SM7183 ECHO 三合微科股份有限公司 SAMHOP Microelectronics Corp. GENERAL DESCRIPTIONS FEATURES SM7183 is an Audio Echo Processor using CMOS Technology. It has built-in AD/DA and 30KBits SRAM for time delay. Three sample rate selection and eight delay time selection. Many combination to fit your applications. * Built-in adjustable OSC. * Built-in power on reset circuit. * Built-in 30KBits SRAM for delay control. * Adjustable delay time setting: Echo Mode: 20.5ms ~ 163.8ms Surround Mode: 4.1ms ~ 41.0ms (Based on 6MHz OSC) * Direct control & Micro-processor control interface. * Auto muting during power up and change mode. APPLICATIONS PIN ASSIGNMENT * * * * * VCD Karaok TV Audio System Car Stereo AVDD VREF AGND DGND NC1 OSCR SDI/PDI DVDD Test EC/SR SDReq/PD1 SDCK/PD2 SDData/PD3 Mute Page 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 OP1-IN OP1-OUT ECFB NC2 OP2-OUT OP2-IN DAC-OUT DAC-IN ADC-OUT ADC-IN ADCTL-2 ADCTL-1 DACTL-2 DACTL-1 V.2.0 MAR. 8, 2002 三合微科股份有限公司 SAMHOP Microelectronics Corp. SM7183 ECHO PIN DESCRIPTION Pin No. Pin Name I/O Function 1 AVDD Power Analog positive power supply 2 VREF AI/O Analog reference voltage 3 AGND Power Analog negative power supply 4 DGND Power Digital negative power supply 5 NC1 6 OSCR OSC Add resistor to modify internal OSC 7 SDI/PDI IN Micro processor Serial interface or Parallel input selection 8 DVDD Power Digital positive power supply 9 Test IN Test mode input 10 EC/SR IN Echo or Surround mode selection 11 SDReq/PD1 IN 12 SDCK/PD2 IN 13 SDData/PD3 IN 14 Mute IN Mute control 15 DACTL-1 AIN DAC control pin1 16 DACTL-2 AIN DAC control pin2 17 ADCTL-1 AIN ADC control pin1 18 ADCTL-2 AIN ADC control pin2 19 ADC-IN AIN ADC OP input 20 ADC-OUT AOUT ADC OP output 21 DAC-IN AIN DAC OP input 22 DAC-OUT AOUT DAC OP output 23 OP2-IN AIN OP2 input 24 OP2-OUT AOUT OP2 output 25 NC2 26 ECFB AOUT Echo feed back pin 27 OP1-OUT AIN OP1 output 28 OP1-IN AOUT OP2 input No connection Micro processor Serial interface or Parallel input No connection Page 2 V.2.0 MAR. 8, 2002 SM7183 ECHO 三合微科股份有限公司 SAMHOP Microelectronics Corp. BLOCK DIAGRAM D A C T L 1 ECFB OP1-IN Low Pass Filter OP2-IN D A C T L 2 D A C D A C A D C A D C I N O U T O U T I N A D C T L 1 A D C T L 2 AVDD AD Converter AGND Mix SRAM DVDD OP1-OUT Low Pass Filter OP2-OUT OSC OSCR Verf VREF DGND DA Converter POR Digital Control SDI/PDI TEST EC/SR Page 3 PD1 Mute PD2 PD3 V.2.0 MAR. 8, 2002 SM7183 ECHO 三合微科股份有限公司 SAMHOP Microelectronics Corp. FUNCTION DESCRIPTIONS: Internal Control Register : Serial Interface: There is one register for SM7183's