Part Number:AMC7836
My question is, does the AMC7836’s SPI protocol allow me to chain the AMC7836’s serially like chaining together shift registers?
For example, each AMC7836 SPI interface has 24 binary bits (6 hex numbers). I would like to chain three AMC7836’s serially so that a SPI command to all three looks like the table below, which has 18 hex numbers (6 per AMC7836).
AMC7836 #1 | AMC7836 #2 | AMC7836 #3 | |||||||||||||||
Hex 1A | Hex 1B | Hex 1C | Hex 1D | Hex 1E | Hex 1F | Hex 2A | Hex 2B | Hex 2C | Hex 2D | Hex 2E | Hex 2F | Hex 3A | Hex 3B | Hex 3C | Hex 3D | Hex 3E | Hex 3F |
I would like to chain the three AMC7836’s serially in this manner, so that I can write another 18 hex numbers to them, which pushes out the previous 18 hex numbers allowing me to read the previous command. Below is an example:
current state | |||||||||||||||||||||
AMC7836 #1 | AMC7836 #2 | AMC7836 #3 | |||||||||||||||||||
Hex 1A old | Hex 1B old | Hex 1C old | Hex 1D old | Hex 1E old | Hex 1F old | Hex 2A old | Hex 2B old | Hex 2C old | Hex 2D old | Hex 2E old | Hex 2F old | Hex 3A old | Hex 3B old | Hex 3C old | Hex 3D old | Hex 3E old | Hex 3F old | ||||
Transition | AMC7836 #1 | AMC7836 #2 | AMC7836 #3 | prior hex back to PC via SDO → | |||||||||||||||||
in-process command from PC to AMC7836 SDI → | Hex 3D new | Hex 3E new | Hex 3F new | Hex 1A old | Hex 1B old | Hex 1C old | Hex 1D old | Hex 1E old | Hex 1F old | Hex 2A old | Hex 2B old | Hex 2C old | Hex 2D old | Hex 2E old | Hex 2F old | Hex 3A old | Hex 3B old | Hex 3C old | Hex 3D old | Hex 3E old | Hex 3F old |
New state | |||||||||||||||||||||
AMC7836 #1 | AMC7836 #2 | AMC7836 #3 | |||||||||||||||||||
Hex 1A new | Hex 1B new | Hex 1C new | Hex 1D new | Hex 1E new | Hex 1F new | Hex 2A new | Hex 2B new | Hex 2C new | Hex 2D new | Hex 2E new | Hex 2F new | Hex 3A new | Hex 3B new | Hex 3C new | Hex 3D new | Hex 3E new | Hex 3F new | ||||
Does the AMC7836 support this?
Thank you.