serial-busspitexas instruments
The following text is from the TI TMS570LC4357 microcontroller features overview:
Five Multibuffered Serial Peripheral Interface (MibSPI) Modules
- MibSPI1: 256 Words with ECC Protection
- Other MibSPIs: 128 Words with ECC Protection
MibSPI seems to be a Texas Instruments term.
What is the difference between MibSPI vs SPI?
The physical layer is the same, right?
Can I connect standard SPI devices to the MibSPI module?
When it comes to these sorts of logic ICs, if you match the part number you'll match functionality. So, a 74HC595 from NXP should 'work' the same way as a 74HC595 from TI. The pins are given different nomenclature by the manufacturers, but they do map 1:1 between the ICs.
If there were a functionality difference, then there would be a corresponding change to the part number:
Consider the difference between a 74HC595 and a 74F595 - both do the same logic function, but the underlying technology of the IC is difference (HC is high-speed CMOS, F usually refers to Fast which generally implies Schottky construction). There can be differences in timing and logic voltage levels as you change technology.
Consider the difference between a 74HC595 and a 74HC596: the 595 is what you're using (8-bit shift register with output latches, three-state parallel outputs) whereas a 596 is slightly different (8-bit shift register with output latches, open-collector parallel outputs).
Of course, even with the same number, there likely is very minor variations between them. The fundamental functionality and speed will be compatible and unless you're really pushing the limits of the IC, you should be able to substitute with confidence. (That being said, always test!)
The timing diagrams should clear things up:
They are different packages for the IC. Page 2 of the datasheet shows that CP is a plastic DIP package, and CDR is a small outline package. The R at the end means the ICs come in a reel; if there is no R then they come in tubes.
Performance may depend on the package -- you'll have to check the electrical characteristics in the datasheet to see what the differences are and if they matter to you (the package will be listed at the top of the electrical characteristics table). The package choice is mostly dependent on which you would prefer to use.
Reels are used for large quantities. If you only need a couple hundred (or less) units then you just need tubes. There is no difference in performance between tubes vs. reels -- it's just a difference in how the ICs are shipped.
This is what a reel of ICs looks like:
This is what a tube of ICs looks like:
Best Answer
From the Reference Document:
It kind of is for your µc SPI communication what DMA is for memory, it allows you to offload some work from the CPU.