CHAPTER 2 PIN FUNCTIONS
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User’s Manual U15195EJ5V0UD
(4) P30 to P34 (Port 3) … I/O
P30 to P34 function as a 5-bit I/O port in which input or output can be set in 1-bit units.
Besides functioning as an I/O port, in control mode, P30 to P34 operate as serial interface (UART0,
UART1/CSI1) I/O.
Port or control mode can be selected as the operation mode for each bit, specified by the port 3 mode control
register (PMC3). The selection of UART/SCI1 is specified by the port 3 function control register (PFC3).
(a) Port mode
P30 to P34 can be set to input or output in 1-bit units using the port 3 mode register (PM3).
(b) Control mode
P30 to P34 can be set to port or control mode in 1-bit units using PMC3.
(i) TXD0, TXD1 (Transmit data) … Output
These pins output serial transmit data of UART0 and UART1.
(ii) RXD0, RXD1 (Receive data) … Input
These pins input serial receive data of UART0 and UART1.
(iii) ASCK1 (Asynchronous serial clock) … I/O
This is UART1 serial clock I/O pin.
(iv) SO1 (Serial output) … Output
This pin outputs serial transmit data of CSI1.
(v) SI1 (Serial input) … Input
This pin inputs serial receive data of CSI1.
(vi) SCK1 (Serial clock) … I/O
This pin is CSI1 serial clock I/O pin.
Содержание PD703114
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