MS6712 MOSA 4 Stereo Inputs / 4-Channel Outputs Audio Processor 4 Stereo Inputs and 4-Channel Outputs Volume, Tone, Balance, Fader, Loudness, and Selectable Input Gain FEATURES APPLICATIONS •Operation range : 2.7V~6.5V •4 stereo inputs with selectable input gain •4 independent speaker controls for fader and balance •Tone controls (treble and bass) and loudness function •Independent mute function •Volume control in 1.25 dB/step •I2C interface •Components less and good PSRR •Housed in SOP32 packages •Portable audio device •Car stereo audio •Hi-Fi audio system DESCRIPTION The MS6712 is a 4 stereo inputs/4-channel outputs digital control audio processor for the low voltage operation. Volume, tone (bass and treble), balance (left/right), and fader (front/rear) processor are incorporated into a single chip. The MS6712 also has the loudness function and selectable input gain. These functions can be built a Hi-Fi audio system easily. All functions are programmable via the serial I2C bus. The default states of the chip as the power is on are: the volume is -78.75dB, the stereo 4 is selected, all the speakers are mute and the gains of the input stage, the bass and the treble are 0dB. BLOCK DIAGRAM LOUT 21 LIN LOUD_L BOUT_L BIN_L 20 15 23 22 TREB_L 5 Speaker ATT RB LIN1 LIN2 LIN3 LIN4 RIN4 RIN3 RIN2 RIN1 19 18 17 16 Volume & Londness OUT_LF Bass Treble Speaker ATT 27 OUT_LR Mute Input Selector &Gain Control 10 11 12 13 29 Mute 32 SCL 31 SDA 30 DGND Serial Bus Decoder and Latches Volume & Londness Bass Treble Speaker ATT 28 OUT_RF Mute 2 3 1 8 AVDD AGND REF ROUT REV 2 Speaker ATT RB Supply 7 9 25 24 RIN LOUD_R BOUT_R BIN_R 1/17 6 26 OUT_RR Mute TREB_R www.mosanalog.com MS6712 MOSA 4 Stereo Inputs / 4-Channel Outputs Audio Processor PIN CONFIGURATION Symbol REF Pin 1 Description Analog Reference Voltage（1/2VDD） VDD AGND 2 3 Supply Input Voltage Analog Ground NC 4 No connected TREB_L TREB_R 5 6 Left Channel Input for Treble Controller Right Channel Input for Treble Controller RIN ROUT 7 8 Audio Processor Right Channel Input Gain Output and Input Selector for Right Channel LOUD_R RIN4 9 10 Right Channel Loudness Input Right Channel Input 4 RIN3 11 Right Channel Input 3 RIN2 RIN1 12 13 Right Channel Input 2 Right Channel Input 1 NC LOUD_L 14 15 No connected Left Channel Loudness Input REF 1 32 SCL VDD 2 31 SDA AGND 3 30 DGND NC 4 29 OUT_LF TREB_L 5 28 OUT_RF TREB_R 6 27 OUT_LR RIN 7 26 OUT_RR ROUT 8 MS6712 LOUD_R 9 25 BOUT_R 24 BIN_R LIN4 16 Left Channel Input 4 LIN3 LIN2 17 18 Left Channel Input 3 Left Channel Input 2 RIN4 10 23 BOUT_L RIN3 11 22 BIN_L LIN1 LIN 19 20 Left Channel Input 1 Audio Processor Left Channel Input RIN2 12 21 LOUT RIN1 13 20 LIN LOUT BIN_L 21 22 Gain Output and Input Selector for Left Channel Left Bass Controller Input Channel BOUT_L 23 Left Bass Controller Output Channel BIN_R BOUT_R 24 25 Right Bass Controller Input Channel Right Bass Controller Output Channel OUT_RR OUT_LR 26 27 Right Rear Speaker Output Left Rear Speaker Output OUT_RF 28 Right Front Speaker Output OUT_LF DGND 29 30 Left Front Speaker Output Digital Ground SDA SCL 31 32 I2C Data Input I2C Clock Input REV 2 