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Interesting 'new' PIC's

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Nigel Goodwin

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Recently I had an Email from MicroChip, with special offers on some development boards - and one was particularly cheap, so I ordered some.

The boards I got use the 40 pin 16F18877 (there's also a 28 pin 16F18855, but not on the development boards), it's an enhanced 16F device (like the 16F1827's I've been using) - but the main advantage is memory, it has 32K of 14 bit program memory, and 4K of RAM. It also has an internal clock of up to 32MHz, and a stunning array of peripherals - many of which I don't even understand :D .

I've currently got one running an ST7735 TFT display, and it seems pretty fast - the 16F1827 didn't have enough memory for the colour TFT's. I've also had it running a 5110 monochrome LCD as well, but memory requirements on those are quite small, although these now give enough RAM for a screen buffer.

So if you're looking for a cheap mid-range PIC with lot's of memory and facilities, it might be worth taking a look at the 16F18877 or 16F18855 devices.
 

Nigel Goodwin

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I rather missed out another major advantage of these chips, they include PPS (Peripheral Pin Select), this allows you to re-map many of the peripheral pins to a good number of different I/O pins. It's a feature that I've really liked on the 24F series, so it's nice to have it on a 16F.
 

be80be

Well-Known Member
I been playing with one of those for months it's a cool chip I ordered a bunch of the 16F18877 and the 16F18855
My development board has a 16F18855 you just copy the hex to a usb drive and it loads it to the chip. the programmer looks like a usb drive.

Features
  • Enhanced Mid-range Core with 49 Instruction, 16 Stack Levels
  • Adjustable Internal Oscillator (up to 32MHz)
  • 2x 10-bit PWMs
  • 5x Capture, Compare, PWM (CCP)
  • Complementary Waveform Generator (CWG)
  • Numerically Controlled Oscillator (NCO)
  • 4x Configurable Logic Controller (CLC)
  • 10-bit ADC with Computation (ADC2)
  • 5-bit Digital to Analog Converter (DAC)
  • Data Signal Modulator (DSM)
  • Zero Cross Detect (ZCD)
  • Cyclical Redundancy Check (CRC/SCAN)
  • Windowed Watchdog Timer (WWDT)
  • Peripheral Pin Select (PPS)
  • Enhanced Power-On/Off-Reset
  • Low-Power Brown-Out Reset (LPBOR)
  • Programmable Brown-Out Reset (BOR)
  • In Circuit Serial Programming (ICSP)
  • PIC16LF18877 (1.8V – 3.6V)
  • PIC16F18877 (2.3V – 5.5V)
Parameter Name
Value
Program Memory Type
Flash
Program Memory (KB)
56
CPU Speed (MIPS)
8
RAM Bytes
4,096
Data EEPROM (bytes)
256
Digital Communication Peripherals
1-UART, 2-SPI, 2-I2C
Capture/Compare/PWM Peripherals
5 CCP,
Timers
3 x 8-bit, 4 x 16-bit
ADC
35 ch, 10-bit
Comparators
2
Temperature Range (C)
-40 to 125
Operating Voltage Range (V)
1.8 to 5.5
Pin Count
40
Low Power
Yes
Cap Touch Channels
35
 
Last edited:

be80be

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Where do I send it I have 20% off the Curiosity Development Boards which come with the 16f18855
You got watch Arrow Electronics Inc too great deals on uC from microchip
 

be80be

Well-Known Member
I Really like this next on my list to play with.
Features. Modulates a carrier signal with digital data to create custom carrier synchronized output waveforms; Combine on and/or off-chip source signals; Polarity selection on output; Paired with the 16-bit PWM to create LED dimming engine. Freezes op amp compensation during “OFF”; LOAD disconnect ...
 

Nigel Goodwin

Super Moderator
Most Helpful Member
I been playing with one of those for months it's a cool chip I ordered a bunch of the 16F18877 and the 16F18855
My development board has a 16F18855 you just copy the hex to a usb drive and it loads it to the chip. the programmer looks like a usb drive.
Have you had any luck automating the process?, according to the instructions you can add an option to run 'after building' in MPLAB X so it automatically copies the HEX file to the board. However, I can't get it to work, and it ends with an error message.
 

be80be

Well-Known Member
It works with the mplab x on the cloud but I have to place it on my computer copy and paste
 

Nigel Goodwin

Super Moderator
Most Helpful Member
I've got it working OK now, the documentation said to use a back slash "cp ${ImagePath} J:\", using a forward slash "cp ${ImagePath} J:/" makes it work OK.

With that added MPLAB X compiles the code and loads it directly to the board, saving the 'drag and drop' routine.
 

be80be

Well-Known Member
It's a neat chip I've learned a lot with the mcc and that chip you can set it up in seconds with mcc.

And read the mcc .h files and learn a bunch.
 

Nigel Goodwin

Super Moderator
Most Helpful Member
It's a neat chip I've learned a lot with the mcc and that chip you can set it up in seconds with mcc.

And read the mcc .h files and learn a bunch.
I must admit I really don't like MCC :D

However, having said that, I do find it useful to generate things like clock oscillator settings and PPS, then cut and paste the parts I want out of the code. To be fair though, the PPS settings on the 16F18877 aren't half as confusing as those for the 24F series|!,
 

be80be

Well-Known Member
I can see that when it dont get things right its hard to find the mistakes.
 

granddad

Well-Known Member
The Old geezer did not get that 16F18877 dev bd email offer :( but i ordered a couple chips anyway ... Only tried MCC once that was enough ...
 

be80be

Well-Known Member
MCC not bad thing it let's you set the chip setting . Only part I didn't like is it name's thing wrong sometimes.
I Like to never figure a error out and it had named esuart1 there was no esuart1 only a esuart.
But to get just the values it's good for that changing port pins osc adc dac i2c it saves bunch of time.
 
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