Talk:LaFonera Hardware 32MB SDRAM MOD

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Daemondust (Talk | contribs)

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Is it possible to replace the [http://www.st.com/stonline/products/literature/ds/10987/m25p64.pdf m25p64] flash chip with the [http://www.st.com/stonline/products/literature/ds/12018/m25p128.pdf m25p128] to double the flash space? [[User:Daemondust|Daemondust]] 04:53, 23 Apr 2007 (CEST) Is it possible to replace the [http://www.st.com/stonline/products/literature/ds/10987/m25p64.pdf m25p64] flash chip with the [http://www.st.com/stonline/products/literature/ds/12018/m25p128.pdf m25p128] to double the flash space? [[User:Daemondust|Daemondust]] 04:53, 23 Apr 2007 (CEST)
 +
 +== Which type of SDRAM ==
 +
 +Hi to all.
 +The original SDRAM chip on the Fonera is a '''hynix HY57V281620ETP-H''' which features:
 +'''128 Mbit''' organized as '''4 banks''' x '''2 Mbit''' x '''16''', '''133 MHz'''
 +An ideal chip needed for the 32MB upgrade may be the '''hynix HY57V561620ETP-H''' which is:
 +'''256 Mbit''' organized as '''4 banks''' x '''4 Mbit''' x '''16''', '''133 MHz'''.
 +Unfortunately is difficult to buy single chips (or small amounts), so we prefer to use PC133 SDRAM modules (like a 512MB PC133 DIMM module - double sided, 8 chips per side - or 256MB PC133 SODIMM module - double sided, 4 chips per side - ).
 +The question is that not all chips from these modules are organized as '''4 banks''' x '''4 Mbit''' x '''16'''. For example, I saw a 512MB PC133 DIMM module with 16 '''Micron Technology MT48LC32M8A2BB-75''' which is organized as '''4 banks''' x '''8 Mbit''' x '''8''', '''133 MHz'''. Is it possible to do a Fonera RAM upgrade with this chip? (in other words: does the different organization of the same memory size make the difference?)

Revision as of 18:20, 12 May 2007

Is it possible to replace the m25p64 flash chip with the m25p128 to double the flash space? Daemondust 04:53, 23 Apr 2007 (CEST)

Which type of SDRAM

Hi to all. The original SDRAM chip on the Fonera is a hynix HY57V281620ETP-H which features: 128 Mbit organized as 4 banks x 2 Mbit x 16, 133 MHz An ideal chip needed for the 32MB upgrade may be the hynix HY57V561620ETP-H which is: 256 Mbit organized as 4 banks x 4 Mbit x 16, 133 MHz. Unfortunately is difficult to buy single chips (or small amounts), so we prefer to use PC133 SDRAM modules (like a 512MB PC133 DIMM module - double sided, 8 chips per side - or 256MB PC133 SODIMM module - double sided, 4 chips per side - ). The question is that not all chips from these modules are organized as 4 banks x 4 Mbit x 16. For example, I saw a 512MB PC133 DIMM module with 16 Micron Technology MT48LC32M8A2BB-75 which is organized as 4 banks x 8 Mbit x 8, 133 MHz. Is it possible to do a Fonera RAM upgrade with this chip? (in other words: does the different organization of the same memory size make the difference?)