RL78/G1P
CHAPTER 4 PORT FUNCTIONS
R01UH0895EJ0100 Rev.1.00
74
Nov 29, 2019
For example, figures 4-7 to 4-11 show block diagrams of port 3 for 32-pin products.
Figure 4-7. Block Diagram of P30
P30/INTP2/TxD0/
TOOLTxD/SO00
WR
PU
RD
WR
PORT
WR
PM
PU30
Output latch
(P30)
PM30
V
DD
P-ch
PU3
PM3
P3
Alternate
function
Internal bus
Selector
Alternate
function
P3:
Port register 3
PU3:
Pull-up resistor option register 3
PM3:
Port mode register 3
RD: Read
signal
WR
: Write
signal