NEC uPD78056Y User Manual
Page 78
78
CHAPTER 4 PIN FUNCTION (
µ
PD78054Y Subseries)
(2) Pins other than port pins (1/2)
Pin Name
Input/Output
Function
After Reset Alternate Function
INTP0
P00/TI00
INTP1
P01/TI01
INTP2
External interrupt request inputs with specifiable valid edges (rising
P02
INTP3
Input
edge, falling edge, both rising and falling edges).
Input
P03
INTP4
P04
INTP5
P05
INTP6
P06
SI0
P25/SB0/SDA0
SI1
Input
Serial interface serial data input
Input
P20
SI2
P70/RxD
SO0
P26/SB1/SDA1
SO1
Output
Serial interface serial data output
Input
P21
SO2
P71/TxD
SB0
Input/
P25/SI0/SDA0
SB1
output
P26/SO0/SDA1
SDA0
P25/SI0/SB0
SDA1
P26/SO0/SB1
SCK0
P27/SCL
SCK1
Serial interface serial clock input/output
Input
P22
SCK2
P72/ASCK
SCL
P27/SCK0
STB
Output
Serial interface automatic transmit/receive strobe output
Input
P23
BUSY
Input
Serial interface automatic transmit/receive busy input
Input
P24
RxD
Input
Asynchronous serial interface serial data input
Input
P70/SI2
TxD
Output
Asynchronous serial interface serial data output
Input
P71/SO2
ASCK
Input
Asynchronous serial interface serial clock input
Input
P72/SCK2
TI00
External count clock input to 16-bit timer (TM0)
P00/INTP0
TI01
Capture trigger signal input to capture register (CR00)
P01/INTP1
TI1
External count clock input to 8-bit timer (TM1)
P33
TI2
External count clock input to 8-bit timer (TM2)
P34
TO0
Output
16-bit timer (TM0) output (also used for 14-bit PWM output)
Input
P30
TO1
P31
TO2
P32
PCL
Output
Clock output (for main system clock and subsystem clock trimming)
Input
P35
BUZ
Output
Buzzer output
Input
P36
RTP0 to RTP7
Output
Real-time output port outputting data in synchronization with trigger
Input
P120 to P127
Serial interface serial data input/output
Input
Input
Input
Input/
output
8-bit timer (TM1) output
8-bit timer (TM2) output