Datasheet

CHAPTER 2 PIN FUNCTIONS
User’s Manual U18698EJ1V0UD
30
(2) Non-port pins (2/2)
Function Name I/O Function After Reset Alternate Function
RESET Input System reset input
− −
RTCDIV Output Real-time counter clock (32 kHz divided frequency) output Input port
P33/TI000/RTCCL
/BUZ/INTP2
RTCCL Output Real-time counter clock (32 kHz original oscillation) output Input port
P33/TI000/RTCDIV
/BUZ/INTP2
RTC1HZ Output Real-time counter clock (1 Hz) output Input port
P34/TI52/TI010/
TO00/INTP1
RxD0 P12/KR3/<RxD6>
RxD6 P113/SEG7
<RxD6>
Input Serial data input to asynchronous serial interface Input port
P12/RxD0/KR3
TI000
External count clock input to 16-bit timer/event counter 00
Capture trigger input to capture registers (CR000, CR010) of
16-bit timer/event counter 00
P33/RTCDIV/
RTCCL/BUZ/
INTP2
TI010
Input
Capture trigger input to capture register (CR000) of 16-bit
timer/event counter 00
Input port
P34/TI52/TO00/
RTC1HZ/INTP1
TI52 Input External count clock input to 8-bit timer/event counter 52 Input port
P34/TI010/TO00/
RTC1HZ/INTP1
TO00 Output 16-bit timer/event counter 00 output Input port
P34/TI52/TI010/
RTC1HZ/INTP1
TOH0 8-bit timer H0 output P32/MCGO
TOH1
Output
8-bit timer H1 output
Input port
P31/INTP3
TxD0 P13/KR4/<TxD6>
TxD6 P112/SEG6
<TxD6>
Output Serial data output from asynchronous serial interface Input port
P13/TxD0/KR4
EXLVI Input Potential input for external low-voltage detection Input port P120/INTP0
X1 Input P121/OCD0A
X2
−
Connecting resonator for main system clock Input port
P122/EXCLK/
OCD0B
EXCLK Input External clock input for main system clock Input port P122/X2/OCD0B
XT1 Input P123
XT2
−
Connecting resonator for subsystem clock Input port
P124
VDD
−
Positive power supply
− −
VSS
−
Ground potential
− −
FLMD0
−
Flash memory programming mode setting
− −
OCD0A Input P121/X1
OCD0B
−
On-chip debug mode setting connection Input port
P122/X2/EXCLK
Remark The functions within arrowheads (< >) can be assigned by setting the input switch control register (ISC).