Chapter 2 Pin Functions; Pin Function Tables; Normal Operating Mode - NEC uPD784038 Series User Manual

2.1 PIN FUNCTION TABLES

2.1.1 Normal Operating Mode

(1) Port pins (1/2)
Pin Name Input/Output
P00 to P07 Input/output
P10 Input/output
P11
P12
P13
P14
P15 to P17
P20 Input
P21
P22
P23
P24
P25
P26
P27
P30 Input/output
P31
P32
P33
P34 to P37
54

CHAPTER 2 PIN FUNCTIONS

Alternate Function
— Port 0 (P0):
• 8-bit input/output port
• Can be used as real-time output ports (4 bits × 2)
• Input/output specifiable bit-wise
• For input mode pins, on-chip pull-up resistor connection can be
specified at once by a software setting
• Transistor drive capability
PWM0
Port 1 (P1):
• 8-bit input/output port
PWM1
• Input/output specifiable bit-wise.
ASCK2/SCK2
• For input mode pins, on-chip pull-up resistor connection can be
specified at once by a software setting
RxD2/SI2
• LED drive capability
TxD2/SO2
—
NMI
Port 2 (P2):
• 8-bit input/output port
INTP0
• P20 cannot be used as a general-purpose port (non-maskable
INTP1
interrupt). Input level can be confirmed in the interrupt routine.
• For P22 to P27, on-chip pull-up resistor connection can be specified
INTP2/CI
by a software setting in 6-bit units
INTP3
• The P25/INTP4/ASCK/SCK1 pin operates as the SCK1 I/O pin in
accordance with the CSIM1 register specification
INTP4/ASCK/SCK1
INTP5
SI0
RxD/SI1 Port 3 (P3):
• 8-bit input/output port
TxD/SO1
• Input/output specifiable bit-wise
SCK0/SCL
• For input mode pins, on-chip pull-up resistor connection can be
specified at once by a software setting
SO0/SDA
TO0 to TO3
User's Manual U11316EJ4V1UD
Functions