SPI Question Re CKE, CKP for the Max6675

[Abraxas]

I am reading the section on SPI and on page 397, it says "There are four combinations possible using CKP/CKE .... The particular combination required is  slave device dependent..." Being that I am interested in building a project very similar to the reflow oven, using the MAX6675, can you please tell me which combination I am to use ? Thanks.

Charlie

[Jones, Bryan]

Charlie,

You need to look at the MAX6675 data sheet and look at what it expects in terms of a clock -- does it idle low or high; does it expect data on rising or falling edges? Match this to the CKP/CKE bits to get it working.

On Thu, Jun 23, 2016 at 5:57 PM, Abraxas <cmo...@hotmail.com> wrote:

I am reading the section on SPI and on page 397, it says "There are four combinations possible using CKP/CKE .... The particular combination required is  slave device dependent..." Being that I am interested in building a project very similar to the reflow oven, using the MAX6675, can you please tell me which combination I am to use ? Thanks.

Charlie

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[Abraxas]

Thank you. By the way, the MAX6675 is discontinued , or at least on it's way out. As best as I can tell, it's replacement is the MAX31855K.

On Wednesday, June 29, 2016 at 10:52:42 PM UTC-4, Bryan A. Jones wrote:

Charlie,

You need to look at the MAX6675 data sheet and look at what it expects in terms of a clock -- does it idle low or high; does it expect data on rising or falling edges? Match this to the CKP/CKE bits to get it working.

On Thu, Jun 23, 2016 at 5:57 PM, Abraxas <cmo...@hotmail.com> wrote:

I am reading the section on SPI and on page 397, it says "There are four combinations possible using CKP/CKE .... The particular combination required is  slave device dependent..." Being that I am interested in building a project very similar to the reflow oven, using the MAX6675, can you please tell me which combination I am to use ? Thanks.

Charlie

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