Levelshifter in SPI_Ethernet Demo

[Helmut]

Hello,
if somebody can explain to me why the levelshifter is inserted only for the wire "MISO" in the demosheet of the SPI-Ethernet ENC28J samples?
Best regards, Helmut

[Malcolm_M]

If VCC3 is 3 or 3.3V and VCC3.3 is 3.3V then there should be no need for level shifting.

The 74HCT245 is a tri-state octal bus buffer and not a true level convertor and the !OE (output enable active low) pin is not connected.

I think the 74HCT245 is only required if the micro is a 5V type.

Microchip datasheet: 'Required only if the microcontroller is operating at 5V. See Section 2.5 “I/O Levels” for more information.

- possibly an error on the schematic.

The ENC28J60 inputs are 5V tolerant, so if the micro is a 5V type only "MISO" an ENC28J60 output would need to be shifted from 3.3 to 5V levels.

[slavisa.zlatanovic]

Hi!

There is a little mistake in our schematic in the Help file of the mikroBasic PRO for PIC32 compiler.
Level translator is not required. Sorry for the inconvenience. We'll fix the schematic for the next compiler release.