UPD784938 Datasheet, PDF (202/733 Pages) NEC – 16-Bit Single-Chip Microcontrollers

Figure 7-1. Real-Time Output Port Block Diagram
Internal bus
RTPC BYTE P0MH EXTR TRGP0 P0ML
INTC11
BYTE
4
4
Port 0 buffer registers
P0H
P0L
INTP0
INTC10
P0MH
4-bit real-time output (P0H)
8
Selector
4-bit real-time output (P0L)
Selector
4
4
8-bit real-time output (P0)
EXTR
TRGP0
P0ML
Output latch
P0
P07 P06 P05 P04 P03 P02 P01 P00