RL78/G13 CHAPTER 2 PIN FUNCTIONS
R01UH0146EJ0100 Rev.1.00 82
Sep 22, 2011
(h) TO01, TO02
These are the timer output pins of 16-bit timers 01 and 02.
(i) TOOLTxD
This UART serial data output pin for an external device connection is used during flash memory programming.
(j) TOOLRxD
This UART serial data input pin for an external device connection is used during flash memory programming.
(k) SDA00, SDA11, SDA20
These are the serial data I/O pins of serial interface IIC00, IIC11 and IIC20.
(l) SCL00, SCL20
These are the serial clock output pins of serial interface IIC00 and IIC20.
(m) PCLBUZ1
This is the clock/buzzer output pin.
2.2.3 P20 to P27 (port 2)
P20 to P27 function as an I/O port. These pins also function as A/D converter analog input and reference voltage input.
Setting digital or analog to each pin can be done in A/D port configuration register (ADPC).
The following operation modes can be specified in 1-bit units.
(1) Port mode
P20 to P27 function as an I/O port. P20 to P27 can be set to input or output port in 1-bit units using port mode
register 2 (PM2).
(2) Control mode
P20 to P27 function as A/D converter analog input and reference voltage input.
(a) ANI0 to ANI7
These are the analog input pins (ANI0 to ANI7) of A/D converter.
When using these pins as analog input pins, see Figure 11-46. Analog Input Pin Connection.
(b) AV
REFP
This is a pin that inputs the A/D converter reference potential (+ side).
(c) AV
REFM
This is a pin that inputs the A/D converter reference potential (−side).
2.2.4 P30 to P37 (port 3)
P30 to P37 function as an I/O port. These pins also function as A/D converter analog input, external interrupt request
input, real-time clock correction clock output, serial interface data I/O, clock I/O, clock/buzzer output, and timer I/O.
Use of an on-chip pull-up resistor can be specified by pull-up resistor option register 3 (PU3).
When the P35 to P37 pins are used as input, specify them as either digital or analog in Port mode control register 3
(PMC3). This register can be specified in 1-bit unit.
The following operation modes can be specified in 1-bit units.
<R>
<R>
To Next Page
Loading...
Need help?
General
