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Hello again,
I need an 8051 variant which can handle USB2.0 (Full or High-Speed) and has a full 16-bit external address space (w/ data-bus of course): I shall be bank-switching for a 2Mx8 storage area.
I don't mind splitting the design into a small (very small USB to UART) mated to a high-pin-count 8051 flavored IC. Naturally power-consumption is a huge issue: LOW POWER.
I was going to use ST-Microelectronics uPSD3454x but they are discontinuing it. Now I must convert the design over to a [production] part.
I concidered using Actel's FPGA with embedded Core8051 or Cortex M-1, but the demanding qualities of the project prohibit that avenue at this time.
I've been looking at SilLabs, yet many of the bells-n-whistles aren't needed.
Requirement 1.0 --------------- Low Power--Battery Operated with USB charge capability
Requirement 1.0.1 ----------------- Sleep Mode, and Power-down mode (wake-up on NMI)
Requirement 1.0.2 ----------------- Capable of data-logging for 24+ hours at 'full operation'
Requirement 1.1 --------------- Needs to address up to (and maybe more than) 2Mx8 external low-power RAM
Requirement 1.2 --------------- USB is the primary mode of PC\device communication. Requirement 1.2.1 ----------------- USB 1.1 would suffice for such low content (2Mx8)
Requirement 1.3 --------------- Capable of interfacing to an FPGA for dual User Graphics 162 x 96 [each] engine
A low-power ARM [Cortex] would be a possibility, but I think it is over-kill.
Q1) What is a high-pin count, low-power 8051 with Flash (64k would be nice)? Q2) What is the smallest and lowest power USB to UART device.
I figured that erik, per, Andy, and Tamir might have a quick answer... and not the Keil parametric search.
Sincerely,
--Cpt. Vince Foster 2nd Cannon Place Fort Marcy Park, VA
I shall take a peek at the Stellaris parts. Thanks for the suggestion. IF Andy seconded the part's support, then it must be worth checking into.
Sounds like you had some fun with that project. I do plan on having fun with mine... even though it is intended for the commercial market (headaches).
Thanks again guys.
Also, I'd like to mention that it is a home project, so I have to fight for time between the wife and kids. I used Protel DXP at home while Altium Designer here at work. (Yes, I have the full-blown Keil ARM/C51 at home, and 'soon' I'll have it here at work. I just need to complete the schematics and PWB first).
I can't mix the two projects, although the IP rolling around in my head may bleed over into one another.
At work, I'm using Ti DSPs, and ARM Cortex M-3, Actel ProASIC3E, and possibly a Xilinx part (I'm not fond of Xilinx though).
The home prototype is a proof of concept, so although I touted low-power, I must be able to prove a migration path to 'lowest power' for some Venture Capitol monies. (which, due to the Obambi Economy is rather hard to come by).