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
4.2.2 Port 1
48-pin products: P10 to P14 function as a 5-bit I/O port.
64-pin products: P10 to P15 and P17 function as a 7-bit I/O port.
80-pin products: P10 to P17 function as an 8-bit I/O port.
100-pin products: P10 to P17 function as an 8-bit I/O port.
Port 1 is an 8-bit or a 7-bit, or a 5-bit I/O port with an output latch. Port 1 can be set to the input mode or output mode in
1-bit units using port mode register 1 (PM1). When the P10 to P17 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 1 (PU1).
Input to the P10, P11, and P17 pins can be specified through a normal Schmitt3 input buffer or a Schmitt1 input buffer
using port input mode register 1 (PIM1).
These pins also function as serial interface data I/O, timer I/O, clock I/O, external interrupt request input and segment
signal outputs for the LCD controller/driver.
To use P10 to P17 as the port function, refer Table 4-3.
Table 4-3. Setting of P10 to P17 Pins to port function
P10 to P17 Pins LCDPF1
Alternate
Register
function
port function
Timer Serial
P10
P11
P12
P13
P14
P15
P16
P17
R01UH0317EJ0004 Rev. 0.04 153
Feb. 22, 2013
PM1
Register
Input port Digital I/O selection
- - Input mode
Output port
0 1 Output mode
Input port Digital I/O selection
- N/A Input mode
Output port
0
PIM1
Register
Output mode -
Input port Digital I/O selection
- - Input mode
Output port
0 1 Output mode
Input port Digital I/O selection
- - Input mode
Output port
0 1 Output mode
Input port Digital I/O selection
- N/A Input mode
Output port
0
Output mode
Input port Digital I/O selection
- - Input mode
Output port
0 1 Output mode
Input port Digital I/O selection
- N/A Input mode
Output port
0
Output mode
Input port Digital I/O selection
- N/A Input mode
Output port
- - LCD segment
output selection
Reset signal generation sets port 1 to input mode.
Figures 4-7 to 4-11 show block diagrams of port 1.
0
Output mode -
POM
Register
Remarks
0 N/A Schmitt1 input
1 Schmitt3 input
0 N/A Schmitt1 input
1 Schmitt3 input
N/A N/A
N/A N/A
N/A N/A
N/A N/A
N/A N/A
0 N/A Schmitt1 input
1 Schmitt3 input
- - - - - LCD segment
output