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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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PIC16F72/SS 데이터시트(PDF) 52 Page - Microchip Technology |
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PIC16F72/SS 데이터시트(HTML) 52 Page - Microchip Technology |
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52 / 136 page  PIC16F72 DS39597B-page 50 2002 Microchip Technology Inc. FIGURE 9-6: I2C WAVEFORMS FOR RECEPTION (7-BIT ADDRESS) FIGURE 9-7: I2C WAVEFORMS FOR TRANSMISSION (7-BIT ADDRESS) P 9 8 7 6 5 D0 D1 D2 D3 D4 D5 D6 D7 S A7 A6 A5 A4 A3 A2 A1 SDA SCL 12 3 4 5 6 7 8 9 12 3 4 56 7 89 12 3 4 Bus Master terminates transfer Bit SSPOV is set because the SSPBUF register is still full. Cleared in software SSPBUF register is read ACK Receiving Data Receiving Data D0 D1 D2 D3 D4 D5 D6 D7 ACK R/W = 0 Receiving Address SSPIF (PIR1<3>) BF (SSPSTAT<0>) SSPOV (SSPCON<6>) ACK ACK is not sent. SDA SCL SSPIF (PIR1<3>) BF (SSPSTAT<0>) CKP (SSPCON<4>) A7 A6 A5 A4 A3 A2 A1 ACK D7 D6 D5 D4 D3 D2 D1 D0 ACK Transmitting Data R/W = 1 Receiving Address 1 2 3 4 56 789 123 4 5 67 8 9 P Cleared in software SSPBUF is written in software From SSP Interrupt Service Routine Set bit after writing to SSPBUF S Data is sampled SCL held low while CPU responds to SSPIF (the SSPBUF must be written to before the CKP bit can be set) |
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