32:1 mux for thermistors

allows for over 5 thermistor reading per module

to replace old one

requires 4-5 GPIO outputs for logic control pins 1 GPIO for in/output pin -can all be wired into P6

old mux has clock and other things is this necessary or only because it was using one line of communication for selection?

Buffers

• to replace old one

  • in case we overload 5V reference from MCU

• to replace old one

  • buffers output from thermistor multiplexor

LDO

To replace old one

Mosfets - basically the same thing

To replace old one

Old Invertor? - might not be needed if we dont have SCLK going to GPIO from mux… in stock

Voltage regulation - in stock but only 300

Isolator - in stock

No longer needed since we found old MCUs:

SPI to isolated SPI convertor

convert to isolated spi for communication with other boards

MC33771BSP1AE

Sample Program - we need to sign up for an account

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5V at 5mA reference supply output

7GPIO pins

32:1 mux for thermistors

allows for over 5 thermistor reading per module

to replace old one

requires 5 GPIO outputs for logic control pins 15-19 and 1 GPIO for output pin D (43)

leaves only 1 GPIO pin from MC33771BSP1AE. Do we need chip select, write or enable pin?

• look into GPIO expanders!

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Buffer

to replace old one

in case we overload 5V reference from MC33771BSP1AE

Buffer

to replace old one

buffers output from thermistor multiplexor

SPI to isolated SPI convertor

convert to isolated spi for communication with other boards

Old Invertor? - might not be needed if we dont have SCLK going to GPIO from mux

Voltage regulation

to replace