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SH7052 Datasheet(PDF) 493 Page - Renesas Technology Corp |
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SH7052 Datasheet(HTML) 493 Page - Renesas Technology Corp |
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493 / 919 page ![]() 467 Transmit/Receive Formats: Table 14.10 shows the 12 communication formats that can be selected in asynchronous mode. The format is selected by settings in the serial mode register (SMR). Table 14.10 Serial Communication Formats (Asynchronous Mode) SMR Bits Serial Transmit/Receive Format and Frame Length CHR PE MP STOP 1 2345678 9 10 11 12 0 0 0 0 START 8-bit data STOP 0 0 0 1 START 8-bit data STOP STOP 0 1 0 0 START 8-bit data P STOP 0 1 0 1 START 8-bit data P STOP STOP 1 0 0 0 START 7-bit data STOP 1 0 0 1 START 7-bit data STOP STOP 1 1 0 0 START 7-bit data P STOP 1 1 0 1 START 7-bit data P STOP STOP 0 — 1 0 START 8-bit data MPB STOP 0 — 1 1 START 8-bit data MPB STOP STOP 1 — 1 0 START 7-bit data MPB STOP 1 — 1 1 START 7-bit data MPB STOP STOP —: Don’t care bits. START: Start bit STOP: Stop bit P: Parity bit MPB: Multiprocessor bit Clock: An internal clock generated by the on-chip baud rate generator or an external clock input from the SCK pin can be selected as the SCI transmit/receive clock. The clock source is selected by the C/ A bit in the serial mode register (SMR) and bits CKE1 and CKE0 in the serial control register (SCR) (table 14.9). When an external clock is input at the SCK pin, it must have a frequency equal to 16 times the desired bit rate. |
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