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TMP86FS28DFG データシート(PDF) 232 Page - Toshiba Semiconductor |
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TMP86FS28DFG データシート(HTML) 232 Page - Toshiba Semiconductor |
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232 / 272 page  Page 220 18. Serial PROM Mode 18.3 Serial PROM Mode Setting TMP86FS28DFG 18.3 Serial PROM Mode Setting 18.3.1 Serial PROM Mode Control Pins To execute on-board programming, activate the serial PROM mode. Table 18-2 shows pin setting to activate the serial PROM mode. Note: The BOOT pin is shared with the UART communication pin (RXD1 pin) in the serial PROM mode. This pin is used as UART communication pin after activating serial PROM mode 18.3.2 Pin Function In the serial PROM mode, TXD1 (P35) and RXD1 (P34) are used as a serial interface pin. Note 1: During on-board programming with other parts mounted on a user board, be careful no to affect these communication control pins. Note 2: Operating range of high frequency in serial PROM mode is 2 MHz to 16 MHz. Table 18-2 Serial PROM Mode Setting Pin Setting TEST pin High BOOT/RXD1 pin High RESET pin Table 18-3 Pin Function in the Serial PROM Mode Pin Name (Serial PROM Mode) Input/ Output Function Pin Name (MCU Mode) TXD1 Output Serial data output (Note 1) P35 BOOT/RXD1 Input/Input Serial PROM mode control/Serial data input P34 RESET Input Serial PROM mode control RESET TEST Input Fixed to high TEST VDD, AVDD Power supply 4.5 to 5.5 V VSS, AVSS Power supply 0 V VAREF Power supply Leave open or apply input reference voltage. I/O ports except P35, P34 I/O These ports are in the high-impedance state in the serial PROM mode. The input level is fixed to the port inputs with a hardware feature to prevent overlap current. (The port inputs are invalid.) COM3 to COM0 Output Low output in the serial PROM mode C0,C1,V3 to V1 - Connect to a capacitor (resistance), or leave open. XIN Input Self-oscillate with an oscillator. (Note 2) XOUT Output |
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