
CHAPTER 4 PORT FUNCTIONS
User’s Manual U17854EJ9V0UD
105
Figure 4-10. Block Diagram of P15
P15/RTCDIV/RTCCL
WRPU
RD
WRPORT
WRPM
PU15
PM15
EVDD
P-ch
PU1
PM1
P1
Output latch
(P15)
Selector
Internal
bus
Alternate
function
P1:
Port register 1
PU1:
Pull-up resistor option register 1
PM1:
Port mode register 1
RD:
Read signal
WR
××: Write signal