w WAN-0149 Pin Compatibility of the WM8766/68/72 INTRODUCTION The WM8766/68/72 is a family of six and eight channel DACs and one Codec. They are designed to be pin compatible in most applications and share identical register structures. This document demonstrates how easily interchangeable the devices are. PIN OUT OF THE WM8766/68/72 Figure 1 below shows the pin-out of all devices. • WM8766: Fourth pair of outputs (pins 19 and 20) and the fourth digital input (pin 10) are missing from the device leaving No Connection pins instead. • WM8768: Four sets of stereo outputs can be seen down the right hand side of the device with the digital inputs on the left hand side. • WM8772: Pins 19,20,10 are used as analogue inputs and a digital output for the ADC. WM8766, PIN CONFIGURATION 28 LEAD SSOP WM8768, PIN CONFIGURATION 28 LEAD SSOP WM8772, PIN CONFIGURATION 28 LEAD SSOP MODE 1 28 AVDD MODE 1 28 MCLK 2 27 AGND MCLK 2 27 AGND BCLK 3 26 VOUT3R BCLK 3 26 VOUT3R LRCLK 4 25 VOUT3L LRC 4 25 VOUT3L 24 VOUT2R DVDD 5 24 VOUT2R DVDD AVDD DGND 6 23 VOUT2L DGND 6 23 VOUT2L DIN1 7 22 VOUT1R DIN1 7 22 VOUT1R DIN2 8 21 VOUT1L DIN2 8 21 VOUT1L DIN3 9 20 VOUT4R DIN3 9 20 AINL DIN4 10 19 VOUT4L DOUT 10 19 AINR ML/I2S 11 18 VMID ML/I2S 11 18 VMID MC/IWL 12 17 VREFP MC/IWL 12 17 VREFP MD/DM 13 16 VREFN MD/DM 13 16 VREFN MUTE 14 15 TESTREF MUTE 14 15 REFADC Figure 1 WM8766, WM8768 WM8772 Pin Configurations The stereo channel VOUT4L/R has the same properties as the other three stereo channels (i.e. VOUT1L/R, VOUT2L/R, VOUT3L/R) for the WM8768 device. The analogue inputs to the WM8772 should be connected via AC coupling capacitors. Figure 2 overleaf shows the recommended external components for all 3 devices. Common pins are shown in black, pins that vary from device to device are colour coded. WOLFSON MICROELECTRONICS plc www.wolfsonmicro.com January 2004, Rev 1.5. Copyright 2004 Wolfson Microelectronics plc WAN_0149 Figure 2 WM8766/68/72 Recommended External Components Diagram w Rev 1.5 January 2004 2 WAN_0149 COMPONENT REFERENCE SUGGESTED VALUE DESCRIPTION De-coupling for DVDD and AVDD. C1 and C5 10µF C2 to C4 0.1µF De-coupling for DVDD and AVDD. C6 C7 C8 0.1µF 10µF 0.1µF Reference de-coupling capacitors for VMID and TESTREF pin. C9 10µF Filtering for VREFP. Omit if AVDD low noise. C10 1µF AC coupling for analogue input C11 1µF AC coupling for analogue input C12 10µF De-coupling for ADC ref C13 0.1µF R1 33Ω De-coupling for TESTREF. De-coupling for ADC ref Filtering for VREP. Use 0Ω if AVDD low noise. Table 1 External Components Description REGISTER MAPS OF THE WM8766/68/72 The register maps of the WM8766/68/72 are shown below in Table 2. Register R0-R9 and R31 are common to all devices with additional registers for VOUT4 in the WM8768 and the ADC in the WM8772. The table shows all registers for all devices. The keys below this describe which rows represent each device. For example, row R15(0Fh) describes register R15 for the WM8766 and row R15(0Fh) describes R15 in the WM8768. Registers in white rows are common to all devices. B B B B B B 1 1 1 1 1 1 5 4 3 2 1 0 R0(00h) 0 0 0 0 0 0 0 UPDATE LDA1[7:0] 011111111 R1(01h) 0 0 0 0 0 0 1 UPDATE RDA1[7:0] 011111111 R2(02h) 0 0 0 0 0 1 0 REGISTER B 9 B8 B7 B6 PL[8:5] PHASE[8:6] B5 B4 IZD DACIWL[5:4] B3 B2 B1 B0 PDWN DEEMP MUTE All DAC ALL DAC All DAC ATC DACBCP DEFAULT 100100000 DACLRP DACFMT[1:0] 000000000 R3(03h) 0 0 0 0 0 1 1 R4(04h) 0 0 0 0 1 0 0 UPDATE LDA2[7:0] 011111111 R5(05h) 0 0 0 0 1 0 1 UPDATE RDA2[7:0] 011111111 R6(06h) 0 0 0 0 1 1 0 UPDATE LDA3[7:0] 011111111 R7(07h) 0 0 0 0 1 1 1 UPDATE RDA3[7:0] 011111111 R8(08h) 0 0 0 1 0 0 0 UPDATE MASTDA[7:0] 011111111 R9(09h) 0 0 0 1 0 0 1 R31(1Fh) 0 0 1 w 1 1 1 1 DEEMP[8:6] DMUTE[5:3] RESET DZFM[2:1] ZCD 000000000 000000000 Rev 1.5 January 2004 3 WAN_0149 B B B B B B 1 1 1 1 1 1 5 4 3 2 1 0 R10(0Ah) 0 0 0 1 0 1 0 DACRATE[8:6] DACMS PWRDN ALL R10(0Ah) 0 0 0 1 0 1 0 DACRATE[8:6] DACMS PWRDN ALL R11(0Bh) 0 0 0 1 0 1 1 ADC OSR 0 1 0 0 0 0 R12(0Ch) 0 0 0 1 1 0 0 0 0 MPD 0 0 0 R12(0Ch) 0 0 0 1 1 0 0 0 0 MPD 0 0 ADCHP R13(0Dh) 0 0 0 1 1 0 1 UPDATE LDA4[7:0] 011111111 R14(0Eh) 0 0 0 1 1 1 0 UPDATE RDA4[7:0] 011111111 R15(0Fh) 0 0 0 1 1 1 1 0 0 0 MPD DEEMP 4 PHASE4 DMUTE 4 DZFM4 DACD4 000000000 R15(0Fh) 0 0 0 1 1 1 1 0 0 0 MPD 0 0 0 0 0 000000000 REGISTER B B8 9 B7 B6 B5 B4 B3 B2 B1 B0 DEFAULT DACD[3:1] 0 010000000 DACD[3:1] ADCPD 010000000 0 0 001000000 0 0 0 000000000 AMUTE ALL AMUTEL AMUTER 000000000 Table 2 Register Map of the WM8766/68/72 Key: WM8766/68/72 WM8768 WM8766/68 WM8772 WM8766 Device Active registers WM8766 WM8768 WM8772 For example, active registers in the WM8768 will be shown in rows that are coloured white, light blue, and red. Similarly, registers used in the WM8772 will be in rows coloured white and green. w Rev 1.5 January 2004 4 WAN_0149 APPLICATION SUPPORT If you require more information or require technical support please contact Wolfson Microelectronics Applications group through the following channels: Email: Telephone Apps: Fax: Mail: [email protected] +44 (0)131 272 7070 +44 (0)131 272 7001 Applications at the address on last page. or contact your local Wolfson representative. Additional information may be made available from time to time on our web site at http://www.wolfsonmicro.com w Rev 1.5 January 2004 5 WAN_0149 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. 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