mode selection, mute control and delay time setting. This 5-bits register can only be access by tie SDI/PDI pin to VDD. When SDI/PDI is tie to VDD, the SM7183's state is control by this internal 5 Bits register. These bits are Mode for select Echo/Surround, Mute, Delay 1, Delay 2, Delay 3 for control delay time. SDReq SDCK SDData 0 1 2 3 4 5 6 When SDREQ is low then SM7183 is ready for received data from SDDATA. SM7183 will latch the SDDATA using the SDCK's negative edge. BIT 0,1 are unused data. BIT 2 is Mode as EC/SR BIT 3 is Mute as MUTE BIT 4 is Delay 1 as PD1 BIT 5 is Delay 2 as PD2 BIT 6 is Delay 3 as PD3 Parallel Mode: There are corresponding pin for the 5 bits when SDI/PDI is tie to VSS, the SM7183's state is control by external pins, like MUTE, Echo/Surround, PD1, PD2, PD3. The 5-Bits register can be access by SDReq, SDCK, SDData pin follow the following timing diagram. Page 4 V.2.0 MAR. 8, 2002 三合微科股份有限公司 SAMHOP Microelectronics Corp. SM7183 ECHO Echo Mode & Surround Mode Audio out Low Pass Filter Audio In AD Converter Add SRAM Low Pass Filter DA Converter Echo Mode Audio In Low Pass Filter AD Converter SRAM Audio Out Low Pass Filter DA Converter Surround Mode When EC/SR pin is tie to VDD then SM7183 is set to Echo Mode. When EC/SR pin is tie to GND then SM7183 is set to Surround Mode. The only difference between echo mode and surround mode are there is no feed back & add path inside the SM7183. And the delay time is shorter for surround mode then echo mode. But surround mode provide higher sampling rate and better sound quality then echo mode. MUTE CONTROL After power up the SM7183 will turn off its output for 350 ms. Any change of the EC/SR, PD1~2 pin and internal register, SM7183 will mute and turn off its output for 350 ms. Page 5 V.2.0 MAR. 8, 2002 SM7183 ECHO 三合微科股份有限公司 SAMHOP Microelectronics Corp. DELAY TIME TABLE Surround Mode PD1 PD2 PD3 Sample Rate Delay Time 0 0 0 0 750KHZ 4.1ms 0 1 1 0 750KHZ 10.2ms 0 1 0 0 750KHZ 14.3ms 0 0 1 0 750KHZ 20.5ms 0 1 0 1 750KHZ 24.6ms 0 0 0 1 750KHZ 30.7ms 0 0 1 1 750KHZ 34.8ms 0 1 1 1 750KHZ 41.0ms Echo Mode PD1 PD2 PD3 Sample Rate Delay Time 1 0 0 0 375KHZ 20.5ms 1 1 1 0 375KHZ 41.0ms 1 1 0 0 375KHZ 61.4ms 1 0 1 0 375KHZ 81.9ms 1 1 0 1 187.5KHZ 98.3ms 1 0 0 1 187.5KHZ 122.9ms 1 0 1 1 187.5KHZ 139.3ms 1 1 1 1 187.5KHZ 163.8ms NOTE: All the value are based on internal OSC is 6MHz Page 6 V.2.0 MAR. 8, 2002 SM7183 ECHO 三合微科股份有限公司 SAMHOP Microelectronics Corp. AC CHARACTERISTICS o ( Vcc = 5.0V, f in = 1KHz, Vi = 100mVrms, fck = 6MHz, Ta = 25 C, unless otherwise noted ) Symbol Parameter Icco Supply current Gv Voltage gain RL = 47KΩ Vomax Maximum output voltage THD = 10% THD Output distortion No Output noise voltage PSRR Power supply rejection ratio Tmute Mute time Test Condition 30KHz L.P.F. Min. Typ. Max. Unit 0.7 60 100 mA -0.5 2.5 dB 1.2 Vrms Echo mode 1.5 3.0 % Surround mode 0.3 1.0 % Echo mode DIN Audio Surround mode Vcc = -20dBV -85 -60 dBV -90 -70 dBV -40 -25 dB f = 100Hz Echo mode 515 520 525 msec Surround mode 122 127 132 msec DC CHARACTERISTICS Symbol Parameter Vcc Supply voltage Icc Supply current V IH "H" input voltage V IL "L" input voltage Limits Min Typ Max 4.5 5 5.5 V 60 100 mA V 3V 1.5V Page 7 Unit V V.2.0 MAR. 8, 2002 SM7183 ECHO 三合微科股份有限公司 SAMHOP Microelectronics Corp. ABSOLUTE MAXIMUM RATINGS ( Ta = 25 ℃, unless otherwise noted ) Symbol Description Limits Unit Vcc Supply voltage 6.5 V Icc Supply current 100 mA Pd Power dissipation 1.7 W Topr Operation temperature -20 ~ 75 ℃ Tstg Storage temperature -25 ~ 125 ℃ Page 8 V.2.0 MAR. 8, 2002 SM7183 ECHO 三合微科股份有限公司 SAMHOP Microelectronics Corp. ECHO MODE APPLICATION CIRCUIT Echo Mode OUTPUT INPUT 10μ F 100K 4.7K 4.7μF 15K 5600pF 4.7μF 15K 0.33μF 10 F 5600pF 0.33μF 50K 10K 0.047μF 15K 15K 10K 0.033μ F 27 0.047μF 7.5K 75K 7.5K 0.01μF 3K 560pF 28 75K 15K 560pF NC 26 25 24 0.01μF 23 22 21 20 19 18 17 16 15 19 10 11 12 13 14 SM7183 11 12 13 14 15 16 17 18 *10K 47μF 47μF 0.1μF 0.1μF 10K 20K +5V 0.1μF +5V 1. Pin 6 R is approximate 15K~25kΩ. 2. Represent Analog Ground. 3. Represent Digital Ground. Page 9 V.2.0 MAR. 8, 2002 SM7183 ECHO 三合微科股份有限公司 SAMHOP Microelectronics Corp. MIC PRE-AMP CIRCUIT MIC 1 C 0.02μF +12V 1μF 1K 20K 560 15K 47K 5 6 22μF 8 + 7 10μF 4.7K 47K OUTPUT 1K MIC 2 C 0.02μF 15K 100pF ~ 820pF 47K 1K 20K 560 1μF +12V 22μF 2 + - 1 10μF 4 47K 100pF ~ 820pF 4.7K 4.7K 3 4.7K 100μF Page 10 V.2.0 MAR. 8, 2002 SM7183 ECHO 三合微科股份有限公司 SAMHOP Microelectronics Corp. SURROUND MODE APPLICATION CIRCUIT INPUT OUTPUT 100K 3K 4.7μF 5600pF 10μF 15K 0.33μF 0.33μF 75K 75K 15K 5600pF 10K 15K 0.047μF 15K 10K 0.047μF NC 560pF 560pF 28 27 7.5K 26 7.5K NC 25 24 0.01μ F 0.01μF 23 22 21 20 19 18 17 16 15 19 10 11 12 13 14 SM7183 11 12 13 14 15 16 17 18 10K NC 47μF 47μF 0.1μF 0.1μF +5V 20K 0.1μF +5V Page 11 V.2.0 MAR. 8, 2002 SM7183 ECHO 三合微科股份有限公司 SAMHOP Microelectronics Corp. MUTE APPLICATION CIRCUIT 10K +5V +5V MIC OUTPUT 2 1K +5V +5V 8 IC1 1 + 4 3 7.5K +5V VR2 8 +1 +5V IC2 +4 2 2M 3 +5V 2 10K 1K 1K 7 6 IC3 3+ 4 PIN14 1K VR1 10K Q1 8550 VR2 Time 1.46M 11.0S 1.2M 9.0S 1.0M 7.6S 0.8M 6.0S 0.6M 4.5S 0.4M 3.0S Page 12 10μF V.2.0 MAR. 8, 2002