2/17 NC 14 19 LIN1 LOUD_L 15 18 LIN2 LIN4 16 17 LIN3 SOP32 www.mosanalog.com MS6712 MOSA 4 Stereo Inputs / 4-Channel Outputs Audio Processor ORDERING INFORMATION Package Part number Packaging Marking Transport Media 32-Pin SOP (lead free) MS6712GTR MS6712G 1k Units Tape and Reel 32-Pin SOP (lead free) RoHS Compliance MS6712GU MS6712G 22 Units Tube ABSOLUTE MAXIMUM RATINGS Symbol VDD Parameter Supply Voltage Rating Unit 6.5 V VESD Electrostatic Handling -3000 to 3000 V TSTG Storage Temperature Range -65 to 150 ℃ TA Operating Ambient Temperature Range -40 to 85 ℃ TJ Maximum Junction Temperature 150 ℃ TS Soldering Temperature, 10 seconds 260 ℃ RTHJA Thermal Resistance from Junction to Ambient in Free Air SOP32 210 ℃/W OPERATING RATINGS Symbol VDD REV 2 Parameter Supply Voltage 3/17 Min Typ Max Unit 2.7 - 6.5 V www.mosanalog.com MS6712 MOSA 4 Stereo Inputs / 4-Channel Outputs Audio Processor 5V ELECTRICAL CHARACTERISTICS (Ta=25℃, All stages 0dB, f=1kHz, CREF =22uF, refer to the application circuit; unless otherwise specified) Parameter Symbol Conditions Min Typ Max Unit Supply IQ Quiescent Current VIN=0V - 12.2 12.5 mA PSRR Power Supply Rejection Ratio CREF = 22uF, f = 100Hz 55 60 - dB Input Selectors RIN Input Resistance Input 1,2,3,4 35 50 70 kΩ GIN Input Gain Range Gain 0 - 11.25 dB GSTEP Step Resolution - 3.75 - dB ERRG Gain Setting error -0.2 0 0.2 dB LOUD Loudness 19 20 - dB -78.75 - 0 dB - 1.25 - dB -0.5 0 1 dB -1 0 5 dB -37.5 - 0 dB - 1.25 - dB -0.2 0 0.1 dB - -65 -60 dB Boost/Cut -14 - 14 dB - 2 - dB f =100Hz -0.3 0 0.1 dB 34 44 58 kΩ Boost/Cut -14 - 14 dB CLoud=100nF, f =20Hz Volume=-40dB Volume control CRVOL Volume Control Range RESVOL Volume Step Resolution ERRVOL Volume Setting Error Attenuation Av = 0 to -40dB Av = -40 to -60dB Speaker Attenuators CRSPK Speaker Control Range RESSPK Speaker Step Resolution ERRSPK Speaker Setting Error MUTE Output Mute Attenuation Attenuation Bass Control CRBAS Bass Control Range RESBAS Bass Step Resolution ERRBAS Speaker Setting Error RB Internal Feedback Resistance Treble Control CRBAS Treble Control Range RESBAS Treble Step Resolution - 2 - dB ERRBAS Treble Setting Error f =20kHz -0.3 0 0.1 dB VOMAX Maximum Output Voltage Swing (THD+N)/S <0.3% 4.3 4.5 - Vpp THD+N Total Harmonic Distortion Plus Noise VOUT=2Vpp - -75 0.0177 - dB % S/N Signal-to-Noise Ratio VOUT=4Vpp - 97 - dB CS Channel Separation Left/Right 93 97 - dB VIH Bus High Input Level 2 - - V VIL Bus Low Input Level - - 0.8 V General Bus Input Notes: Bass and Treble response see to curve. The center frequency and quality of the response behavior can be chosen by the external. REV 2 4/17 www.mosanalog.com MS6712 MOSA 4 Stereo Inputs / 4-Channel Outputs Audio Processor 2.7V ELECTRICAL CHARACTERISTICS (Ta=25℃, All stages 0dB, f=1kHz, CREF =22uF, refer to the application circuit; unless otherwise specified) Parameter Symbol Conditions Min Typ Max Unit Supply IQ Quiescent Current VIN=0V PSRR Power Supply Rejection Ratio CREF = 22uF, f = 100Hz VOMAX Maximum Output Voltage Swing (THD+N)/S <0.3% THD+N Total Harmonic Distortion Plus Noise VOUT=2Vpp S/N Signal-to-Noise Ratio VOUT=2.5Vpp CS Channel