RL78/G15 CHAPTER 2 PIN FUNCTIONS
R01UH0959EJ0110 Rev.1.10 Page 44 of 765
Mar 7, 2023
2.2.2 Pins for each product (pins other than port pins)
Function Name I/O Function
ANI0 to ANI10 Input A/D converter analog input (see Figure 10-23 Internal Equivalent Circuit of ANIn Pin).
VCOUT0, VCOUT1 Output Comparator output
IVCMP0, IVCMP1 Input Analog input for the comparator
IVREF0, IVREF1 Input Reference voltage input for the comparator
INTP0 to INTP7 Input
External interrupt request input pin for which the valid edge (rising edge, falling edge, or both
rising and falling edges) can be specified.
PCLBUZ0 Output Clock output/buzzer output
RESET
¯¯¯¯¯¯
Input This is the active-low system reset input pin.
When the external reset pin is not used, connect this pin directly or via a resistor to V
DD.
RxD0 Input Serial data input pin of serial interface UART0
TxD0 Output Serial data output pin of serial interface UART0
SCK00, SCK01 I/O Serial clock I/O pins of serial interfaces CSI00 and CSI01
SI00, SI01 Input Serial data input pins of serial interfaces CSI00 and CSI01
SO00, SO01 Output Serial data output pins of serial interfaces CSI00 and CSI01
SCL00, SCL01 Output Serial clock output pins of serial interface simple I
2
C (IIC00 and IIC01)
SDA00, SDA01 I/O Serial data I/O pins of serial interface simple I
2
C (IIC00 and IIC01)
SCLA0 I/O Clock I/O pin of serial interface IICA0
SDAA0 I/O Serial data I/O pin of serial interface IICA0
TI00 to TI07 Input The pins for inputting an external count clock/capture trigger to 16-bit timers 00 to 07
TO00 to TO07 Output Timer output pins of 16-bit timers 00 to 07
X1, X2 — Resonator connection for main system clock
EXCLK Input External clock input for main system clock
V
DD
— Positive power supply
V
SS
— Ground potential
TOOL0 I/O Data I/O for flash memory programmer/debugger
TOOLRxD Input UART reception pin for the external device connection used during flash memory programmer
TOOLTxD Output UART transmission pin for the external device connection used during flash memory programmer
Caution After reset release, the relationships between P40/TOOL0 and the operating mode are as follows.
Table 2-1. Relationships Between P40/TOOL0 and Operation Mode After Reset Release
P40/TOOL0 Operating mode
V
DD
Normal operation mode
0V Flash memory programming mode
For details, see 19.4.2 Flash memory programming mode.
Remark Use bypass capacitors (about 0.1 µF) as noise and latch up countermeasures with relatively thick wires at the
shortest distance to V
DD
to V
SS
line.
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