CHAPTER 2 PIN FUNCTIONS
(b) Control mode
P30 to P39 can be set to the port mode or control mode in 1-bit units by the port 3 mode control register
(PMC3).
P33 and P35 can be set to control mode 1 or control mode 2 in 1-bit units by the port 3 function control
register (PFC3).
(i) TXD0 (transmit data) ... Output
This is the serial transmit data output pin for UART0.
(ii) RXD0 (receive data) ... Input
This is the serial receive data input pin for UART0.
(iii) ASCK0 (asynchronous serial clock) ... Input
This is the serial baud rate clock input pin for UART0.
(iv) TI000, TI001, TI010 (timer input) ... Input
These are the external count clock input pins for the 16-bit timer.
(v) TO00, TO01 (timer output) ... Output
These are the pulse signal output pins for the 16-bit timer.
(vi) SDA0 (serial data) ... I/O
This is the serial transmit/receive data I/O pin for I2C0 (only for the µPD703216Y, 703217Y, and
70F3217Y).
(vii) SCL0 (serial clock) ... I/O
This is the serial clock I/O pin for I2C0 (only for the µPD703216Y, 703217Y, and 70F3217Y).
(4) P40 to P42 (port 4) ... I/O
Port 4 is a 3-bit I/O port for which input and output can be set in 1-bit units.
In addition to functioning as an I/O port, P40 to P42 can also be used for serial interface (CSI00) I/O in the
control mode.
The port mode and control mode can be selected as the operation mode for each bit, and are specified by the
port 4 mode control register (PMC4).
Normal output and N-ch open-drain output can be selected for P41 and P42.
(a) Port mode
P40 to P42 can be set to input or output in 1-bit units by the port 4 mode register (PM4).
(b) Control mode
P40 to P42 can be set to the port mode or control mode in 1-bit units by the PMC4 register.
(i) SO00 (serial output) ... Output
This is the serial transmit data output pin for CSI00.
(ii) SI00 (serial input) ... Input
This is the serial receive data input pin for CSI00.
User’s Manual U15862EJ3V0UD
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NEC [ NEC ]
