CHAPTER 2 PIN FUNCTIONS
User’s Manual U15109EJ3V0UD
79
(15) P150 to P157 (port 15) ··· 3-state I/O
P150 to P157 function as an 8-bit I/O port in which input and output can be specified in 1-bit units.
In addition to I/O port pins, these pins can also be used as I/O pins for the serial interface and the timer/counter.
(a) Port function
P150 to P157 can be set to input or output in 1-bit units using the port 15 mode register (PM15).
(b) Alternate functions
(i)
RXD3 (receive data 3) ... Input
This is the serial receive data input pin for UART3.
(ii)
TXD3 (transmit data 3) ... Output
This is the serial transmit data output pin for UART3.
(iii) ASCK3 (asynchronous serial clock 3) ... Input
This is the serial baud rate clock input pin for UART3.
(iv) TI110 (timer input 110) ... Input
This is the external count clock input and external capture trigger input pin for timer 11.
(v)
TI111 (timer input 111) ... Input
This is the external capture trigger input pin for timer 11.
(vi) TI120 (timer input 120) ... Input
This is the external count clock input and external capture trigger input pin for timer 12.
(vii) TI121 (timer input 121) ... Input
This is the external capture trigger input pin for timer 12.
(viii) TO12 (timer output 12) ... Output
This is the pulse signal output pin for timer 12.