SLAS731D December 2011 – September 2018 MSP430F6720 , MSP430F6721 , MSP430F6723 , MSP430F6724 , MSP430F6725 , MSP430F6726 , MSP430F6730 , MSP430F6731 , MSP430F6733 , MSP430F6734 , MSP430F6735 , MSP430F6736
Up to nine 8-bit I/O ports are implemented. For 100-pin options, Ports P1 to P8 are complete, and P9 is reduced to 4-bit I/O. For 80-pin options, Ports P1 to P6 are complete, and P7, P8, and P9 are completely removed. Port PJ contains four individual I/O pins, common to all devices. All I/O bits are individually programmable.