
CHAPTER 2 PIN FUNCTIONS
User’s Manual U12768EJ4V1UD
41
(2) Non-port pins
(1/2)
Pin Name
I/O
PULL
Function
Alternate Function
A1 to A4
P110 to P113
A5 to A12
P100/RTP0 to P107/RTP7
A13
P34/TO0
A14
P35/TO1
A15
Output
Yes
Lower address bus used for external memory expansion
P36/TI4/TO4
A16 to A21
Output
No
Higher address bus used for external memory expansion
P60 to P65
AD0 to AD7
P40 to P47
AD8 to AD15
I/O
No
16-bit multiplexed address/data bus used for external
memory expansion
P50 to P57
ADTRG
Input
Yes
A/D converter external trigger input
P05/INTP4
ANI0 to ANI7
Input
No
P70 to P77
ANI8 to ANI11
Input
No
Analog input to A/D converter
P80 to P83
ASCK0
P15/SCK1
ASCK1
Input
Yes
Serial baud rate clock input for UART0 and UART1
P25
ASTB
Output
No
External address strobe signal output
P94
AVDD
—
Positive power supply for A/D converter
—
AVREF
Input
—
Reference voltage input for A/D converter
—
AVSS
—
Ground potential for A/D converter
—
BVDD
—
Positive power supply for bus interface
—
BVSS
—
Ground potential for bus interface
—
CLKOUT
Output
—
Internal system clock output
—
DSTB
Output
No
External data strobe signal output
P93/RD
HLDAK
Output
No
Bus hold acknowledge output
P95
HLDRQ
Input
No
Bus hold request input
P96
INTP0 to INTP3
External interrupt request input (analog noise elimination)
P01 to P04
INTP4
P05/ADTRG
INTP5
P06/RTPTRG
INTP6
Input
Yes
External interrupt request input (digital noise elimination)
P07
LBEN
Output
No
External data bus’s lower byte enable signal output
P90/WRL
NMI
Input
Yes
Non-maskable interrupt request input (analog noise
elimination)
P00
RD
Output
No
Read strobe signal output
P93/DSTB
RESET
Input
System reset input
—
RTP0 to RTP7
Output
Yes
Real-time output port
P100/A5 to P107/A12
RTPTRG
Input
Yes
RTP external trigger input
P06/INTP5
R/W
Output
No
External read/write status output
P92/WRH
RXD0
P13/SI1
RXD1
Input
Yes
Serial receive data input for UART0 and UART1
P23
SCK0
I/O
Yes
Serial clock I/O (3-wire type) for CSI0 to CSI2
P12/SCL
Note
PD703014AY, 703014BY, 703015AY, 703015BY, 703017AY, 70F3015BY, and 70F3017AY only
Remark
PULL: On-chip pull-up resistor