IS43R16320B
IC43R16320B
Timing Parameter Measured in Clock Cycle
Number of clock cycle
5ns
tCK
6ns
7.5ns
min.
Parameter
Symbol
tWPD
min.
max.
—
min.
max.
—
max.
—
Unit
tCK
Write to pre-charge command delay
(same bank)
1 + BL/2
+ tWR
1 + BL/2
+ tWR
1 + BL/2
+ tWR
Read to pre-charge command delay
(same bank)
tRPD
BL/2
—
—
BL/2
—
—
BL/2
—
—
tCK
tCK
Write to read command delay
(to input all data)
1 + BL/2
+ tWTR
1 + BL/2
+ tWTR
1 + BL/2
+ tWTR
tWRD
Burst stop command to write
command delay
tBSTW
—
—
—
—
2
—
tCK
(CL = 2)
(CL = 2.5)
(CL = 3)
tBSTW
tBSTW
—
3
—
—
3
3
—
—
3
3
—
—
tCK
tCK
Burst stop command to DQ High-Z
(CL = 2)
tBSTZ
—
—
—
—
2
2
tCK
(CL = 2.5)
(CL = 3)
tBSTZ
tBSTZ
—
3
—
3
2.5
3
2.5
3
2.5
3
2.5
3
tCK
tCK
Read command to write command
delay (to output all data)
(CL = 2)
tRWD
—
—
—
—
2 + BL/2
—
tCK
(CL = 2.5)
(CL = 3)
tRWD
tRWD
—
—
—
3 + BL/2
3 + BL/2
—
—
3 + BL/2
3 + BL/2
—
—
tCK
tCK
3 + BL/2
Pre-charge command to High-Z
(CL = 2)
tHZP
—
—
—
—
2
2
tCK
(CL = 2.5)
tHZP
tHZP
tWCD
tWR
—
3
—
3
2.5
3
2.5
3
2.5
3
2.5
3
tCK
tCK
tCK
tCK
tCK
(CL = 3)
Write command to data in latency
Write recovery
1
1
1
1
1
1
3
—
0
3
—
0
2
—
0
DM to data in latency
tDMD
0
0
0
Self-refresh exit to non-read
command
tSNR
15
—
12
—
10
—
tCK
Self-refresh exit to read command
Power down entry
tSRD
200
1
—
1
200
1
—
1
200
1
—
1
tCK
tCK
tCK
tCK
tPDEN
Power down exit to command input tPDEX
Active to Precharge command period tRAS
1
—
⎯
1
—
⎯
1
—
⎯
8
7
6
Active to Active/Auto-refresh
tRC
11
⎯
⎯
⎯
⎯
10
12
3
⎯
⎯
⎯
⎯
9
⎯
⎯
⎯
⎯
tCK
tCK
tCK
tCK
command period
Auto-refresh to Active/Auto-refresh
tRFC
14
3
10
3
command period
Active to Read/Write delay
tRCD
3
Precharge to active command period tRP
3
3
Integrated Silicon Solution, Inc. — www.issi.com
13
Rev. 00B
06/11/08
ISSI [ INTEGRATED SILICON SOLUTION, INC ]
