My guess is that HD61747B1X is the display controller chip. I have searched
with altavista and hotbot, with no result... Try to check out hitatchi (or
what ever they are called)

Regards
Benjamin Petersen


> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Benjamin Marsh
> Sent: Thursday, May 13, 1999 9:22 AM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Anyone heard of a HD61747B1X
>
>
> Hiya,
> I know it isn't a PIC but you may be able to help...
>
> I have a Casio PB-770 handheld computer and there are two
> chips on board
> that are the closest to resembling the CPU and have the above code on
> them where X is a 3 on one and a 4 on the other. Then on the
> 13 there is
> a 5F 13 and the 14 has 5G 13 on it so I am assuming it is a 5Mhz chip.
>
> The question is - Can I use this computer to do anything to
> learn about
> microcontrollers? It has a RS-232c connector on it and a
> total of 32K of
> RAM. I want to use it to log data and output to screen and then PC and
> probably to a pic to use as a control system based on the
> data it logs.
>
> Thanks for your help in this matter.
>
> Ben Marsh
>
> BEngTech University of New England, Armidale, Australia
>