전자부품 데이터시트 검색엔진 |
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CS3310 데이터시트(PDF) 7 Page - Cirrus Logic |
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CS3310 데이터시트(HTML) 7 Page - Cirrus Logic |
7 / 17 page CS3310 DS82F1 7 In single device operation, volume control data is loaded into the 16-bit shift register by holding the CS pin low for sixteen SCLK pulses and then latched on the rising edge of CS. The previous contents of the shift-register are shifted through the register and out SDATAO during the process. Multi-channel operation can be implemented as shown in Figure 4 by connecting the SDATAO of device #1 to the SDATAI pin of device #2. In this manner multiple CS3310s can be loaded from a single serial data line without complex addressing schemes. Volume control data is loaded by holding CS low for 16 x N SCLK pulses, where N is the number of devices in the chain. The 16 bits clocked into device #1 on SCLK pulses 1-16 are clocked into device #2 on SCLK pulses 17- 32. The CS3310s are simultaneously updated on the rising edge of CS following 16 x N SCLK pulses Notice that a 47 kohm resistor is required to terminate SDATAI, as shown in Figure 4, due to the high impedance state of SDATAO when CS is high.. R7 R6 R5 R4 R3 R2 R1 R0 L7 L6 L5 L4 L3 L2 L1 L0 R7 R6 R5 R4 R3 R2 R1 R0 L7 L6 L5 L4 L3 L2 L1 L0 CS SCLK SDATAI SDATAO L0 = Left Channel Least Significant Bit R0 = Right Channel Least Significant Bit L7 = Left Channel Most Significant Bit R7 = Right Channel Most Significant Bit SDATAI is latched internally on the rising edge of SCLK SDATAO transitions after the falling edge of SCLK SDATAO bits reflect the data previously loaded into the CS3310 Figure 3. Serial Port Timing AUDIO SIGNAL 16 9 AINL AINR SDATAI SDATAO AOUTL AOUTR CS SCLK CS3310 CONTROLLER 14 11 2 6 3 7 AUDIO SIGNAL 16 9 AINL AINR SDATAI SDATAO AOUTL AOUTR CS SCLK CS3310 14 11 2 6 3 7 47 k #1 #2 Figure 4. Daisy Chaining Diagram |
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