STEVAL-CCA021V1

STEVAL-CCA021V1 USB audio demonstration board based on the STM32F103RE and TS4657 Data brief Features ■ STM32F103RE performance line microcontroller ■ 16 MHz crystal unit ■ USB connector and ESD protection ■ Two LEDs driven by the microcontroller ■ Push button to control the firmware mode ■ TS4657 - single supply stereo digital audio line driver with 2.2 VRMS capless outputs: – 16- to 24-bit audio data format stereo DAC, 32 to 48 kHz sample rate – I2S, right or left-justified compatible digital audio interface ■ TS2012 - filter-free stereo 2x2.8 W class D audio power amplifier ■ TS4962 - 2.8 W filter-free mono class D audio power amplifier – Output available either through mono jack connector or to on-board speaker ■ TS472 - very low noise microphone preamplifier with 2.0 V bias output and active low standby mode – Single-ended output available for connection to ADC of a microcontroller ■ On-board microphone and small speaker ■ RoHS compliant STEVAL-CCA021V1 Description The STEVAL-CCA021V1 demonstration board implements a USB audio card based on the STM32F103RE microcontroller and the TS4657 audio digital-to-analog converter (decoder). The complete system consists of a controller board driven by the STM32F103RE microcontroller, and a TS4657-based audio board. Mono audio output is available either through the TS4962-driven on-board speaker or via the mono jack connector, and stereo output is possible through the TS2012 stereo audio amplifier which can drive external speakers. Both audio amplifiers are class D. For audio input, an on-board microphone is connected through the TS472 microphone preamplifier to the ADC input of the microcontroller. It is possible to disconnect the controller section from the audio section to use the boards individually for other applications. September 2009 Doc ID 16318 Rev 1 For further information contact your local STMicroelectronics sales office. 1/5 www.st.com 5 2/5 C5 4.7uF 1 2 3 4 5 6 Doc ID 16318 Rev 1 SPI1_NSS SPI1_MISO CN1 MLW20G 3V3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 USB_A Vbus DD+ GND SH1 SH2 CN2 USB1X90A PCB C2 1uF Internal pull-down JTCK NRST R2 R9 10K 3V3 3V3 DBGACK R14 M25P64-VME6G 100nF U3 7 HOLD C 8 VCC D 1 S VSS 2 Q W C16 10K 10K Internal pull-up JTMS JTDO Internal pull-up R1 Internal pull-up 10K I/O1 Vbus I/O2 C4 10nF USBLC6-2P6 I/O1 GND I/O2 JTDI 1 2 3 U4 4 5 JTRST 4.7nF 1M Vout BYPASS LD3985XX33 INHB GND Vin U2 DBGRQ RTCK C6 R7 USB5V 3 2 1 6 5 4 3 3V3 6 5 4 1k5 3V3 3V3 R5 R3 4R7 USBDN USB5V 4R7 USBDP R4 C3 1uF SPI1_SCK SPI1_MOSI C1 4.7uF 3V3 Inductor 10mH L1 VSSA 3V3 10k R6 A3V3 C15 100nF C9 100nF NRST BOOT0 X1 X2 USBDN USBDP JTMS JTCK JTDI BUTTON PA0 PA1 PA2 PA3 SPI1_NSS SPI1_SCK SPI1_MISO