CMS3216LAH datasheet(31/46 Pages) FIDELIX

31 / 46 page

Rev0.2, Aug. 2006

CMS3216LAx-75Ex

either enabled or disabled for that access. If auto precharge is

enabled, the row being accessed is precharged at the com-

pletion of the burst. During WRITE bursts, the first valid data-in

element will be registered coincident with the WRITE command.

Subsequent data elements will be registered on each

successive positive clock edge. Upon completion of a fixed-

length burst, assuming no other commands have been initiated,

the DQs will remain High-Z and any additional input data will be

ignored (see Figure 15.). A fullpage burst will continue until

terminated. (wrap around at the end of the page) An example is

shown in Figure 16. . Data n + 1 is either the last of a burst of

two or the last desired of a longer burst.

A WRITE command can be initiated on any clock cycle fol-

lowing a previous WRITE command. Full-speed random write

accesses within a page can be performed to the same bank,

as shown in Figure 17. , or each subsequent WRITE may be

performed to a different bank.

Figure 14. Write Command

CLK

CKE

/CS

/RAS

/CAS

/WE

A0-A8

A10

Write Command

High

Column

Address

Bank

Address

Enable Auto Precharge

Disable Auto Precharge

Don’t Care

CMS3216LAH Datenblatt(PDF) 31 Page - FIDELIX