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M16C/1N bảng dữ liệu(PDF) 228 Page - Renesas Technology Corp |
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M16C/1N bảng dữ liệu(HTML) 228 Page - Renesas Technology Corp |
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228 / 238 page  Rev.1.00 Oct 20, 2004 page 216 of 222 M16C/1N Group REJ090007-0100Z 20. Precautionary Notes in Using the Device Figure 20.5 CAN Transceiver Connection In case of PCA82C250 (Philips product) Standby mode high-speed mode "H" "L" impossible possible Rs pin (Note 1) CAN communication connection M16C/1N PCA82C250 Switch OFF CTX P02 Port (Note 2) CANH TXD RS CRX P03 CANL RXD M16C/1N PCA82C250 Switch ON CTX P02 Port (Note 2) CANH TXD RS CRX P03 CANL RXD In case of PCA82C252 (Philips product) sleep mode normal operation mode "L" "L" "H" "H" impossible possible STB pin (Note 1) EN pin (Note 1) CAN communication connection MCU PCA82C252 Switch OFF CTX P02 Port (Note 2) CANH TXD STB CRX P03 CANL RXD MCU PCA82C252 Switch ON CTX P02 Port (Note 2) CANH TXD Port (Note 2) Port (Note 2) EN CRX P03 CANL RXD STB EN Note 1: The pin which controls the operation mode of CAN transceiver. Note 2: Connect to enabled port to control CAN transceiver. 20.6.2 CAN Transceiver in Boot Mode When programming the flash memory in boot mode via CAN bus, the operation mode of CAN transceiver should be set to "high-speed mode" or "normal operation mode". If the operation mode is controlled by the microcomputer, CAN transceiver must be set the operation mode to "high- speed mode" or "normal operation mode" before programming the flash memory by changing the switch etc. Figure 20.5 shows pin connections of CAN transceiver. |
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