Newsgroups: sci.electronics
Path: utzoo!utgpu!watserv1!vlsi!atschnei
From: atschnei@vlsi.waterloo.edu (Todd Schneider)
Subject: Data on Yamaha YM3805
Organization: University of Waterloo
Date: Fri, 10 Aug 90 20:49:18 GMT
Message-ID: <1990Aug10.204918.18791@vlsi.waterloo.edu>
Keywords: YM3805
Lines: 21

I'm planning on doing some modifications to a low-end CD player
(Teac PD-165) for research purposes. I'd like to add serial digital
output to the unit. It looks like the decoding/error correcting/etc.
chip - a Yamaha YM3805 has a straight serial out. However, the
Teac service manual gives only a block diagram of the device and
not all pin numbers are listed on the schematic.

Specifically, I'm interested in the output format of the SDO (Serial Data
Out ???) pin - it's the input to the digital filter so it should have
the data I'm after. Also, I'm interested in the output data format on the 
QOUT pin. I know its 4X oversampled and it appears that the data format is 
24 bits per channel plus a sync bit.

I'd also like some information on the timing of the SAMP1 and SAMP2 pins.

If anyone knows where (or if) I can get a data sheet on this chip or can
answer any of the above questions - I will be most grateful.

Thanks,
Todd.
(atschnei@vlsi.waterloo.edu)
