
CHAPTER 4 PORT FUNCTIONS
User’s Manual U15905EJ2V1UD
120
Figure 4-13. Block Diagram of P42
Internal
bus
WRPMC
RD
Address
SCK0 output
SCK0 input
SCL input
SCK0 output
enable signal
WRPORT
P42/SCK0/
SCL
PMC42
WRPFC
PFC42
Selector
WRPU
PU42
WRPM
PM42
Output latch
(P42)
WRPF
PF42
PMC4
PFC4
PU4
PM4
P4
PF4
EVDD
P-ch
EVDD
EVSS
P-ch
N-ch
SCL output
Caution
This pin does not have hysteresis characteristics in the port mode.
It has hysteresis characteristics only when an input-pin alternate function is used.
Remark
P4:
Port register 4
PM4:
Port mode register 4
PMC4: Port mode control register 4
PFC4: Port function control register 4
PF4:
Port function register 4
PU4:
Pull-up resistor option register 4