RL78/D1A User's Manual: Hardware - Renesas

Under development
Preliminary document
Specifications in this document are tentative and subject to change.
RL78/D1A CHAPTER 2 PIN FUNCTIONS
2.2.4 P30 to P37 (port3)
48-pin products: P30, P31, P33 function as a 3-bit I/O port.
64-pin products: P30 to P33 function as a 4-bit I/O port.
80-pin products: P30 to P37 function as an 8-bit I/O port.
100-pin products: P30 to P37 function as an 8-bit I/O port.
These pins also function as timer I/O, serial interface data I/O, and segment signal outputs for the LCD controller/driver.
Input to the P31 pin can be specified through a normal Schmitt3 input buffer or a Schmitt1 input buffer, using port input
mode register 1 (PIM3).
Output from the P30 and P31 pins can be specified as normal CMOS output or N-ch open-drain output (VDD tolerance)
in 1-bit units, using port output mode register (POM).
The following operation modes can be specified in 1-bit units.
(1) Port mode
48-pin products: P30, P31, P33 function as a 3-bit I/O port.
64-pin products: P30 to P33 function as a 4-bit I/O port.
80-pin products: P30 to P37 function as an 8-bit I/O port.
100-pin products: P30 to P37 function as an 8-bit I/O port.
P30 to P37 can be set to input or output port in 1-bit units using port mode register 3 (PM3). Use of an on-chip pull-up
resistor can be specified by pull-up resistor option register 3 (PU3).
(2) Control mode
P30 to P37 function as timer I/O, serial interface data I/O, and segment signal outputs for the LCD controller/driver.
(a) TI20 (P30) to TI27 (P37)
These are the pins for inputting an external count clock/capture trigger to 16-bit timers 20 to 27.
(b) TO20 (P30) to TO27(P37)
These are the timer output pins of 16-bit timers 20 to 27.
(c) SO00 (P32 in 80-pin and 100-pin product)
This is a serial data output pin of serial interface CSI00.
(d) SI00 (P33 in 80-pin and 100-pin product)
This is a serial data input pin of serial interface CSI00.
(e) SCK00 (P34)
This is the serial clock I/O pin of serial interface CSI00.
(f) SCL11 (P30)
This is a serial clock output pin of serial interface for simplified I2C.
(g) SDA11 (P31)
This is a serial data I/O pin of serial interface for simplified I2C.
(h) SEG6 (P30) to SEG13 (P37)
These are the segment signal output pins for the LCD controller/driver.
R01UH0317EJ0004 Rev. 0.04 42
Feb. 22, 2013