DocID027559 Rev 5 35/54
AN4661 Recommendations
53
6.7 Recommendations for the WLCSP180 package in the
STM32F769Ax/STM32F768Ax devices
These recommendations are required for the WLCSP180 package in the
STM32F769Ax/STM32F768Ax devices:
1. The NC (not-connected) balls must not be connected to GND nor to VDD.
2. The NC (not-connected) pins are not bounded. They must be configured by software to
output push-pull and forced to 0 in the output data register to avoid an extra current
consumption in low-power modes.
The list of NC pins is: PI8, PI12, PI13, PI14, PF6, PF7, PF8, PF9, PC2, PC3, PC4,
PC5, PI15, PJ0, PJ1, PJ2, PJ3, PJ4, PJ5, PH6, PH7, PJ12, PJ13, PJ14, PJ15, PG14,
PK3, PK4, PK5, PK6 and PK7.
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