> This is in reference to: http://mamedev.org/source/src/mame/drivers/wiz.c.html > > Sorry if I'm posting in the incorrect place. I'm new and trying to figure this forum > and the ways things are done here. > > In there it states this: - There is unknown device (Sony CXK5808-55) on the board. > > I've been searching for info on this IC and have found it in the Ghosts n Goblins > schematic. > > It is a 1k x 8 RAM (I'm not 100% sure if it's considered bipolar or static...) in a > 22 pin package. It's not in ChipDir or out on any of the datasheet sites I've found > yet. Sony has no old datasheets on it either. > > The pinout is this: > > A6 - 1 22 - Vcc > A5 - 2 21 - A7 > A4 - 3 20 - A8 > A3 - 4 19 - A9 > A2 - 5 18 - /CE > A1 - 6 17 - /WE > A0 - 7 16 - D7 > D0 - 8 15 - D6 > D1 - 9 14 - D5 > D2 - 10 13 - D4 > Gnd- 11 12 - D3 > > It's funny... Capcom used only 256 x 8 in that chip. The upper 2 address lines are > grounded.
Thanks for bringing this issue to my attention.
This is also used in system1.c. http://mamedev.org/source/src/mame/drivers/system1.c.html
Agreed that going by the numbering scheme for Sony part numbers in this series, it should be 1K x 8-bit. Still, not guaranteed.
Every other chip in that series is CMOS Static RAM.
Guessing "55" is the access time (55ns) - available online from Asian part resellers seem to be -45, -50, and -55 versions.
22-pin packages don't seem to be available in the rest of the series, although you do see it in the 4-bit CXK54* series. However, I looked at a few of those and the pinouts are different.
Thanks for working out the pinouts, this will probably be added to the source or at least to Guru's/The Dumping Union's chip documents, if it isn't there already. (Well, it's RAM, so it's not normally needed to be dumped, etc.)
I'll eventually check out a few other sources I have access to for datasheets, but yes - so far, nobody has the datasheets.
PS. I found this auction in case you need to buy some: http://page2.auctions.yahoo.co.jp/jp/auction/b121957758 Rinkya: http://www.rinkya.com/new/en/auction-b121957758
- Stiletto
Edited by Stiletto (09/02/11 11:11 PM)
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