IS43R32800B-5B-TR ISSI, Integrated Silicon Solution Inc, IS43R32800B-5B-TR Datasheet - Page 36

• Manufacturer Part Number: IS43R32800B-5B-TR
• Description: IC DDR SDRAM 256MBIT 144BGA
• Manufacturer: ISSI, Integrated Silicon Solution Inc

Specifications of IS43R32800B-5B-TR

• Format - Memory: RAM
• Memory Type: DDR SDRAM
• Memory Size: 256M (8Mx32)
• Speed: 200MHz
• Interface: Parallel
• Voltage - Supply: 2.4 V ~ 2.6 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 144-BGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

IS43R32800B
36
S ELF
Self -refresh mode is entered by issuing a REF S command (/CS=/RA S=/CAS =L ,/WE =H,C KE =L ).
Once the self-refresh is initiated, it is maintained as long as C KE is kept low. During the self-
refresh mode, CK E i s asynchronous and the only enable input , all other inputs including CL K a re
disabled and ignored, so that power consumption dueto synchronous inputs is saved. T o exit the
self-refresh, supplying stable CLK inputs, asserting DESEL or NOP command and then asserting
CK E f or longer than tX SNR/ tXSRD.
BA 0,1
A0-1 1
/RAS
/CAS
/CLK
CL K
CK E
REFRESH
/WE
/CS
Self Refresh Exit
Self-R efresh
Integrated Silicon Solution, Inc. — www.issi.com
tX SN R
X
X
tX SR D
Y
Y
Rev. 00D
03/19/08