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AD9920ABBCZ Datasheet(PDF) 87 Page - Analog Devices |
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AD9920ABBCZ Datasheet(HTML) 87 Page - Analog Devices |
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87 / 112 page ![]() AD9920A Rev. B | Page 87 of 112 Table 50. Standby Mode Operation for HCLKMODE = 0x10 (Standby Polarities for XV, XSUBCK, and GPO Outputs Are Programmable) I/O Block Standby3 (Default)1, 2 OUT_CONTROL = Low2 Standby23, 4 Standby13, 4 AFE Off No change Off Only REFT, REFB on Timing Core Off No change Off On CLO Oscillator Off No change Off On CLO Low No change Low Running H1 High-Z Low Low (4.3 mA) Low (4.3 mA) H2 High-Z Low Low (4.3 mA) Low (4.3 mA) H3 High-Z Low Low (4.3 mA) Low (4.3 mA) H4 High-Z Low Low (4.3 mA) Low (4.3 mA) H5 High-Z Low Low (4.3 mA) Low (4.3 mA) H6 High-Z Low Low (4.3 mA) Low (4.3 mA) H7 High-Z Low Low (4.3 mA) Low (4.3 mA) H8 High-Z Low Low (4.3 mA) Low (4.3 mA) HL High-Z Low Low (4.3 mA) Low (4.3 mA) RG High-Z Low Low (4.3 mA) Low (4.3 mA) VD Low VDHDPOL value VDHDPOL value Running HD Low VDHDPOL value VDHDPOL value Running DCLK Low Running Low Running D0 to D11 Low Low Low Low XV1 to XV24 Low Low Low Low XSUBCK Low Low Low Low GPO1 to GPO4, GPO7, and GPO8 Low Low Low Low 1 To exit Standby3 or Standby2 mode, write 00 to the standby register (Address 0x00, Bits[1:0]) and then reset the timing core after 500 μs to guarantee proper settling of the oscillator and external crystal. 2 Standby3 mode takes priority over OUT_CONTROL for determining the output polarities. 3 These polarities assume OUT_CONTROL = high because OUT_CONTROL = low takes priority over Standby1 and Standby2. 4 Standby1 and Standby2 set H and RG drive strength to minimum value (4.3 mA). |
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