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CY28439OXC-2T Datasheet(PDF) 4 Page - SpectraLinear Inc |
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CY28439OXC-2T Datasheet(HTML) 4 Page - SpectraLinear Inc |
4 / 21 page CY28439-2 Rev 1.0, November 21, 2006 Page 4 of 21 Table 1. Command Code Definition Bit Description 7 0 = Block read or block write operation, 1 = Byte read or byte write operation (6:0) Byte offset for byte read or byte write operation. For block read or block write operations, these bits should be '0000000' Table 2. Block Read and Block Write Protocol Block Write Protocol Block Read Protocol Bit Description Bit Description 1Start 1 Start 8:2 Slave address – 7 bits 8:2 Slave address – 7 bits 9 Write 9 Write 10 Acknowledge from slave 10 Acknowledge from slave 18:11 Command Code – 8 bits 18:11 Command Code – 8 bits 19 Acknowledge from slave 19 Acknowledge from slave 27:20 Byte Count – 8 bits (Skip this step if I2C_EN bit set) 20 Repeat start 28 Acknowledge from slave 27:21 Slave address – 7 bits 36:29 Data byte 1 – 8 bits 28 Read = 1 37 Acknowledge from slave 29 Acknowledge from slave 45:38 Data byte 2 – 8 bits 37:30 Byte Count from slave – 8 bits 46 Acknowledge from slave 38 Acknowledge .... Data Byte /Slave Acknowledges 46:39 Data byte 1 from slave – 8 bits .... Data Byte N – 8 bits 47 Acknowledge .... Acknowledge from slave 55:48 Data byte 2 from slave – 8 bits .... Stop 56 Acknowledge .... Data bytes from slave / Acknowledge .... Data Byte N from slave – 8 bits .... NOT Acknowledge .... Stop Table 3. Byte Read and Byte Write Protocol Byte Write Protocol Byte Read Protocol Bit Description Bit Description 1Start 1Start 8:2 Slave address – 7 bits 8:2 Slave address – 7 bits 9Write 9Write 10 Acknowledge from slave 10 Acknowledge from slave 18:11 Command Code – 8 bits 18:11 Command Code – 8 bits 19 Acknowledge from slave 19 Acknowledge from slave 27:20 Data byte – 8 bits 20 Repeated start 28 Acknowledge from slave 27:21 Slave address – 7 bits 29 Stop 28 Read 29 Acknowledge from slave 37:30 Data from slave – 8 bits 38 NOT Acknowledge 39 Stop |
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