LMAO!
They changed the "Atom Interpreter IC" to "BasicNano X ##" and toss out the old data sheets! Then they direct everyone to an info-free page while (hopefully) writing decent data sheets for the 28-pin and 40-pin X chip.
(*sigh*)
Look, the processors are largely the same. The 28-pin PICs are PIC16F886s and the 40-pin chips are PIC16F887s. The main differences that come to mind are:
1. The Nanos use internal 8MHz clocks, while the X chips use external 20MHz crystals or resonators. The crystals need 18 to 22 pF caps to ground, the resonators have them built in. For this reason, the X chips run 2.5x faster than the 8MHz Nanos. Thus, PWM, PULSIN, serial ports, etc., all run 2.5x faster.
2. Because of the need for two pins to use an external clock device, the X chips lack a P32 and P33 I/O pin, which the Nanos have.
I supply two PDF sheets here for the old interpreter ICs here. You'll see the pinouts are largely the same between the parts. The interpreter sheets have a better description of how to make a MAX232 RS232 level-shifter IC work with these PICs. Both chips use the single-pin programming/serial comms system.
Have a nice project.
Attachment:
Atom40Chip.pdf [283.05 KiB]
Downloaded 62 times
Attachment:
Atom28BChip VerB.pdf [216.54 KiB]
Downloaded 75 times
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