Using M6242B instead of RP5C01

[bebek]

I bought A4000 and found that battery leaked and damaged tracks and via's around. Repaired tracks, deactivated acid, cleaned. Then I thought I replace the battery with battery coin. Found socket from old PC board and fit. Then I noticed that it is wrong way around and unfortunately it killed a clock IC (it was 2 o'clock in the morning). Quick search on internet and found a clock for only £25 - DAYLIGHT ROBBERY . I have many M6242B and decided to use one of these. Small adapter in form of the spider and it works like a charm . For every one who wants to do the same:

M6242B---RP5C01
1---------15
2---------1
3---------3
4---------4
5---------5
6---------6
7---------7
8---------8
9---------9
10--------10
11--------14
12--------13
13--------12
14--------11
15--------2
16--------16
17--------17
18--------18

Instead of R179 I fit a diode with anode connected to battery and for battery I use two CR2016 (160mAh). All of it gives top 5.4V which is safe for M6242B.

[amigakit.com]

Interesting mod. Thanks.


We sell the original new RP5C01 at a much cheaper price that you were quoted.

[alexh]

You can also get them cheap from the MSX scene who also use this chip.

[bebek]

Not good. Worked for 3 days and batteries went flat . Without batteries only 1.8V on pin 18. Something is bad. I do not recommend this mod until I find what happened. The only change I have done is putting board back to case yesterday.

It is ok to replace the IC as I said before with standard recharchable battery, looks like the power mod I did is not right and will change it soon.

[Cosmos]

Any news ?

Working now ??

[bebek]

The clock is working no problem only batteries were wrong. If you use standard battery or same like PC with diode it is fine. Cheap IC replacement.

Hi, I'm struggling with a bad battery too. I've never posted here before, but a long time stupid question asker over at amiga.org.

To the chase, I have an A3000D with bad, um bad tracks. No tracks to speak of really. I have been studying the RTC chip here:

http://picasaweb.google.com/lh/photo...eat=directlink

and

http://pdf1.alldatasheet.com/datashe...H/RP5C01A.html

My thought / question is, could I simply hook up a battery to pins 9 (GND) and 18 (Vcc takes power up to 5V+) and get the clock to keep time again? Also thought that a small piggy back board could be built to go into the socket; a work around for the battery damage altogether.

I guess I don't understand when the battery is in use or being charged and so on.

Ideas?

Go Jenson Button!

[orange]

but if all tracks are broken, how will amiga read time from RTC?

[SpeedGeek]

The A3000 stores SCSI preferences data in the RP5C01 memory. So it would be a good idea to compare the specs of any subsitute for the RP5C01.