UPD784938 Datasheet, PDF (130/733 Pages) NEC – 16-Bit Single-Chip Microcontrollers

CHAPTER 6 PORT FUNCTIONS
Figure 6-12. Block Diagram of P10, P11, and P15 to P17 (Port 1)
WRPUOL
Pull-up resistor option register L
PUOL1
RDPUOL
VDD
WRPM1
RDPM1
Port 1 mode register
PM1n
WRP1
Internal
bus
RDP1
Output latch
P1n
P1n
n = 0, 1, 5 to 7
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Preliminary User’s Manual U13987EJ1V0UM00