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
WR
PU
RD
WR
PORT
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