MC33771BSP1AE
Sample Program - we need to sign up for an account
SPI interface
7-14 cell readings per chip → 4 modules per AFE board and (try to order 4 chips for sample)
Voltage, Temperature and Current sensing
9.6V - 63V Vpwr could be powered by the cells it is monitoring as long as we only monitor 3 modules/chip (3*4series*4.2max = 50.4V 4*4series*4.2max = 67.2V)
or we plan to power the AFEs externally?
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!
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