
CHAPTER 4 PORT FUNCTIONS
User’s Manual U15905EJ2V1UD
111
Figure 4-9. Block Diagram of P31
Internal
bus
WRPMC
RD
Address
SO1 output
TXD0 output
WRPORT
P31/SO1/
TXD0
PMC31
WRPMC
PFC31
Selector
WRPU
PU31
WRPM
PM31
Output latch
(P31)
WRPF
PF31
PMC3
PFC3
PU3
PM3
P3
PF3
EVDD
P-ch
EVDD
EVSS
P-ch
N-ch
Remark
P3:
Port register 3
PM3:
Port mode register 3
PMC3: Port mode control register 3
PFC3: Port function control register 3
PF3:
Port function register 3
PU3:
Pull-up resistor option register 3