OPT[5]:

--- Polarity when configured for DDSG (does not affect GPO mode)

--- --- 0 = selects active-high (DDSG is high when DSG is disabled)

--- --- 1 = selects active-low (DDSG is low when DSG is disabled)

OPT[4]:

--- Unused

OPT[3]:

--- 0 = output high drive uses REG18

--- 1 = output high drive uses REG1

OPT[2]:

--- 0 = weak pull-up to REG1 is disabled

--- 1 = weak pull-up to REG1 is enabled

--- NOTE - this should not be selected if OPT3=1

OPT[1]:

--- 0 = pin drives tri-state when controlled to be driven "hi" (not available when OPT[3] is set)

--- 1 = pin drives active-high when controlled to be driven "hi"

OPT[0]:

--- 0 = weak pulldown to VSS is disabled

--- 1 = weak pulldown to VSS is enabled

When a pin is selected for ADCIN or thermistor functionality, the OPT[5:0] bits are used as shown below.

OPT[5:4]

--- Pull-up control

--- --- 00 = selects 18-kOhm pull-up for thermistor measurement

--- --- 01 = selects 180-kOhm pull-up for thermistor measurement

--- --- 10 = selects no pull-up (used for ADCIN functionality)

OPT[3:2]

--- Polynomial selection for thermistor temperature measurement

--- --- 00 = selects the 18K Temperature Model

--- --- 01 = selects the 180K Temperature Model

--- --- 10 = selects the Custom Temperature Model

--- --- 11 = no polynomial is used, raw ADC counts are reported

OPT[1:0]

--- Measurement type

--- --- 00 = general purpose ADC input

--- --- 01 = thermistor temperature measurement, used for cell temperature protections

--- --- 10 = thermistor temperature measurement, reported but not used for protections

--- --- 11 = thermistor temperature measurement, used for FET temperature protection

0 = Unused

1 = General Purpose Output

2 = DDSG

3 = ADC Input or Thermistor