NEC PD78F9488 - Manual (Page 82)

CHAPTER 4 PORT FUNCTIONS
82
User’s Manual U15331EJ4V1UD
Figure 4-7. Block Diagram of P23
Internal bus
V
DD
P-ch
P23/SCK10
WR PUB2
RD
WR PORT
WR PM
PUB23
Alternate
function
Output latch
(P23)
PM23
Alternate
function
Selector
PUB2: Pull-up resistor option register B2
PM:
Port mode register
RD: Port 2 read signal
WR: Port 2 write signal