I/O ports of PIC24HJ128GP306

[hayee]

Hi,
I wanna ask one question. I am using PIC24HJ128GP306 microcontroller.
In it only PORT B has complete 16 bits (B0 -> B15) other ports contains partial bits like (PORT C contains C1,C2,C12 -> C15),(PORT G contains G0->G3,G6->G9,G12->G15).
It means only PORT B input & output 16-bit data.
e.g

[Ttelmah]

You write some bits out one port, and then the others out another. However there is obviously a time penalty.
It's very unusual to want to be doing anything involving 16bit parallel data though. You could (for instance use an external shift register, and drive this from SPI. Given the speed this can be clocked it'll probably be faster than trying to split parts onto internal ports.

[temtronic]

I don't use the 24 series PICs but depending on the speed of data , sure ANY PIC can read/write 16 bits.

Simply create a function to read 1 port then the 2nd,saving in two inline mem locations. Use make16() if needed.

The 16 bits don't have to be 2 complete I/O ports either, can easily be split over 2-3-4 ports. Though the more ports the slower the function will be,but PICs are real fast these days!

The specs of the data transfer ( what's connected to the PIC) is important. Anything 'slow', say microseconds is not a problem, now nanosecond transfers could be.

Jay