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AD9252 データシート(PDF) 32 Page - Analog Devices |
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AD9252 データシート(HTML) 32 Page - Analog Devices |
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32 / 53 page ![]() Data Sheet AD9252 Rev. E | Page 31 of 52 Addr. (Hex) Parameter Name (MSB) Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 (LSB) Bit 0 Default Value (Hex) Notes/ Comments 14 output_mode X 0 = LVDS ANSI-644 (default) 1 = LVDS low power, (IEEE1596.3 similar) X X X Output invert 1 = on 0 = off (default) 00 = offset binary (default) 01 = twos complement 0x00 Configures the outputs and the format of the data. 15 output_adjust X X Output driver termination 00 = none (default) 01 = 200 Ω 10 = 100 Ω 11 = 100 Ω X X X DCO and FCO 2× drive strength 1 = on 0 = off (default) 0x00 Determines LVDS or other output properties. Primarily func- tions to set the LVDS span and common-mode levels in place of an external resistor. 16 output_phase X X X X 0011 = output clock phase adjust (0000 through 1010) 0000 = 0° relative to data edge 0001 = 60° relative to data edge 0010 = 120° relative to data edge 0011 = 180° relative to data edge (default) 0101 = 300° relative to data edge 0110 = 360° relative to data edge 1000 = 480° relative to data edge 1001 = 540° relative to data edge 1010 = 600° relative to data edge 1011 to 1111 = 660° relative to data edge 0x03 On devices that utilize global clock divide, this register determines which phase of the divider output is used to supply the output clock. Internal latching is unaffected. 19 user_patt1_lsb B7 B6 B5 B4 B3 B2 B1 B0 0x00 User-defined pattern, 1 LSB. 1A user_patt1_msb B15 B14 B13 B12 B11 B10 B9 B8 0x00 User-defined pattern, 1 MSB. 1B user_patt2_lsb B7 B6 B5 B4 B3 B2 B1 B0 0x00 User-defined pattern, 2 LSB. 1C user_patt2_msb B15 B14 B13 B12 B11 B10 B9 B8 0x00 User-defined pattern, 2 MSB. 21 serial_control LSB first 1 = on 0 = off (default) X X X <10 MSPS, low encode rate mode 1 = on 0 = off (default) 000 = 14 bits (default, normal bit stream) 001 = 8 bits 010 = 10 bits 011 = 12 bits 100 = 14 bits 0x00 Serial stream control. Default causes MSB first and the native bit stream (global). 22 serial_ch_stat X X X X X X Channel output reset 1 = on 0 = off (default) Channel power- down 1 = on 0 = off (default) 0x00 Used to power down individual sections of a converter (local). 1 X = an undefined feature. |
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