
RL78/G13
CHAPTER 4 PORT FUNCTIONS
R01UH0146EJ0100 Rev.1.00
181
Sep 22, 2011
Figure 4-11. Block Diagram of P14
P14/SI20/RxD2/SDA20
WRPU
RD
WRPORT
PU14
EVDD
P-ch
PU1
P1
WRPM
PM1
POM14
POM1
WRPOM
PM14
CMOS
TTL
PIM1
PIM14
WRPIM
Output latch
(P14)
Selector
Alternate
function
Alternate
function
Internal
bus
P1:
Port register 1
PU1:
Pull-up resistor option register 1
PM1:
Port mode register 1
PIM1:
Port input mode register 1
POM1: Port output mode register 1
RD:
Read signal
WR
××: Write signal