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AD9920ABBCZ Datasheet(PDF) 105 Page - Analog Devices |
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AD9920ABBCZ Datasheet(HTML) 105 Page - Analog Devices |
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105 / 112 page ![]() AD9920A Rev. B | Page 105 of 112 Address Data Bits Default Value Update Type Name Description 0xBA [27:0] 0 UNUSED Do not access, or write to 0x00. 0xBB [27:0] 0 UNUSED Do not access, or write to 0x00. 0xBC [27:0] 0 UNUSED Do not access, or write to 0x00. 0xBD [27:0] 0 UNUSED Do not access, or write to 0x00. 0xBE [27:0] 0 UNUSED Do not access, or write to 0x00. 0xBF [27:0] 0 UNUSED Do not access, or write to 0x00. Table 61. Extra Registers Address Data Bits Default Value Update Name Description 0xC0 [27:0] 0 VD Test Do not access, or write to 0x00. 0xC1 [27:0] 0 VD Test Do not access, or write to 0x00. 0xC2 [27:0] 0 VD Test Do not access, or write to 0x00. 0xC3 [7:0] 0 SCK GPO_MASK_HIGH 1 = masks GPO[x] to high. Takes priority over normal operation. [15:8] 0 GPO_MASK_LOW 1 = masks GPO[x] to low. Takes priority over normal operation and GPO_MASK_HIGH. 0xC4 [27:0] 0 VD Test Test register. Do not access, or set to 0. 0xC5 [27:0] 0x1516 SCK Test Test register. Do not access, or set to 0x1516. 0xC6 [27:0] 0 UNUSED Unused register. Do not access, or set to 0. 0xC7 [27:0] 0 UNUSED Unused register. Do not access, or set to 0. 0xC8 [27:0] 0 SCK Test Test register. Do not access, or set to 0. 0xC9 [27:0] 0xFFFF SCK Test Test register. Do not access, or set to 0xFFFF. 0xCA [27:0] 0 SCK Test Test register. Do not access, or set to 0. 0xCB [27:0] 0 SCK Test Test register. Do not access, or set to 0. 0xCC [27:0] 0 UNUSED Unused register. Do not access, or set to 0. 0xCD [27:0] 0 UNUSED Unused register. Do not access, or set to 0. 0xCE [27:0] 0 UNUSED Unused register. Do not access, or set to 0. 0xCF [27:0] 0 UNUSED Unused register. Do not access, or set to 0. 0xD0 [27:0] 0 SCK Test Test register. Do not access, or set to 0. 0xD1 [19:0] 0 SCK Test Test use only. Set to 0. [20] 0 STARTUP Must be set to 1 to start the device. 0xD2 [27:0] 0 SCK Test Test register. Do not access, or set to 0. 0xD3 [27:0] 0 SCK Test Test register. Do not access, or set to 0. 0xD4 [0] 0 SCK Test Test use only. Set to 0. [1] 0 GPO_INT_EN 1 = allow observation of internal signals at GPO1 to GPO3 outputs (must also set SEL_GPx bits low). Note that GPO4 to GPO8 continue to output normal GP toggles. GPO1: internal clock. GPO2: CLPOB. GPO3: delayed sample clock. [9:2] 0 Test Test use only. Set to 0. 0xD5 [27:0] 0 SCK Test Test use only. Set to 0. 0xD6 [27:0] 0xA10 SCK Test Test use only. Set to 0xA10. 0xD7 [27:0] 0 SCK Test Test use only. Set to 0. 0xD8 [27:0] 0x888 SCK DOUT_STRENGTH Controls drive strength of data output drivers. 0x888 = normal drive strength. 0x848 = weak drive strength. 0x808 = weaker drive strength. 0xD9 [27:0] 0 SCK Test Test use only. Set to 0. 0xDA [27:0] 0 SCK Test Test use only. Set to 0. 0xDB [27:0] SCK Test Test use only. Set to 0. 0xDC [27:0] 0xF7F SCK Test Test use only. Set to 0xF7F. 0xDD [27:0] 0x14 SCK Test Test use only. Set to 0x14. |
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