wm9709 Wolfson Microelectronics plc, wm9709 Datasheet
wm9709
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wm9709 Summary of contents
Page 1
... The ID pin can be used to select which data slots on the AC-link are to be used as input to the DAC. This allows 3 x WM9709 to be used with a single controller that supports 6 channel sound, to output surround sound audio signals. When supporting surround, centre or LFE channels, the WM9709 behaves as a slave device ...
Page 2
... Serial interface clock output to AC-link controller if ID pin held low (WM9709 is master). Serial interface clock input from AC-link master if ID pin held either high or high impedance (WM9709 is slave). Digital ground supply Serial data output to AC-link controller Serial interface sync pulse from AC-link controller ...
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... Analogue supply voltage Voltage range digital inputs Voltage range analogue inputs Operating temperature range Storage temperature prior to soldering Storage temperature after soldering Package body temperature (soldering, 10 seconds) Package body temperature (soldering, 2 minutes) w WM9709 MIN MAX -0.3V +7V -0.3V +7V DGND -0.3V DVDD +0.3V AGND -0.3V AVDD +0.3V ...
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... WM9709 DC ELECTRICAL CHARACTERISTICS Test Conditions: AVDD = 5V, AGND = 0V, DVDD = 3.3V, DGND = 0V, T PARAMETER Supply Ranges Digital supply range Analogue supply range Digital ground Analogue ground Difference DGND to AGND Supply Currents Analogue supply current Analogue supply current Digital supply current Digital Logic Levels (DVDD = 3.3) ...
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... All the following timing information is guaranteed by design, but not tested in production. COLD RESET RESETB BITCLK Figure 1 Cold Reset Timing PARAMETER RESETB active low pulse width RESETB inactive to BITCLK startup delay WARM RESET Not supported by WM9709 unless otherwise stated. All t t RST_LOW RST2CLK SYMBOL MIN ...
Page 6
... Output Valid Delay from rising edge of BITCLK ATE IN CIRCUIT TEST MODE When the WM9709 is placed in the ATE test mode, its digital AC-link outputs (BITCLK and SDATAIN) are driven to a high impedance state. This allows ATE in circuit testing of the WM9709 CLK_HIGH ...
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... Notes: 1. All WM9709 signals are normally low through the trailing edge of RESETB. Bringing SDATAOUT high for the trailing edge of RESETB causes WM9709’s AC-link outputs to go high impedance, which is suitable for ATE in circuit testing vendor specific internal test mode can be entered by bringing SYNC high for the trailing edge of RESETB ...
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... BITCLK fall time SYNC rise time SYNC fall time SDATAIN rise time SDATAIN fall time SDATAOUT rise time SDATAOUT fall time DIGITAL FILTER RESPONSE The WM9709 digital filter response is guaranteed by design but is not tested in production. PARAMETER Passband Stopband Passband ripple Stopband Attenuation TERMINOLOGY 1. ...
Page 9
... Readback of vendor ID. AC-LINK DIGITAL SERIAL INTERFACE PROTOCOL WM9709 incorporates a 5 pin digital serial interface that links it to the AC-link controller. The AC-link is a bi-directional, fixed rate, serial PCM digital stream. It handles multiple input, and output audio streams, as well as control register accesses employing a time division multiplexed (TDM) scheme. ...
Page 10
... SDATAOUT’s composite stream is MSB justified (MSB first) with all non-valid slot bit positions stuffed with 0s by the AC-link controller example, consider an 8-bit sample stream that is being played out to one of WM9709’s DACs. The first 8-bit positions are presented to the DAC (MSB justified) followed by the next 12-bit- positions, which are stuffed with 0s by the AC-link controller ...
Page 11
... The WM9709 supports a reduced set of these audio input frames, specifically slots 0,1 and 2. The first bit within slot global bit (SDATAIN slot 0, bit 15) which flags whether WM9709 is in the “DAC Ready” state or not. If the “DAC Ready” bit this indicates that WM9709 is not ready for normal operation. When the AC-link “ ...
Page 12
... If slot 2 is tagged “invalid” by WM9709, then the entire slot will be stuffed with 0s. The WM9709 will use this port only to return the data value of the vendor ID. SLOTS 3-12: UNUSED The remaining slots in the audio input frame are not used by the WM9709. All bits in these slots will be stuffed with 0s. AC-LINK LOW POWER MODE ...
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... Production Data SERIAL INTERFACE REGISTER MAP DESCRIPTION See Table 1. Only special production test modes and vendor ID readback are supported by the WM9709 register map. The test mode addresses are chosen to avoid conflict with any data that might be written to normal AC’97 register addresses. ...
Page 14
... De-coupling for DVDD and AVDD Reference de-coupling capacitors for DAC Output AC coupling caps to remove VREF DC level from outputs. Optional capacitors for better crystal frequency stability. WM9709 master clock frequency. A bias resistor is not required, but if connected will not affect operation if value is large (above 1M ). Production Data AVDD ...
Page 15
... In more demanding applications, such as DVD playback, more filtering and a lower output impedance are often required. Due to the use of a low order sigma delta modulator on WM9709, a second order filter may suffice. Additional filtering may not result in any significant noise reduction. ...
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... WM9709 AC = 1Vrms 8.72K 18K DC = 2.5V Output from WM9709 220pF AGND Figure 12 Typical External Filter and Components w 1nF +12V + 4.7uF _ 2K2 10K 2K2 Production Data +12V + 10uF 0.1uF AC = 2Vrms 100R Clamp Signal Optional 270pF clamp device for reducing power on/ FMMT617 off noise PD Rev 1 ...
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... B. THIS DRAWING IS SUBJECT TO CHANGE WITHOUT NOTICE. C. BODY DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSION, NOT TO EXCEED 0.20MM. D. MEETS JEDEC.95 MO-150, VARIATION = AE. REFER TO THIS SPECIFICATION FOR FURTHER DETAILS -C- 0.10 C SEATING PLANE MAX ----- 2.0 ----- ----- 1.85 0.30 0.38 ----- 0.25 7.50 8.20 5.60 0. WM9709 DM0015.B GAUGE PLANE 0. Rev 1.3 February 2003 17 ...
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... WM9709 IMPORTANT NOTICE Wolfson Microelectronics plc (WM) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current. All products are sold subject to the WM terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability ...