
CHAPTER 4 PORT FUNCTIONS
User’s Manual U17854EJ9V0UD
112
Figure 4-15. Block Diagram of P41
P41/TOOL1
WRPU
RD
WRPORT
WRPM
PU41
PM41
EVDD
P-ch
PU4
PM4
P4
Output latch
(P41)
Selector
Internal
bus
Alternate
function
P4:
Port register 4
PU4:
Pull-up resistor option register 4
PM4:
Port mode register 4
RD:
Read signal
WR
××: Write signal