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HC05V7GRS/D Scheda tecnica(PDF) 106 Page - NXP Semiconductors |
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HC05V7GRS/D Scheda tecnica(HTML) 106 Page - NXP Semiconductors |
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106 / 170 page ![]() SECTION 15: MESSAGE DATA LINK CONTROLLER Page 92 MC68HC05V7 Specification Rev. 1.0 15.1 OUTLINE The CPU Interface contains the software addressable registers and provides the link between the CPU and the Tx and Rx Buffers. The Tx and Rx Buffers provide storage for data received and data to be transmitted onto the J1850 bus. The Protocol Handler is responsible for the encoding and decoding of data bits and special message symbols during transmission and reception. The MUX Interface provides the link between the MDLC digital section and the analog Physical Interface. The wave shaping, driving, and digitizing of data is performed by the Physical Interface. NOTE: The bus data rate depends upon the microcontroller oscillator frequency (f OSC) and the MDLC rate selection control bits (R0, R1). The correct combination for the application must be chosen in order for J1850 bus communications to take place. See 15.2.2.3 R1, R0 - Rate Select. Physical Interface To CPU Protocol Handler MUX Interface CPU Interface Rx/Tx Buffers To J1850 Bus MDLC Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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