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H8S/2240 数据表(PDF) 486 Page - Renesas Technology Corp |
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H8S/2240 数据表(HTML) 486 Page - Renesas Technology Corp |
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486 / 818 page  Section 12 Serial Communication Interface (SCI) Rev.3.00 Mar. 26, 2007 Page 444 of 772 REJ09B0355-0300 Table 12.11 Receive Errors and Conditions for Occurrence Receive Error Abbreviation Occurrence Condition Data Transfer Overrun error ORER When the next data reception is completed while the RDRF flag in SSR is set to 1 Receive data is not transferred from RSR to RDR. Framing error FER When the stop bit is 0 Receive data is transferred from RSR to RDR. Parity error PER When the received data differs from the parity (even or odd) set in SMR Receive data is transferred from RSR to RDR. Figure 12.8 shows an example of the operation for reception in asynchronous mode. RDRF FER 0 1 frame D0 D1 D7 0/1 1 0 D0 D1 D7 0/1 0 1 1 Data Start bit Parity bit Stop bit Start bit Data Parity bit Stop bit RXI interrupt request generated ERI interrupt request generated by framing error Idle state (mark state) RDR data read and RDRF flag cleared to 0 in RXI interrupt service routine Figure 12.8 Example of SCI Operation in Reception (Example with 8-Bit Data, Parity, One Stop Bit) |
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