Parallel microcontrollers PIC18LF4620

[Wond3rboy]

Hi has any one done any parallel data transfer using the Slave parallel port of PIc microcontrollers?One can use one of them as a slave and the other as a master right?Also what is the max length of the cable?

 

[Nigel Goodwin]

Hi has any one done any parallel data transfer using the Slave parallel port of PIc microcontrollers?One can use one of them as a slave and the other as a master right?Also what is the max length of the cable?

Never used it, and never seen much reason to - why are you wanting to?, it's not a particularly good way to connect two PIC's.

 

[Wond3rboy]

I want to transfer data from my sense board microcontroller to my transceiver microcontroller.I do this because i want more analog to digital converter pins+other processing.But i also think its too much work too.. will work with less AD's i think it will be fine.But will try it though in simulation.Just to learn it.

 

[Nigel Goodwin]

Then transfer it via a simple serial connection, only requires one pin (two if you want two way), and plenty fast enough. A parallel connection is far too wasteful on pins, for little or no gain.

 

[Wond3rboy]

I guess, the idea was bad but i bet you can use it in devices with multiplexed buses(primitive RTC's etc).Ofcourse, do some signals manually.

I say this because a multiplexed bus RTC is very easy too get but a serial RTC required me a trip to Karachi.

 

[blueroomelectronics]

RTC as in Real Time Clock?
You can do it easily in software.

 

[Wond3rboy]

Yeh one could, but i already have my hands full with all the crappy work that i am supposed to do for my project.May be i will do it.I have a DS1307 needing an external and a DS12887 with crystal encapsulated.Rather the having to provide external clock source to the 1307 i think i should work around the DS12887...Thanks.

 

[blueroomelectronics]

The DS12887 is meant for a microcomputer with an 8 bit bus, I'd take the trip to Karachi for a DS1307.

That said, any 8 bit I/O port on the PIC (PORTD is good) will work. You don't need the PSP hardware. You can also mux an LCD display on the same port if you like.

 

[Wond3rboy]

I do have the DS1307, easy to interface but requires external battery and crystal.Thanks.

 

[Wond3rboy]

Check this out

bq3287.

Its a DS1287/85 copy with integral battery and crystal.I know the DS12887 is not suitbale for me.

PS: The reason i was a bit cautious about the crystal was because the DS32 is not available here and i will use a crystal oscillator.

 

[blueroomelectronics]

I would think a SPI, I2C or 1wire RTCC would be better suited to a microcontroller, but you have enough I/O to use a parallel RTCC IC.