IS46R16160D-6TLA2-TR ISSI, IS46R16160D-6TLA2-TR Datasheet - Page 19

• Manufacturer Part Number: IS46R16160D-6TLA2-TR
• Description: DRAM 256Mb, 2.5V, 166MHz 64M x 8 DDR1
• Manufacturer: ISSI

Specifications of IS46R16160D-6TLA2-TR

• Rohs: yes
• Organization: 64 M x 8
• Package / Case: TSOP-66
• Memory Size: 256 MB
• Maximum Clock Frequency: 167 MHz
• Access Time: 6 ns
• Supply Voltage - Max: 2.7 V
• Supply Voltage - Min: 2.3 V
• Maximum Operating Temperature: + 105 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT

IS43R83200D
IS43/46R16160D, IS43/46R32800D
EXTENDED MODE REGISTER (EMR) DEFINITION
The Extended Mode Register controls functions beyond those controlled by the Mode Register; these additional
functions include DLL enable/disable, and output drive strength selection. The Extended Mode Register is
programmed via the MODE REGISTER SET command (with BA1=0 and BA0=1) and will retain the stored information
until it is reprogrammed, or the device loses power. The Extended Mode Register must be loaded when all banks
are idle and no bursts are in progress, and the controller must wait the specified time tMRD before initiating any
subsequent operation. Violating either of these requirements will result in unspecified operation. Reserved states
should not be used, as unknown operation or incompatibility with future versions may result.
DLL Enable/Disable
The DLL must be enabled for normal operation. DLL enable is required during power-up initialization, and upon
returning to normal operation after having disabled the DLL for the purpose of debug or evaluation (upon exiting Self
Refresh Mode, the DLL is enabled automatically). Any time the DLL is enabled a DLL Reset must follow and 200 clock
cycles must occur before any executable command can be issued.
OUTPUT DRIVE STRENGTH (DS)
The normal drive strength for all outputs is specified to be SSTL_2, Class II. This DRAM also supports a reduced
driver strength option, intended for lighter load and/or point-to-point environments.
EXTENDED MODE REGISTER
BA1 BA0 A12
Integrated Silicon Solution, Inc.
Rev. B
06/19/2012
BA1 BA0 Mode Register Definition
0
0
1
1
0
1
0
1
Program Mode Register
Program Extended Mode Register
Reserved
Reserved
2
A11
A10
Reserved
A9
(1)
A8
A7
A6
A5
NOTES:
1. A logic 0 should be programmed to all unused/undefined ad-
2. A12 is not used for x32 and should be ignored for this option.
dress bits to ensure future compatibility
A4
A3
A1 Drive Strength
0
1
A2
Normal
Reduced
A1
A0 DLL
0
1
A0
Enable
Disable
Ext. Mode Reg. (Ex)
Address Bus (Ax)
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