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UPD70F3116 Datasheet(PDF) 39 Page - NEC |
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UPD70F3116 Datasheet(HTML) 39 Page - NEC |
39 / 826 page CHAPTER 2 PIN FUNCTIONS 39 User’s Manual U14492EJ5V0UD (4) P30 to P37 (Port 3) … I/O Port 3 is an 8-bit I/O that can be set to input or output in 1-bit units. Besides functioning as an I/O port, in control mode, P30 to P37 operate as serial interface (UART0 to UART2) I/O. An operation mode of port or control mode can be selected for each bit and specified by the port 3 mode control register (PMC3). (a) Port mode P30 to P37 can be set to input or output in 1-bit units using the port 3 mode register (PM3). (b) Control mode P30 to P37 can be set to port or control mode in 1-bit units using PMC3. (i) TXD0 to TXD2 (Transmit data) … Output These pins output serial transmit data of UART0 to UART2. (ii) RXD0 to RXD2 (Receive data) … Input These pins input serial receive data of UART0 to UART2. (iii) ASCK1, ASCK2 (Asynchronous serial clock) … I/O These are UART1 and UART2 serial clock I/O pins. (5) P40 to P47 (Port 4) … I/O Port 4 is an 8-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, P40 to P47 operate as serial interface (CSI0, CSI1, FCAN) I/O. An operation mode of port or control mode can be selected for each bit and specified by the port 4 mode control register (PMC4). (a) Port mode P40 to P47 can be set to input or output in 1-bit units using the port 4 mode register (PM4). (b) Control mode P40 to P47 can be set to port or control mode in 1-bit units using PMC4. (i) SO0, SO1 (Serial output) … Output These pins output CSI0 and CSI1 serial transmit data. (ii) SI0, SI1 (Serial input) … Input These pins input CSI0 and CSI1 serial receive data. (iii) SCK0, SCK1 (Serial clock) … I/O These are CSI0 and CSI1 serial clock I/O pins. (iv) CTXD (Transmit data for controller area network) … Output This pin outputs FCAN serial transmit data. |
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