UPD784938 Datasheet, PDF (142/733 Pages) NEC – 16-Bit Single-Chip Microcontrollers

CHAPTER 6 PORT FUNCTIONS
Figure 6-25. Pull-Up Specification (Port 2)
VDD
P22
P23
P24
Input
Internal
buffer
bus
P25
P26
P27
PUOL2
Pull-up resistor option register L (PUOL)
Caution As P22 to P26 are not pulled up immediately after a reset, an interrupt request flag may be set depending
on the function of the alternate function (INTP1 to INTP5). Therefore, the interrupt request flags should
be cleared after specifying pull-up in the initialization routine.
142
Preliminary User’s Manual U13987EJ1V0UM00