# Change to GPIO mode
i gpio
# Set bank 0
w 99 04 01
# Clear bits (command 01) with mask 20 - clears P1.5 of Bank 0
w 99 01 20

# Go back to I2C mode
i i2cfast
# Set pins 21-24 as outputs
w 44 0E 0F
# Set pin 23 high (MCLK-MUX = PSIA)
w 44 06 7F