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Here we go.... (48G fixing and MEMORY UPGRADE)
05-25-2017, 06:44 AM (This post was last modified: 05-25-2017 06:58 AM by lemontea.)
Post: #8
RE: Here we go.... (48G)
The pinouts are a bit different. Will it be OK?

The original RAM chip has only 28 pins, so I am guessing the extra 4 pins on the 32 pin chip will be ignored?

I got the new part info from

http://www.finetune.co.jp/~lyuka/interes...hp48g.html

(Note that he has a typing mistake on the Web page for the Part # of the RAM chip. I checked the photograph of the chip itself for the Part #).

But the datasheet for the Cypress says it is NOT suitable for CMOS level, and only TTL level.

The existing RAM chip (on the 48G that I opened) is a Winbond CMOS chip.

UPDATE: The Datasheet on the Winbond says it is TTL compatible even though it is a CMOS chip. So, should be good.


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Messages In This Thread
RE: Here we go.... (48G) - lemontea - 05-24-2017, 11:17 PM
RE: Here we go.... (48G) - lemontea - 05-24-2017, 11:32 PM
RE: Here we go.... (48G) - lemontea - 05-24-2017, 11:37 PM
RE: Here we go.... (48G) - lemontea - 05-25-2017, 12:02 AM
RE: Here we go.... (48G) - mfleming - 05-25-2017, 02:19 AM
RE: Here we go.... (48G) - lemontea - 05-25-2017, 02:29 AM
RE: Here we go.... (48G) - lemontea - 05-25-2017 06:44 AM



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