UPD784938 Datasheet, PDF (136/733 Pages) NEC – 16-Bit Single-Chip Microcontrollers

CHAPTER 6 PORT FUNCTIONS
Figure 6-19. Pull-Up Resistor Specification (Port 1)
VDD
P17
P16
P15
Input
buffer
Internal
bus
P11
P10
(PUOL)
PUOL1
Port 1 mode register
(PM1)
6.3.5 Direct LED drive
In port 1, the output buffer low-level side drive capability has been reinforced allowing active-low direct LED drive. An example
of such use is shown in Figure 6-20.
Figure 6-20. Example of Direct LED Drive
VDD
µPD784938
P1n
(n = 0 to 7)
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Preliminary User’s Manual U13987EJ1V0UM00