is43r16160 Integrated Silicon Solution, Inc., is43r16160 Datasheet - Page 22

• Manufacturer Part Number: is43r16160
• Description: 32mx8, 16mx16 256mb Synchronous Dram
• Manufacturer: Integrated Silicon Solution, Inc.

IS43R16160B
22
DDR SDRAM (Rev.1.1)
I
IS43R83200B
IS43R16160B, IC43R16160B
OPERATIONAL DESCRIPTION
BANK ACTIVATE
the bank addresses (BA0,1). A row is indicated by the row address A0-12. The minimum activation
interval between one bank and the other bank is tRRD.
PRECHARGE
precharge all command (PREA,PRE+A10=H) is available to deactivate them at the same time. After
tRP from the precharge, an ACT command to the same bank can be issued.
The DDR SDRAM has four independent banks. Each bank is activated by the ACT command with
The PRE command deactivates the bank indicated by BA0,1. When multiple banks are active, the
Command
A0-9,11,12
A precharge command can be issued at BL/2 from a read command without data loss.
BA0,1
/CLK
DQS
CLK
A10
DQ
Preliminary
Preliminary
2 ACT command / tRCmin
ACT
Xa
Xa
00
tRRD
Bank Activation and Precharge All (BL=8, CL=2)
tRCD
ACT
01
Xb
Xb
READ
Y
0
00
tRCmin
256M Double Data Rate Synchronous DRAM
BL/2
tRAS
Qa0
Qa1
Qa2
Precharge all
Qa3
PRE
1
Qa4
Zentel Electronics Corporation
Qa5
tRP
Qa6
A3S56D30/40ETP
Integrated Silicon Solution, Inc.
Qa7
ACT
Xb
Xb
01
Rev. 00A
09/10/08