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C509-L Datasheet(PDF) 50 Page - Siemens Semiconductor Group |
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C509-L Datasheet(HTML) 50 Page - Siemens Semiconductor Group |
50 / 74 page Semiconductor Group 49 09.96 C509-L Serial Interfaces 0 and 1 The C509-L has two serial interfaces which are functionally nearly identical concerning the asynchronous modes of operation. The two channels are full-duplex, meaning they can transmit and receive simultaneously. The serial channel 0 is completely compatible with the serial channel of the C501 (one synchronous mode, three asynchronous modes). Serial channel 1 has the same functionality in its asynchronous modes, but the synchronous mode and the fixed baud rate UART mode is missing. The operating modes of the serial interfaces is illustrated in table 11. The possible baudrates can be calculated using the formulas given in table 12. Table 11 Operating Modes of Serial Interface 0 and 1 Serial Interface Mode S0CON S1CON Description SM0 SM1 SM 0 0 0 0 – Shift register mode Serial data enters and exits through R ×D0; T ×D0 outputs the shift clock; 8-bit are transmitted/received (LSB first); fixed baud rate 1 0 1 – 8-bit UART, variable baud rate 10 bits are transmitted (through T ×D0) or received (at R ×D0) 2 1 0 – 9-bit UART, fixed baud rate 11 bits are transmitted (through T ×D0) or received (at R ×D0) 3 1 1 – 9-bit UART, variable baud rate Like mode 2 1 A – – 0 9-bit UART; variable baud rate 11 bits are transmitted (through T ×D1) or received (at R ×D1) B – – 1 8-bit UART; variable baud rate 10 bits are transmitted (through T ×D1) or received (at R ×D1) |
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