IS43R16320B
IC43R16320B
Auto Precharge
Read with auto-precharge
The precharge is automatically performed after completing a read operation. The precharge starts tRPD (BL/2)
cycle after READA command input. tRAP specification for READA allows a read command with auto precharge to be
issued to a bank that has been activated (opened) but has not yet satisfied the tRAS (min) specification. A column
command to the other active bank can be issued the next cycle after the last data output. Read with auto-precharge
command does not limit row commands execution for other bank. Refer to ‘Function truth table and related
note(Notes.*14)‘.
CK
/CK
tRPD
tRP (min)
tRAP (min) = tRCD (min)
BL/2 cycles
ACT
READA
NOP
ACT
Command
DQS
tAC,tDQSCK
DQ
out0 out1 out2 out3
Note: Internal auto-precharge starts at the timing indicated by " ".
Read with auto-precharge
Write with auto-precharge
The precharge is automatically performed after completing a burst write operation. The precharge operation is
started (1 + BL/ 2 + tWR) cycles after WRITA command issued. A column command to the other banks can be
issued the next cycle after the internal precharge command issued. Write with auto-precharge command does not
limit row commands execution for other bank. Refer to the ‘Read with Auto-Precharge Enabled, Write with Auto-
Precharge Enabled’ section. Refer to ‘Function truth table and related note(Notes.*14)‘.
CK
/CK
tRAS (min)
tRP
tRCD (min)
ACT
NOP
WRITA
NOP
ACT
Command
1 + BL/2 + tWR cycles
DM
DQS
DQ
in1 in2 in3 in4
BL = 4
Note: Internal auto-precharge starts at the timing indicated by " ".
Burst Write (BL = 4)
28
Integrated Silicon Solution, Inc. — www.issi.com
Rev. 00B
06/11/08
ISSI [ INTEGRATED SILICON SOLUTION, INC ]
