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MAX96708 Scheda tecnica(PDF) 62 Page - Maxim Integrated Products |
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MAX96708 Scheda tecnica(HTML) 62 Page - Maxim Integrated Products |
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62 / 68 page ![]() UART-to-I2C Conversion When using the UART control channel, the remote-side device can communicate to I2C peripherals through UART-to-I2C conversion. Set the INTTYPE bits in the remote side device to "00" to activate UART-to-I2C conversion. The converted I2C bit rate is the same as the incoming UART bit rate. I2C peripherals must not use clock stretching in order to be compatible with UART- to-I2C conversion. There are two possible methods the devices use to convert UART to I2C. In the first method, I2CMETHOD = 0. The register address is sent with the I2C communica- tion (Figure 23). For devices that do not use a register address (such as the MAX7324) set I2CMETHOD = 1 and send a dummy byte in place of the register address (Figure 24). In this method, the remote device omits send- ing the register address. Figure 23. Format Conversion Between GMSL UART and I2C with Register Address (I2CMETHOD = 0) Figure 24. Format Conversion Between GMSL UART and I2C with Register Address (I2CMETHOD = 1) 11 SYNC FRAME REGISTER ADDRESS NUMBER OF BYTES DEVICE ID + WR DATA 0 DEV ID A 11 11 11 11 DATA N 11 11 S 1 1 1 ACK FRAME 7 : MASTER TO SLAVE 8 SERIALIZER/DESERIALIZER PERIPHERAL W 1 REG ADDR 8 A 1 1 8 1 11 SYNC FRAME REGISTER ADDRESS NUMBER OF BYTES DEVICE ID + RD 11 11 11 11 ACK FRAME DATA 0 11 DATA N 11 UART-TO-I2C CONVERSION OF WRITE PACKET (I2CMETHOD = 0) UART-TO-I2C CONVERSION OF READ PACKET (I2CMETHOD = 0) S: START P: STOP A: ACKNOWLEDGE : SLAVE TO MASTER DATA 0 A DATA N A P DEV ID A S 1 1 7 W 1 DEV ID A S 1 1 7 R 1 DATA N P 1 8 A 1 DATA 0 8 A 1 REG ADDR 8 A 1 µC SERIALIZER/DESERIALIZER µC SERIALIZER/DESERIALIZER SERIALIZER/DESERIALIZER PERIPHERAL MASTER TO SLAVE SERIALIZER/DESERIALIZER SERIALIZER/DESERIALIZER SERIALIZER/DESERIALIZER UART-TO-I2C CONVERSION OF READ PACKET (I2CMETHOD = 1) UART-TO-I2C CONVERSION OF WRITE PACKET (I2CMETHOD = 1) µC SERIALIZER/DESERIALIZER µC SYNC FRAME 11 11 11 11 11 11 11 11 11 11 11 11 11 11 DEVICE ID + RD REGISTER ADDRESS NUMBER OF BYTES SYNC FRAME DEVICE ID + WR REGISTER ADDRESS NUMBER OF BYTES DATA 0 DATA N ACK FRAME ACK FRAME DATA 0 DATA N DATA N A DATA 0 W A DEV ID S A P PERIPHERAL PERIPHERAL S 1 1 1 8 8 8 1 1 1 1 7 1 1 8 1 1 1 7 DEV ID R A A A P DATA 0 DATA N SLAVE TO MASTER S: START P: STOP A: ACKNOWLEDGE www.maximintegrated.com Maxim Integrated │ 62 MAX96708 14-Bit GMSL Deserializer with Coax or STP Cable Input |
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