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View Full Version : The second SCEI LSI in PSP

one
14-Dec-2004, 07:54
According to the Nikkei NE article (http://ne.nikkeibp.co.jp/members/NEWS/20041214/106836/) (reg required), the CXD1876 is a UMD signal processor LSI, while the CXD2962GG is the 90nm PSP SoC microcontroller which was disclosed (http://www.extremetech.com/article2/0,1558,1639233,00.asp) at the chip conference before, so basically the PSP spec is unchanged after the memory increase. The CXD2962GG is directly connected to the external Samsung DDR-SDRAM as you see on the board.

http://pc.watch.impress.co.jp/docs/2004/1212/psp38.jpg
Farid
14-Dec-2004, 08:11
Ok, so it answer the questions about the two big discrete IC present on the PSP motherboard.

The size of the CXD1 is quite surprising, i must say, it might be needed in order to help with the thermal dissipation though.
one
14-Dec-2004, 08:30
Ok, so it answer the questions about the two big discrete IC present on the PSP motherboard.

The size of the CXD1 is quite surprising, i must say, it might be needed in order to help with the thermal dissipation though.

Apparently the UMD controller LSI was developed by the MD developers (http://www.sony.co.jp/SonyInfo/Jobs/CHANCENavigator/students/ds_t_takayama.html) at Sony. How big is a typical DVD controller chip?
Mulciber
14-Dec-2004, 08:39
thats the size of the packaging
Guden Oden
14-Dec-2004, 09:05
The size of the CXD1 is quite surprising, i must say, it might be needed in order to help with the thermal dissipation though.

It's unlikely a UMD controller becomes warm to any noticeable degree. Besides, epoxy chip packages are very poor heat conductors (that's why high-power chips use flip-chip packages instead). The silicon chip inside might well be quite small, rather the chip seems to have a lot of pins instead due to its size, for some weird reason... :)