+2
OUT
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