On Sat, Oct 06, 2007 at 10:46:44PM -0400, Robinson Tryon wrote: > Question about registers: > > In the datasheet for the FDC37M81x, registers 0x62,0x63 of COM2 have > values marked for their hard reset (0x00,0x00). In the 'Configuration > Register' column, there is a note that these two registers are > 'Reserved'. > > So, in this type of case should I mark the two registers with their > given value, 0x00, or should I use RSVD?
Either is fine, I guess. So far I let RSVD "override" everything else, i.e. as soon as I see a "Reserved" register, I make it RSVD, even if there's a default value in the datasheet. > What if the registers were marked with a dash (-) ? Usually I would > mark that as NANA, but if it's marked as reserved I assume I should > use RSVD instead. Yeah. > Oh -- and what about the chip rev? Usually there's no given value > (because it would change with each chip), so I would mark it MISC, but > I believe I saw that other people had marked the chip rev register as > NANA. Which is preferable, and why? NANA, because there's no default. MISC would also be possible, but I think NANA is more specific. It's a minor issue, though. Uwe. -- http://www.hermann-uwe.de | http://www.holsham-traders.de http://www.crazy-hacks.org | http://www.unmaintained-free-software.org
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