New chips PIC18F27J53 and PIC18F47J53

[ScaleRobotics]

You can also use the PIC18F67J50 which has 128K of programming space and has most of the features that you mentioned above. This chip is supported by PBP 2.60A. I recently got this chip, but I haven't tested it yet. I will use it when I get the TQFP-64 to DIP adapter.

Robert

Hi Robert,

I used the 67J50 a little on Olimex's LCD3310 board, and it is pretty nice. True, you do get a taste of some of the features with this chip ..... but ......

What I like about the 18F27j53's specs, is that you get the same memory/eeprom in a 6mm x 6mm chip. This is great for mini-data loggers, etc. Usually this capacity is on larger chips. Also, thinking small, I like the ability to run without an external crystal. This saves room for running the RTC (which the 67j50 doesn't have) off an external crystal. And it has something like 3 or 4 more timers, and 4 more pwm pins (you can never have too many timers or pwms!) Oh, and it has 12 bit ADC.

So you are right, I should probably pull out the 67J50 and get re-aquainted with it. Before I know it, PBP2.60B will be out, and I can try out a similar, smaller, but better 27j53.

[rsocor01]

What I like about the 18F27j53's specs, is that you get the same memory/eeprom in a 6mm x 6mm chip. This is great for mini-data loggers, etc. Usually this capacity is on larger chips. Also, thinking small, I like the ability to run without an external crystal. This saves room for running the RTC (which the 67j50 doesn't have) off an external crystal. And it has something like 3 or 4 more timers, and 4 more pwm pins (you can never have too many timers or pwms!) Oh, and it has 12 bit ADC.

Yes, you are right about these chips. They have some features that the 67J50 doesn't have. I have used the 18F46J50 and it has "On-Chip USB Transceiver with Crystal-less operation" but lacks many of the features that you need. Also, the 46J50 doesn't have internal EEPROM memory and it only has 64K in programming memory. The 12 bit ADC feature doesn't worry me too much. DT has posted somewhere in this forum an ADC averaging routine that will give you a very good higher accuracy for 10-bit ADC peripherals.

Anyways, I will take a closer look at these PIC18F27J53 and PIC18F47J53 chips. Thank you.

[ScaleRobotics]

I have used the 18F46J50 and it has "On-Chip USB Transceiver with Crystal-less operation"

Thanks Robert, I did not realize the 46J50 family could do that!