Separation Left/Right - 8.7 9 mA 53 58 - dB - 2.5 - Vpp - -50 - dB General - 0.3 - % 90 94 - dB 90 94 - dB TYPICAL PERFORMANCE CHARACTERISTICS (Ta=25℃, All stages 0dB, f=1kHz, CREF =22uF, refer to the application circuit; unless otherwise specified) VDD=5V Volume=-40dB VDD=5V Loud (dB) Loud (dB) Loud (dB) 100nF OPEN 33nF 10nF 220nF Loudness OFF 56nF VDD=5V CLOUD = 100nF Loudness vs. Volume Loudness vs. Frequency vs. Volume Loudness vs. External Capacitors VDD=5V Treble=Bass= -14~14dB REV 2 VDD=2.7V VIN=-3dBV VDD=5V VIN=0dBV QUIESCENT CURRENT (mA) FREQUENCY (Hz) CHANNEL SEPARATION (dB) FREQUENCY (Hz) Tone (dB) FREQUENCY (Hz) FREQUENCY (Hz) FREQUENCY (Hz) SUPPLY VOLTAGE (V) Typical Tone Response Channel Separation vs. Frequency Quiescent Current vs. Supply Voltage 5/17 www.mosanalog.com MS6712 MOSA 4 Stereo Inputs / 4-Channel Outputs Audio Processor VDD=2.7V VO=2Vpp THD+N (%) THD+N (%) THD+N (%) f=1kHz f=20kHz f=20Hz VDD=5V VO=2Vpp f=20kHz f=1kHz VDD=5V VDD=2.7V FREQUENCY (Hz) OUTPUT VOLTAGE (dBV) OUTPUT VOLTAGE (dBV) THD+N vs. Frequency THD+N vs. Output Voltage THD+N vs. Output Voltage CAP=22uF CAP=10uF VDD=5V VRR=-20dBV PSRR (dB) PSRR (dB) CAP=22uF REV 2 f=20Hz CAP=10uF VDD=2.7V VRR=-20dBV FREQUENCY (Hz) FREQUENCY (Hz) PSRR vs. Frequency PSRR vs. Frequency 6/17 www.mosanalog.com MS6712 MOSA 4 Stereo Inputs / 4-Channel Outputs Audio Processor I2C BUS DESCRIPTION Start and Stop Conditions A start condition is activated when the SCL is set to HIGH and SDA shifts from HIGH to LOW state. The stop condition is activated when SCL is set to HIGH and SDA shifts from LOW to HIGH state. Please refer to the timing diagram below. SCL SDA Stop Start SCL : Serial Clock Line, SDA : Serial Data Line Data Validity A data on the SDA line is considered valid and stable only when the SCL signal is in HIGH state. The HIGH and LOW states of the SDA line can only change when the SCL signal is LOW. Please refer to the figure below. SDA SCL Data line stable, Data valid Data change allowed Byte Format Every byte transmitted to the SDA line consists of 8 bits. Each byte must be followed by an acknowledge bit. The MSB is transmitted first. Acknowledge During the Acknowledge clock pulse, the master (up) put a resistive HIGH level on the SDA line. The peripheral (audio processor) that acknowledges has to pull-down (LOW) the SDA line during the Acknowledge clock pulse so that the SDA line is in a stable LOW state during this clock pulse. Please refer to the diagram below. SCL 1 2 3 7 8 9 SDA MSB Acknowledge Start The audio processor that has been addressed has to generate an Acknowledge after receiving each byte, otherwise, the SDA line will remain at the HIGH level during the ninth (9th) clock pulse. In this case, the master transmitter can generate the STOP information in order to abort the transfer. REV 2 7/17 www.mosanalog.com MS6712 MOSA 4 Stereo Inputs / 4-Channel Outputs Audio Processor Timing of SDA and SCL Bus Lines SDA tf tLOW SCL S tHD;STA tSU;DAT tr tHD;DAT Standard Mode Symbol fSCL tHD;STA tf tSU;STA tHIGH tSP tSU;STO Sr Parameter tBUF tr P S Min Max Unit 0 100 kHz 4.0 - us tLOW SCL clock frequency Hold time (repeated) START condition. After this period, the first clock pulse is generated LOW period of the SCL clock 4.7 - us tHIGH HIGH period of the SCL clock 4.0 - us tSU:STA 4.7 - us 0 3.45 us tSU:DAT Set-up time for a repeated START condition Data hold time: For I2C-bus devices Data-set-up time 250 - ns tr Rise time of both SDA and SCL signals - 1000 ns tf Fall time of both SDA and SCL signals - 300 ns tSU:STO Set-up time for STOP condition 4.0 - us tBUF Bus free time between a STOP and START condition 4.7 - us Cb Capacitive load for each bus line - 400 pF VnL Noise margin at the LOW level for each connected device (including 0.1VDD hysteresis) - V VnH Noise margin at the HIGH level for each connected device (including 0.2VDD hysteresis) - V tHD:STA tHD:DAT BUS INTERFACE Data are transmitted to and from the MCU to the MS6712 via the SDA and SCL. The SDA and SCL make up the BUS interface. It should be noted that pull-up resistors must be connected to the positive supply voltage. VDD Rp Rp Pull up resistors SDA (Serial Data Line) SCL (Serial Clock Line) MCU REV 2 MS6712 8/17 www.mosanalog.com MS6712 MOSA 4 Stereo Inputs / 4-Channel Outputs Audio Processor Interface Protocol The format consists of the following •A START condition •A chip address byte including the MS6712 address. (7bits) •The 8th bit of the byte must be “0”.(write=0, read=1) •MS6712 must always acknowledge the end of each transmitted byte. •A data sequence (N-bytes + Acknowledge) •A STOP condition SDA SCL 1-7 8 ADDRESS W R / -- 9 1-7 8 9 1-7 8 9 S P START CONDITION ACK DATA ACK DATA ACK STOP CONDITION Address Code The chip address of the MS6712 is 88H. 1 0 0 0 1 0 0 0 7 bits address W MS6712 address Data Bytes Description The default states of the chip as the power is on are: the volume is -78.75dB, the stereo 4 is selected, all the speakers are mute and the gains of the input stage, the bass and the treble are 0dB. MSB LSB Function Volume Control 0 0 B2 B1 B0 A2 A1 A0 1 1 0 B1 B0 A2 A1 A0 Speaker ATT LR 1 1 1 B1 B0 A2 A1 A0 Speaker ATT RR 1 0 0 B1 B0 A2 A1 A0 Speaker ATT LF 1 0 1 B1 B0 A2 A1 A0 Speaker ATT RF 0 1 0 G1 G0 S2 S1 S0 Audio Switch 0 1 1 0 C3 C2 C1 C0 Bass Control 0 1 1 1 C3 C2 C1 C0 Treble Control Where Ax = 1.25dB/step; Bx = 10dB/step; Cx = 2dB/step; Gx = 3.75dB/step REV 2 9/17 www.mosanalog.com MS6712 MOSA 4 Stereo Inputs / 4-Channel Outputs Audio Processor Volume MSB 0 0 0 0 B2 B1 B0 LSB Function A2 A1 A0 Volume 1.25 dB steps 0 0 0 0 0 0 1 -1.25 0 1 0 -2.5 0 1 1 -3.75 1 0 0 -5 1 0 1 -6.25 1 1 0 -7.5 1 1 1 -8.75 A2 A1 A0 Volume 10dB steps B2 B1 B0 0 0 0 0 0 0 1 -10 0 1 0 -20 0 1 1 -30 1 0 0 -40 1 0 1 -50 1 1 0 -60 1 1 1 -70 The default volume is –78.75dB. Speaker Attenuator MSB LSB Function（ （dB） ） 1 0 0 B1 B0 A2 A1 A0 Speaker LF 1 0 1 B1 B0 A2 A1 A0 Speaker RF 1 1 0 B1 B0 A2 A1 A0 Speaker LR 1 1 1 B1 B0 A2 A1 A0 Speaker RR 0 0 0 0 0 0 1 -1.25 0 1 0 -2.5 0 1 1 -3.75 1 0 0 -5 1 0 1 -6.25 1 1 0 -7.5 1 1 1 -8.75 0 0 0 0 1 -10 1 0 -20 1 1 -30 1 1 1 1 1 Mute LF: Left Front, RF: Right Front, LR: Left Rear, RR: Right Rear The default state is mute. REV 2 10/17 www.mosanalog.com MS6712 MOSA 4 Stereo Inputs / 4-Channel