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CY28401 Datasheet(PDF) 3 Page - SpectraLinear Inc |
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CY28401 Datasheet(HTML) 3 Page - SpectraLinear Inc |
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3 / 13 page  CY28401 Rev 1.0, November 21, 2006 Page 3 of 13 10 Acknowledge from slave 10 Acknowledge from slave 11:18 Command Code – 8 bits '00000000' stands for block operation 11:18 Command Code – 8 bits '00000000' stands for block operation 19 Acknowledge from slave 19 Acknowledge from slave 20:27 Byte Count from master – 8 bits 20 Repeat start 28 Acknowledge from slave 21:27 Slave address – 7 bits 29:36 Data byte 0 from master – 8 bits 28 Read = 1 37 Acknowledge from slave 29 Acknowledge from slave 38:45 Data byte 1 from master – 8 bits 30:37 Byte count from slave – 8 bits 46 Acknowledge from slave 38 Acknowledge from host .... Data bytes from master/Acknowledge 39:46 Data byte 0 from slave – 8 bits .... Data Byte N – 8 bits 47 Acknowledge from host .... Acknowledge from slave 48:55 Data byte 1 from slave – 8 bits .... Stop 56 Acknowledge from host .... Data bytes from slave/Acknowledge .... Data byte N from slave – 8 bits .... Acknowledge from host .... Stop Table 3. 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[6:0] 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[6:0] 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 Table 2. Block Read and Block Write Protocol (continued) Block Write Protocol Block Read Protocol Bit Description Bit Description Byte 0: Control Register 0 Bit @pup Name Description 7 0 PWRDWN# drive mode 0 = Driven when stopped, 1 = Three-state 6 0 SRC_STOP# drive mode 0 = Driven when stopped, 1 = Three-state |
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