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AD5259 Datasheet(PDF) 7 Page - Analog Devices |
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AD5259 Datasheet(HTML) 7 Page - Analog Devices |
7 / 14 page AD5259 Preliminary Technical Data Rev. PrJ 7/22/04 | Page 7 of 14 Read Modes Table 11. Traditional Read back of RDAC Register value S Device Address* (7-bit) 0 SA 0 0 0 0 0 0 0 0 SA S Device Address* (7-bit) 1 SA D7 D6 D5 D4 D3 D2 D1 D0 NA P Slave Address Byte Instruction Byte Slave Address Byte Read Back Data ↑ Repeat start Table 12. Traditional Read back of stored EEPROM value S Device Address* (7-bit) 0 SA 0 0 1 0 0 0 0 0 SA S Device Address* (7-bit) 1 SA D7 D6 D5 D4 D3 D2 D1 D0 NA P Slave Address Byte Instruction Byte Slave Address Byte Read Back Data ↑ Repeat start Table 13. Traditional Read back of Tolerance i. Consecutively S Device Address* (7-bit) 0 SA 0 0 1 1 1 1 1 0 SA S Device Address* (7-bit) 1 SA D7 D6 D5 D4 D3 D2 D1 D 0 MA D7 D6 D5 D4 D3 D2 D1 D0 NA P Slave Address Byte Instruction Byte Slave Address Byte Sign + Integer Byte Decimal Byte ↑ Repeat start ii. Individually S Device Address* (7-bit) 0 SA 0 0 1 1 1 1 1 0 SA S Device Address* (7-bit) 1 SA D7 D6 D5 D4 D3 D2 D1 D 0 NA P Slave Address Byte Instruction Byte Slave Address Byte Sign + Integer Byte ↑ Repeat start S Device Address* (7-bit) 0 SA 0 0 1 1 1 1 1 1 SA S Device Address* (7-bit) 1 SA D7 D6 D5 D4 D3 D2 D1 D 0 NA P Slave Address Byte Instruction Byte Slave Address Byte Decimal Byte ↑ Repeat start Note: Read modes above are referred to as traditional because the first two bytes for all three cases are “dummy” bytes which function to place the pointer towards the correct register. This is the reason for the Repeat Start. In theory, this step can be avoided if the user is interested in reading a register that was previously written to. For example, if the EEPROM was just written to, then the user can skip the |
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