Outputs Audio Processor Audio Switch LSB Function S1 S0 Audio Switch 0 0 Stereo 1 0 1 Stereo 2 1 0 Stereo 3 1 1 Stereo 4 MSB 0 1 0 G1 G0 S2 0 Loudness ON 1 Loudness OFF 0 0 +11.25dB 0 1 +7.5dB 1 0 +3.75dB 1 1 0dB The default state is stereo 4, loudness off and gain 0dB. Bass and Treble MSB LSB Function（ （dB） ） 0 1 1 0 C3 C2 C1 C0 Bass 0 1 1 1 C3 C2 C1 C0 Treble 0 0 0 0 -14 0 0 0 1 -12 0 0 1 0 -10 0 0 1 1 -8 0 1 0 0 -6 0 1 0 1 -4 0 1 1 0 -2 0 1 1 1 0 1 0 0 0 0 1 0 0 1 2 1 0 1 0 4 1 0 1 1 6 1 1 0 0 8 1 1 0 1 10 1 1 1 0 12 1 1 1 1 14 The default state is bass 0dB and treble 0dB. REV 2 11/17 www.mosanalog.com MS6712 MOSA 4 Stereo Inputs / 4-Channel Outputs Audio Processor Examples Set Volume at –37.5dB. MSB Start Data byte LSB MS6712 Address ACK 0 0 0 1 1 1 -30dB 1 0 ACK Stop 0 ACK Stop 1 1 ACK Stop 0 1 ACK Stop ACK Stop -7.5dB Set Speaker RF at –30dB. MSB Start Data byte LSB MS6712 Address ACK 1 0 1 1 Speaker RF 1 0 -30dB 0 0dB Set Speaker RR in mute-on. MSB Start Data byte LSB MS6712 Address ACK 1 1 1 1 1 Speaker RR 1 Mute Set Stereo 2 Input with gain of +7.5 dB and Loudness on. MSB Start Data byte LSB MS6712 Address ACK 0 1 0 0 1 0 +7.5dB Stereo 2 Loudness ON Set Treble at -10dB. MSB Start MS6712 Address Data byte LSB ACK 0 1 1 1 0 1 0 -10dB Treble REV 2 0 12/17 www.mosanalog.com MS6712 MOSA 4 Stereo Inputs / 4-Channel Outputs Audio Processor APPLICATION INFORMATION Basic Application Example 5.6K 2.2u MCU 16 10 TREB_L 11 BIN_L 17 2.7n 5 22 BOUT_L INPUT 23 LOUD_L 12 15 LIN 18 20 LOUT 13 21 32 SCL 19 SDA DGND 2.2u 31 100n 100n 100n 30 10u LIN1 RIN1 OUT_LF LIN2 RIN2 OUT_LR 10u 27 MS6712 LIN3 RIN3 OUTPUT 10u OUT_RF LIN4 RIN4 28 10u OUT_RR 9 25 100n 24 100n 26 TREB_R 7 22u BIN_R 8 BOUT_R 1 RIN ROUT 3 REF AGND AVDD 2 LOUD_R 2.2u AVDD 29 100n 6 2.7n 2.2u 5.6K REV 2 13/17 www.mosanalog.com MS6712 MOSA 4 Stereo Inputs / 4-Channel Outputs Audio Processor EXTERNAL DIMENSIONS SOP32 (300mil) D Detail A E H h x45 C A e B A1 0.25mm θ Detail A Dimension in mm L Dimension in inch Symbol Min Min Max A 2.35 2.65 0.0926 0.1043 A1 0.10 0.30 0.0040 0.0118 B 0.33 0.51 0.013 0.020 C 0.23 0.32 0.0091 0.0125 e REV 2 Max 1.27 BASIC 0.050 BASIC E 7.40 7.60 0.2914 0.2992 H 10.00 10.65 0.394 0.419 L 0.40 1.27 0.016 0.050 D 20.32 20.73 0.800 0.816 h θ 0.25 0.75 0.010 0.029 o 0 o 8 14/17 o 0 8o www.mosanalog.com MS6712 MOSA 4 Stereo Inputs / 4-Channel Outputs Audio Processor DEMO BOARD The demo board used IR technique controller to control the MS6712. The default states of demo board are Stereo 4, Input Gain 0dB, Volume –20dB, Attenuator Speakers 0dB, Loudness Off, Bass 0dB and Treble 0dB. 2 3 1 5 1 4 Label 1: Supply Voltage The AVDD and DVDD should be the same supply voltage, the supply range is 2.7~6.5 VDC. Label 2: LED Indicator The LEDs indicate stereo input channel , IR received status and power status. It is red-dark blink once when the MCU has received the function code correctly. Label 3: Output Section There are four output channels in the section that divide into front output and rear output. Please connected to a postpower-amplifier, as active speaker. Label 4: Input Section There are four stereo inputs in