IS43LD16640C datasheet(32/142 Pages) ISSI

tên linh kiện	IS43LD16640C

Giải thích chi tiết về linh kiện	1Gb (x16, x32) Mobile LPDDR2 S4 SDRAM

PDF	142 Pages

Scroll/Zoom	100%

nhà sản xuất	ISSI [Integrated Silicon Solution, Inc]

Trang chủ	http://www.issi.com

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IS43/46LD16640C

IS43/46LD32320C

Integrated Silicon Solution, Inc. — www.issi.com

Rev. C

07/02/2021

® Long-term Support

World Class Quality

Note: Exclusively for 8-bank devices.

Certain restriction on operation of 8 bank devices must be observed, One rule restricts the number

of sequential ACTIVATE commands that can be issued; the second provides additional RAS pre-

charge time for a PRECHARGE ALL command.

• The 8-Bank Device Sequential Bank Activation Restriction:No more than four banks can be ac-

tivated (or refreshed, in the case of REFpb) in a rolling tFAW window. To convert to clocks, divide

tFAW[ns] by tCK[ns], and round up to the next integer value. For example, if RU(tFAW/tCK) is 10

clocks, and an ACTIVATE command is issued in clock n, no more than three further ACTIVATE

commands can be issued at or between clock n + 1 and n + 9. REFpb also counts as bank activa-

tion for purposes of tFAW.

• The 8-Bank Device PRECHARGE ALL Provision: tRP for a PRECHARGE ALL command must

equal tRPab, which is greater than tRPpb

tFAW Timing (8-Bank Devices)

tFAW timing

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