Datasheet

RL78/L12 CHAPTER 2 PIN FUNCTIONS
R01UH0330EJ0200 Rev.2.00 35
Dec 13, 2013
2.2.2 Description of Functions
Function Name I/O Function
COM0 to COM7 Output LCD controller/driver common signal outputs
SEG0 to SEG38 Output LCD controller/driver segment signal outputs
VL1, VL2, VL3, VL4
⎯
LCD drive voltage
CAPH, CAPL
⎯
Connecting a capacitor for LCD controller/driver
ANI0, ANI1, ANI16 to ANI23 Input A/D converter analog input (see Figure 11-38 Analog Input Pin Connection)
INTP0 to INTP17 Input External interrupt request input
Specified the valid edge: Rising edge, falling edge, or both rising and falling edges
KR0 to KR3 Input Key interrupt input
PCLBUZ0, PCLBUZ1 Output Clock output/buzzer output
REGC
⎯
Pin for connecting regulator output stabilization capacitance for internal operation. Connect
this pin to V
SS via a capacitor (0.47 to 1 μF).
Also, use a capacitor with good characteristics, since it is used to stabilize internal voltage.
RTC1HZ Output Real-time clock correction clock (1 Hz) 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
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
XT1, XT2
⎯
Resonator connection for subsystem clock
EXCLKS Input External clock input for subsystem clock
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