UPD784938 Datasheet, PDF (128/733 Pages) NEC – 16-Bit Single-Chip Microcontrollers

CHAPTER 6 PORT FUNCTIONS
Internal
bus
WRPUOL
RDPUOL
WRPM1
RDPM1
Figure 6-10. P13 (Port 1) Block Diagram
Port 1 mode register
PM13
Pull-up resistor option register L
PUOL1
VDD
WRPMC1
RDPMC1
WRP1
RDP1
Port 1 mode control register
PMC13
Output latch
P13
P13
SI2, RxD2 input
128
Preliminary User’s Manual U13987EJ1V0UM00