
RL78/G13
CHAPTER 4 PORT FUNCTIONS
R01UH0146EJ0100 Rev.1.00
197
Sep 22, 2011
Figure 4-23. Block Diagram of P43, P44
P43/SCK01/SCL01,
P44/SI01/SDA01
WRPU
RD
WRPORT
PU43, PU44
EVDD
P-ch
PU4
P4
WRPM
PM4
POM43, POM44
POM4
WRPOM
PM43, PM44
CMOS
TTL
PIM4
PIM43, PIM44
WRPIM
Output latch
(P43. P44)
Selector
Alternate
function
Alternate
function
Internal
bus
P4:
Port register 4
PU4:
Pull-up resistor option register 4
PM4:
Port mode register 4
PIM4:
Port input mode register 4
POM4: Port output mode register 4
RD:
Read signal
WR
××: Write signal
<R>