Learning to walk again. (18F46J50 configuration)

[Byte_Butcher]

WOW! Thanks Steve.

Now you have me thinking about trying the beast also

It's a big chunk of data sheet to read for sure. (554 pgs) It's a lot to absorb for someone of my... limited... skill level & experience.

You won't have any trouble I'm sure Dave.

I suppose the next step for me is to figure out how to make the USB work...


steve

[mackrackit]

USB is something I have not played with yet. It will be interesting to see how it goes.

Keep us posted...

[rsocor01]

This chip seems to be a nice upgrade to the more common USB-capable 18F4550. The 18F46J50 has 64 Kbytes of programming memory compared to 32 Kbytes of the 18F4550.

Also, the 18F46J50 has a very interesting feature which is "On-Chip USB Transceiver with Crystal-less operation". Which means "High-Precision Internal Oscillator (±0.15% typ.) for USB", so no need for an external crystal oscillator . I will keep this chip in mind for my own projects.

Now you have me thinking about trying the beast also

USB is something I have not played with yet. It will be interesting to see how it goes.

mackrackit,

Even a rookie like me got the USB working on a 18F4550, so you shouldn't have any problems. But, I do recommend starting with a 18F4550 chip, which is a lot easier to work with and it is well documented in this forum. The 18F46J50 chip seems to be a lot harder to make it work.

Robert

[Byte_Butcher]

Also, the 18F46J50 has a very interesting feature which is "On-Chip USB Transceiver with Crystal-less operation". Which means "High-Precision Internal Oscillator (±0.15% typ.) for USB", so no need for an external crystal oscillator . I will keep this chip in mind for my own projects.

Only low speed USB (1.5 Mbps) is supported in "crystal-less mode".
For full speed operation (12 Mbps) you'll need to use an external xtal.
Still... not bad.

And it's even got a RTCC calibration register that lets you "fine tune" the oscillator for the RTC.


steve

[Bruce]

Nice Steve. Where did you get the COG LCD display?

[Byte_Butcher]

Nice Steve. Where did you get the COG LCD display?

Digikey.
Steve likes Digikey.

http://search.digikey.com/scripts/Dk...0220az&stock=1

steve

[Bruce]

Thanks.

Steve likes Digikey.

I bet Digikey likes Steve too ehh...;o)

[rsocor01]

I suppose the next step for me is to figure out how to make the USB work...


steve

Steve,

Were you ever able to make the USB interface work in this 18F46J50 chip? Do you mind sharing your findings with us? I have been thinking about upgrading my 18F4550 to a 18F46J50.

Robert