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CY28409 Datasheet(PDF) 4 Page - SpectraLinear Inc |
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CY28409 Datasheet(HTML) 4 Page - SpectraLinear Inc |
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4 / 16 page  CY28409 Rev 1.0, November 22, 2006 Page 4 of 16 Control Registers 20:27 Byte Count – 8 bits 20 Repeat start 28 Acknowledge from slave 21:27 Slave address – 7 bits 29:36 Data byte 1 – 8 bits 28 Read = 1 37 Acknowledge from slave 29 Acknowledge from slave 38:45 Data byte 2 – 8 bits 30:37 Byte count from slave – 8 bits 46 Acknowledge from slave 38 Acknowledge from master .... ...................... 39:46 Data byte from slave – 8 bits .... Data Byte (N–1) – 8 bits 47 Acknowledge from master .... Acknowledge from slave 48:55 Data byte from slave – 8 bits .... Data Byte N – 8 bits 56 Acknowledge from master .... Acknowledge from slave .... Data byte N from slave – 8 bits .... Stop .... Acknowledge from master .... Stop Table 4. Block Read and Block Write Protocol (continued) Block Write Protocol Block Read Protocol Bit Description Bit Description Table 5. Byte Read and Byte Write protocol Byte Write Protocol Byte Read Protocol Bit Description Bit Description 1 Start 1 Start 2:8 Slave address – 7 bits 2:8 Slave address – 7 bits 9 Write = 0 9 Write = 0 10 Acknowledge from slave 10 Acknowledge from slave 11:18 Command Code – 8 bits '100xxxxx' stands for byte operation, bits[4:0] of the command code represents the offset of the byte to be accessed 11:18 Command Code – 8 bits '100xxxxx' stands for byte operation, bits[4:0] of the command code represents the offset of the byte to be accessed 19 Acknowledge from slave 19 Acknowledge from slave 20:27 Data byte from master – 8 bits 20 Repeat start 28 Acknowledge from slave 21:27 Slave address – 7 bits 29 Stop 28 Read = 1 29 Acknowledge from slave 30:37 Data byte from slave – 8 bits 38 Acknowledge from master 39 Stop Byte 0:Control Register 0 Bit @Pup Name Description 7 0 Reserved Reserved, Set = 0 61 PCIF PCI PCI Drive Strength Override 0 = Force All PCI and PCIF Outputs to Low Drive Strength 1 = Force All PCI and PCIF Outputs to High Drive Strength 5 0 Reserved Reserved, Set = 0 4 0 Reserved Reserved, Set = 0 |
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