RL78/D1A User's Manual: Hardware - Renesas

Under development
Preliminary document
Specifications in this document are tentative and subject to change.
RL78/D1A CHAPTER 4 PORT FUNCTIONS
4.2.12 Port 13
48-pin products: P137 functions as a 1-bit Input port.
64-pin products: P137 functions as a 1-bit Input port.
80-pin products: P137 functions as a 1-bit Input port.
100-pin products: P130 functions as a 1-bit Output port, P131 to P136 function as a 6-bit I/O port, and P137
functions as a 1-bit Input port.
P130 is a 1-bit output-only port with an output latch.
P131 to P136 is a 6-bit I/O port with an output latch. P131 to P136 can be set to the input mode or output mode in 1-bit
units using port mode register 13 (PM13). When the P131 to P136 pins are used as an input port, use of an on-chip pullup
resistor can be specified in 1-bit units by pull-up resistor option register 13 (PU13).
P137 is a 1-bit input-only port.
Input to the P135 pin can be specified through a normal Schmitt3 input buffer or a Schmitt1 input buffer, using port
input mode register 13 (PIM13).
Output from the P136 pin can be specified as normal CMOS output or N-ch open-drain output (VDD tolerance), using
port output mode register (POM).
These pins also function as timer I/O, output pins for the sound generator, serial interface data I/O ,and segment signal
outputs for the LCD controller/driver.
To use P131 to P136 as the port function, refer Table 4-12.
P131 to P136 Pins LCDPF13 Alternate function
port function
P131
P132
P133
P134
P135
P136
Table 4-12. Setting of P131 to P136 Pins to port function
Register Timer/SGO Serial
R01UH0317EJ0004 Rev. 0.04 196
Feb. 22, 2013
PM13
Register
Input port N/A
- - Input mode
Output port
0 1 Output mode
Input port N/A
- N/A Input mode
Output port
0
Output mode
Input port N/A
- - Input mode
Output port
0 1 Output mode
Input port N/A
- - Input mode
Output port
0 1 Output mode
PIM13
Register
N/A N/A
N/A N/A
N/A N/A
N/A N/A
POM
Register
Remarks
Input port N/A
- N/A Input mode 0 N/A Schmitt1 input
Output port
0
Output mode 1
Schmitt3 input
Input port Digital I/O
- N/A Input mode N/A 0 CMOS output
Output port
selection
0
Output mode
1 N-ch OD output
- LCD
segment
output
selection
Reset signal generation sets port 13 to input mode.
Figures 4-41 to 4-48 show block diagrams of port 13.
- - - - - LCD
segment
output