
RL78/G13
CHAPTER 4 PORT FUNCTIONS
R01UH0146EJ0100 Rev.1.00
196
Sep 22, 2011
Figure 4-22. Block Diagram of P42
P42/TI04/TO04
WRPU
RD
WRPORT
WRPM
PU42
PM42
EVDD
P-ch
PM4
PU4
P4
Output latch
(P42)
Selector
Alternate
function
Alternate
function
Internal
bus
P4:
Port register 4
PU4:
Pull-up resistor option register 4
PM4:
Port mode register 4
RD:
Read signal
WR
××: Write signal