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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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PIC1F628 데이터시트(PDF) 87 Page - Microchip Technology |
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PIC1F628 데이터시트(HTML) 87 Page - Microchip Technology |
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87 / 170 page  2003 Microchip Technology Inc. Preliminary DS40300C-page 85 PIC16F62X 12.5.2 USART SYNCHRONOUS SLAVE RECEPTION The operation of the Synchronous Master and Slave modes is identical except in the case of the SLEEP mode. Also, bit SREN is a don't care in Slave mode. If receive is enabled, by setting bit CREN, prior to the SLEEP instruction, then a word may be received during SLEEP. On completely receiving the word, the RSR register will transfer the data to the RCREG register and if enable bit RCIE bit is set, the interrupt generated will wake the chip from SLEEP. If the global interrupt is enabled, the program will branch to the interrupt vector (0004h). Steps to follow when setting up a Synchronous Slave Reception: 1. Enable the synchronous master serial port by setting bits SYNC and SPEN and clearing bit CSRC. 2. If interrupts are desired, then set enable bit RCIE. 3. If 9-bit reception is desired, then set bit RX9. 4. To enable reception, set enable bit CREN. 5. Flag bit RCIF will be set when reception is complete and an interrupt will be generated, if enable bit RCIE was set. 6. Read the RCSTA register to get the ninth bit (if enabled) and determine if any error occurred during reception. 7. Read the 8-bit received data by reading the RCREG register. 8. If any error occurred, clear the error by clearing bit CREN. TABLE 12-11: REGISTERS ASSOCIATED WITH SYNCHRONOUS SLAVE TRANSMISSION TABLE 12-12: REGISTERS ASSOCIATED WITH SYNCHRONOUS SLAVE RECEPTION Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Value on POR Value on all other RESETS 0Ch PIR1 EEIF CMIF RCIF TXIF — CCP1IF TMR2IF TMR1IF 0000 -000 0000 -000 18h RCSTA SPEN RX9 SREN CREN ADEN FERR OERR RX9D 0000 -00x 0000 -00x 19h TXREG USART Transmit Register 0000 0000 0000 0000 8Ch PIE1 EEIE CMIE RCIE TXIE — CCP1IE TMR2IE TMR1IE 0000 -000 0000 -000 98h TXSTA CSRC TX9 TXEN SYNC — BRGH TRMT TX9D 0000 -010 0000 -010 99h SPBRG Baud Rate Generator Register 0000 0000 0000 0000 Legend: x = unknown, - = unimplemented read as '0'. Shaded cells are not used for Synchronous Slave Transmission. Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Value on POR Value on all other RESETS 0Ch PIR1 EEIF CMIF RCIF TXIF — CCP1IF TMR2IF TMR1IF 0000 -000 0000 -000 18h RCSTA SPEN RX9 SREN CREN ADEN FERR OERR RX9D 0000 -00x 0000 -00x 1Ah RCREG USART Receive Register 0000 0000 0000 0000 8Ch PIE1 EEIE CMIE RCIE TXIE — CCP1IE TMR2IE TMR1IE 0000 -000 0000 -000 98h TXSTA CSRC TX9 TXEN SYNC — BRGH TRMT TX9D 0000 -010 0000 -010 99h SPBRG Baud Rate Generator Register 0000 0000 0000 0000 Legend: x = unknown, - = unimplemented read as '0'. Shaded cells are not used for Synchronous Slave Reception. |
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