NEC PD78F9488 - Manual (Page 83)

CHAPTER 4 PORT FUNCTIONS
User’s Manual U15331EJ4V1UD
83
Figure 4-8. Block Diagram of P24
Internal bus
V DD
P24/SO10
WR PUB2
RD
WR PORT
WR
PM
PUB24
Alternate
function
Output latch
(P24)
PM24
Selector
P-ch
PUB2: Pull-up resistor option register B2
PM:
Port mode register
RD: Port 2 read signal
WR: Port 2 write signal