the section. Please input stereo audio signal, as music or sine wave. Label 5: MCU Reset The MS6712 will be loaded the default values by MCU. The default states are Stereo 4, Input Gain 0dB, Volume –20dB, Attenuator Speakers 0dB, Loudness Off, Bass 0dB and Treble 0dB. REV 2 15/17 www.mosanalog.com MS6712 MOSA 4 Stereo Inputs / 4-Channel Outputs Audio Processor IR Controller IN1, IN2, IN3, IN4 : Select Stereo Input. IN1, 2, 3, 4 represents Stereo Input 1, 2, 3, 4. The active input will be indicated by the LEDs. VOL+, VOL- : The volume control keys. The volume control in 1.5dB/step as the switch is pressed once, the range is –79dB to 0dB. LF-speaker , RF-speaker, LR-speaker, and RR-speaker are synchronic action. Gain+, Gain- : The gain control keys for stereo input. The gain control in 3.75dB/step as the switch is pressed once, the range is 0dB to 11.25dB. LF+, LF- : The attenuation control keys for Left-Front speaker. The attenuation in 1.25dB/step as the switch is pressed once, the range is -37.5dB to 0dB. RF+, RF- : The attenuation control keys for Right-Front speaker. The attenuation in 1.25dB/step as the switch is pressed once, the range is -37.5dB to 0dB. LR+, LR- : The attenuation control keys for Left-Rear speaker. The attenuation in 1.25dB/step as the switch is pressed once, the range is -37.5dB to 0dB. RR+, RR- : The attenuation control keys for Right-Rear speaker. The attenuation in 1.25dB/step as the switch is pressed once, the range is -37.5dB to 0dB. TRE+, TRE- : The treble control keys. The treble control in 2dB/step as the switch is pressed once, the range is –14dB to 14dB. BAS+, BAS- : The bass control keys. The bass control in 2dB/step as the switch is pressed once, the range is -14dB to 14dB. Loud : The loudness key Press the key once to set loudness on or loudness off. Mute : The mute key controls all output speaker outputs Press the key once to set mute-on or mute-off for four speaker outputs. REV 2 16/17 www.mosanalog.com MS6712 MOSA 4 Stereo Inputs / 4-Channel Outputs Audio Processor Circuit J1 1 2 + RX TX 1 2 3 220 + C1 10u C4 0.1u DVCC J3 R1 DVCC + C3 10u S1 10K + C6 RX TX IR_IN 20P SCL SDA C7 + AVDD 1 2 3 4 5 6 7 8 9 10 1 2 Vcc P1.7 P1.6 P1.5 P1.4 P1.3 P1.2 P1.1 P1.0 P3.7 20 19 18 17 16 15 14 13 12 11 IR_IN 1 + C5 470p GND IR IR J4 + 22u + + 10u C14 J9 + 10u C15 10u C16 + MS6712 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 SCL SDA 10u C8 10u C11 10u C32 + 10u C13 J6 SCL SDA DGND LFOUT RFOUT LROUT RROUT BOUT_R BIN_R BOUT_L BIN_L LOUT LIN LIN1 LIN2 LIN3 + C12 REF VDD AGND CODE TREB_L TREB_R RIN ROUT LOUD_R RIN4 RIN3 RIN2 RIN1 NC LOUD_L LIN4 + 9 8 7 6 5 4 3 2 1 10u + 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 OUT D1 Power + C27 AVDD + + C9 C10 0.1u 0.1u RST P3.0 P3.1 XTAL2 XTAL1 P3.2 P3.3 P3.4 P3.5 GND VS AT89X51 20P INPUT J8 IN3 J2 3 5 4 3 2 1 Y1 12M IN4 + 2 LCD J7 C2 47u R3 10K U1 RST R4 J5 R2 1K C33 FRONT_OUT J12 10u REAR_OUT U2 + J10 C19 2.2u + 10u C17 10u C18 + IN2 J11 10u C25 + C24 C20 C21 + + C22 + C23 + 0.1u 0.1u 0.1u 0.1u + IN1 10u + + + + + C28 2.7n C29 2.7n C30 0.1u C31 0.1u C26 2.2u R5 5.6K R6 5.6K W1 Jumper REV 2 17/17 www.mosanalog.com