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LM4450B bảng dữ liệu(PDF) 4 Page - Texas Instruments |
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LM4450B bảng dữ liệu(HTML) 4 Page - Texas Instruments |
4 / 45 page DVDD1 XTL_OUT SDATA_OUT 48 1 47 46 2 3 4 5 XTL_IN DVSS1 45 6 7 8 9 10 11 12 LM4550B $&µ97 Rev 2.1 Codec 36 35 34 33 32 31 30 29 28 27 26 25 BIT_CLK SDATA_IN SYNC RESET# PC_BEEP DVDD2 DVSS2 LINE_OUT_R 3DP NC LINE_OUT_L 3DN NC NC AVSS1 NC VREF VREF_OUT AVDD1 44 43 42 41 40 39 38 37 13 14 15 16 17 18 19 20 21 22 23 24 LM4550B SNAS276G – MAY 2005 – REVISED SEPTEMBER 2015 www.ti.com 6 Pin Configuration and Functions PR Package 48-Pin LQFP Top View Pin Functions PIN I/O DESCRIPTION NAME NO. Mono Input This line level (1 Vrms nominal) mono input is mixed equally into both channels of the Stereo Mix signal at MIX2 under the control of the PC_Beep Volume control register, 0Ah. The PC_BEEP level can be muted or adjusted from 0 dB to –45 dB in 3-dB steps. The Stereo Mix signal feeds both the PC_BEEP 12 I Line Out and Headphone Out analog outputs and is also selectable at the Record Select Mux. During Initialization or Cold Reset, (reset pin held active low), PC_BEEP is switched directly to both channels of the Line Out stereo output, bypassing all volume controls. This allows signals such as PC power-on self-test tones to be heard through the PC's audio system before the codec registers are configured. Mono Input This line level (1 Vrms nominal) mono input is selectable at the Record Select Mux for conversion by either or both channels of the stereo ADC. It can also be mixed equally into both channels of the PHONE 13 I Stereo Mix signal at MIX2 under the control of the Phone Volume register, 0Ch. The PHONE level can be muted or adjusted from 12 dB to –34.5 dB in 1.5-dB steps. The Stereo Mix signal feeds both the Line Out and Headphone Out analog stereo outputs and is also selectable at the Record Select Mux. Left Stereo Channel Input This line level input (1 Vrms nominal) is selectable at the left channel of the stereo Record Select Mux for conversion by the left channel ADC. It can also be mixed into the left channel of the Stereo Mix 3D AUX_L 14 I signal at MIX1 under the control of the Aux Volume register, 16h. The AUX_L level can be muted (along with AUX_R) or adjusted from 12 dB to –34.5 dB in 1.5-dB steps. Stereo Mix 3D is combined into the Stereo Mix signal at MIX2 for access to the stereo outputs Line Out and Headphone Out. Right Stereo Channel Input This line level input (1 Vrms nominal) is selectable at the right channel of the stereo Record Select Mux for conversion by the right channel ADC. It can also be mixed into the right channel of the Stereo AUX_R 15 I Mix 3D signal at MIX1 under the control of the Aux Volume register, 16h. The AUX_R level can be muted (along with AUX_L) or adjusted from 12 dB to –34.5 dB in 1.5-dB steps. Stereo Mix 3D is combined into the Stereo Mix signal at MIX2 for access to the stereo outputs Line Out and Headphone Out. Left Stereo Channel Input This line level input (1 Vrms nominal) is selectable at the left channel of the stereo Record Select Mux for conversion by the left channel ADC. It can also be mixed into the left channel of the Stereo Mix 3D VIDEO_L 16 I signal at MIX1 under the control of the Video Volume register, 14h. The VIDEO_L level can be muted (along with VIDEO_R) or adjusted from 12 dB to –34.5 dB in 1.5-dB steps. Stereo Mix 3D is combined into the Stereo Mix signal at MIX2 for access to the stereo outputs Line Out and Headphone Out. 4 Submit Documentation Feedback Copyright © 2005–2015, Texas Instruments Incorporated Product Folder Links: LM4550B |
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