IS43R32400D-5BL ISSI, Integrated Silicon Solution Inc, IS43R32400D-5BL Datasheet - Page 13

• Manufacturer Part Number: IS43R32400D-5BL
• Manufacturer: ISSI, Integrated Silicon Solution Inc
• Type: DDR SDRAMr

Specifications of IS43R32400D-5BL

• Organization: 4Mx32
• Density: 128Mb
• Address Bus: 14b
• Access Time (max): 700ps
• Maximum Clock Rate: 200MHz
• Operating Supply Voltage (typ): 2.6V
• Operating Temp Range: 0C to 70C
• Operating Supply Voltage (max): 2.7V
• Operating Supply Voltage (min): 2.5V
• Supply Current: 185mA
• Pin Count: 144
• Mounting: Surface Mount
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Compliant

IS43R32400D, IS43R16800D
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 weak driver
strength option, intended for lighter load and/or point--to--point environments. I--V curves for the normal drive strength
and weak drive strength are included in this datasheet.
EXTENDED MODE REGISTER DEFINITION
Extended Mode Register Definition
Integrated Silicon Solution, Inc.
Rev. 00D
06/22/09
BA1
BA1 BA0 Mode Register Definition
0
0
1
1
0
1
0
1
BA0
Program Mode Register
Program Extended Mode Register
Reserved
Reserved
A11
A10
Reserved
A9
(3)
A8
A7
A6
A6 A1 Drive Strength
0
0
1
0
1
1
A5
NOTES:
1. MSB depends on DDR SDRAM density.
2. A2 must be 0 to provide compatibility with early DDR devices
3. A logic 0 should be programmed to all unused/undefined ad-
4. This setting is available only for the x32 device
Reserved
Normal
Weak
Matched
dress bits to ensure future compatibility
A4
(4)
(3)
A3
A2
0
(2)
A1
A0 DLL
A0
0
1
Enable
Disable
Ext. Mode Reg. (Ex)
Address Bus (Ax)
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