CHAPTER 4 PORT FUNCTIONS
Preliminary User’s Manual U16846EJ1V0UD
71
Figure 4-7. Block Diagram of P12 and P15
P12/SO10,
P15/TOH0
WR
PU
RD
WR
PORT
WR
PM
PU12, PU15
Output latch
(P12, P15)
PM12, PM15
PU1
PM1
Alternate
function
V
DD
P-ch
Selector
Internal bus
PU1:
Pull-up resistor option register 1
PM1:
Port mode register 1
RD: Read
signal
WR
××
: Write
signal