Parallel Input/Output Control
MCF51CN128 Reference Manual, Rev. 6
Freescale Semiconductor
9-3
•
Low drive strength selected (PT
x
DS[n] = 0)
•
Internal pull-ups disabled (PT
x
PE[n] = 0)
Two exceptions to this are the RESET and BKGD/MS pins, which have pull-ups enabled at reset.
9.1.5.2
Port J
Port J has only 6 pins, versus the usual 8, associated with it. Always write the upper two bits their reset
defaults described in the programming models sections.
9.1.5.3
RESET
RESET is an open drain signal, and cannot be programmed to an active high.
