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UPD70F3217A 데이터시트(PDF) 66 Page - NEC |
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UPD70F3217A 데이터시트(HTML) 66 Page - NEC |
66 / 757 page CHAPTER 2 PIN FUNCTIONS User’s Manual U15862EJ3V0UD 66 2.3 Description of Pin Functions 2.3.1 V850ES/KF1 (1) P00 to P06 (Port 0) ... I/O Port 0 is a 7-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, P00 to P06 can also be used for NMI input, external interrupt request input, and timer H output in the control mode. The port mode and control mode (alternate functions) can be selected as the operation mode for each bit, and are specified by the port 0 mode control register (PMC0). (a) Port mode P00 to P06 can be set to input or output in 1-bit units by the port 0 mode register (PM0). (b) Control mode (alternate function) P00 to P06 can be set to the port mode or control mode in 1-bit units by the port 0 mode control register (PMC0). (i) NMI (non-maskable interrupt request) ... Input This is a non-maskable interrupt request input pin. (ii) INTP0 to INTP3 (interrupt request from peripherals) ... Input These are external interrupt request input pins. (iii) TOH0, TOH1 (timer output) ... Output These are timer H pulse signal output pins. (2) P30 to P35, P38, P39 (Port 3) ... I/O Port 3 is an 8-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, P30 to P35, P38, and P39 can also be used for serial interface (UART0, I 2C0) I/O and 16-bit timer input in control mode 1, and for 16-bit timer output in control mode 2. The port mode and control mode can be selected as the operation mode for each bit, and are specified by the port 3 mode control register (PMC3). P33 and P35 can be set to control mode 1 and control mode 2 in 1-bit units by the port 3 function control register (PFC3). When used as outputs, P38 and P39 are fixed to N-ch open-drain output. (a) Port mode P30 to P35, P38, and P39 can be set to input or output in 1-bit units by the port 3 mode register (PM3). (b) Control mode P30 to P35, P38, and 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 and 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. |
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