SPI1_MOSI 13 32 48 64 19 1 7 60 5 6 54 41 42 43 44 45 46 49 50 14 15 16 17 20 21 22 23 STM32F103RET6 VDDA VDD_1 VDD_2 VDD_3 VDD_4 VBAT NRST BOOT0 OSC_IN/PD0 OSC_OUT/PD1 PD2 PA8 PA9 PA10 PA11 PA12 PA13/JTMS/SWDIO PA14/JTCK/SWCLK PA15/JTDI PA0-WKUP PA1 PA2 PA3 PA4 PA5 PA6 PA7 U1 GND X1 GND 3 X2 2 VSSA VSS_1 VSS_2 VSS_3 VSS_4 PC8 PC9 PC10 PC11 PC12 PC13-TAMPER-RTC PC14-OSC32_IN PC15-OSC32_OUT PC0 PC1 PC2 PC3 PC4 PC5 PC6 PC7 PB8 PB9 PB10 PB11 PB12 PB13 PB14 PB15 PB0 PB1 PB2/BOOT1 PB3/JTDO PB4/JNTRST PB5 PB6 PB7 TSX-3225 / 16MHz C8 33pF X1 1 4 12 31 47 63 18 39 40 51 52 53 2 3 4 8 9 10 11 24 25 37 38 61 62 29 30 33 34 35 36 26 27 28 55 56 57 58 59 C10 33pF VSSA R8 0R USB_ACTIVITY USB_ACTIVITY LED_ACTIVE I2S2_MCK PC0 PC1 PC2 PC3 I2S2_SD I2S2_WS I2S2_CK I2C1_SCL I2C1_SDA BOOT1 JTDO JTRST LD2 2 A3V3 1 3V3 B1 470 R12 2 4 6 8 10 12 14 16 18 20 3V3 220 R13 C12 100nF R10 10k 3V3 BL220G 1 3 5 7 9 11 13 15 17 19 P2 BUTTON C11 100nF VSSA PC3 PC2 PC1 PC0 PA3 PA1 2 LED_ACTIVE 2.3V C14 100nF GME 960-024 1 LD1 C13 100nF C7 100nF 3V3 PA2 PA0 I2S2_WS I2S2_CK I2S2_SD I2S2_MCK I2C1_SDA I2C1_SCL USB5V Figure 1. 2 1 1 USB5V Schematic diagrams STEVAL-CCA021V1 Schematic diagrams Schematic diagram of the STM32F103RE-based controller board GNDA 100nF C34 GND 5V0 GND 5V0 GND 5V0 C36 10uF/16V C35 10uF/16V C26 10uF/16V GND STBY_R STBY_L DAC_STBY SPK_STBY C16 100nF VCCA MICRO_SHDN MICRO_OUT 2 1 KEEG1542PBL U5 GNDA C27 1uF GND R6 5V0 2 4 6 8 10 12 14 16 18 20 LED1 1 3 5 7 9 11 13 15 17 19 680 P1 GNDA R12 1K R11 1K 100nF C19 100nF C20 GND DAC_FMT1 2.0V Bias IN- VCCA GNDA 10K R20 STDBY Bias G MICRO_SHDN 2 BYPS GNDA 16 9 OUT- DAC DAC 17 100pF 100pF C23 C18 LDO GAIN R15 10K LDO 1uF 1uF GND C3 C2 OUT+ Filters Digital GND Control Interface 1uF 5V0 5V0 Microphone Pre-Amplifier ST: TS472IQT 10 5 IN+ Audio Digital PCP NCP GND Interface DAC_STBY FMT1 FMT2 MCLK VCCA C17 100nF GND 8 8 7 6 R8 10K GNDA R7 10K DAC_MCLK BCLK SDAT 4 5 DAC_SDAT DAC_BCLK LRCLK 3 DAC_LRCLK DAC_FMT2 G0 G1 DAC_LRCLK DAC_BCLK DAC_SDAT DAC_MCLK DAC_FMT2 DAC_FMT1 5V0 9 GND LED_RED_0805 13 2 C29 1uF GNDA U4 GND DAC 18 C1 GNDA 10 14 VREGD Controller Board Connector GND 22 GNDA 15 VREGA GNDA C4 Rout Lout U1 R5 R17 68 C28: Assembly 0R resistor for DC coupling MICRO_OUT R3 100K GNDA GND C14 2n2 820 820 R4 GND C10 2n2 Microphone 11 12 1uF GND 0R/22nF C28 GNDA 16 19 GND GNDD 1 E-PAD VCCA 4 20 Vcc 15 C1 C12 R9 10K GND 220n C13 GND C24 1uF GND 100nF 100nF C22 R13 10K C25 100nF 5V0 150k R16 150k R14 STBY R STBY L RIN - RIN + G1 G0 LIN - LIN + Select Gain Select Gain Control Standby GND GND 5V0 C6 1uF IN- IN+ STBY GND 150K 150K Internal Bias Oscillator PWM STEVAL-CCA021V1 TS4657 Audio Card ST: TS4962IQT 4 3 1 300K 5V0 C7 100nF 5V0 5V0 GND GND 5V0 GND PWM Oscillator PWM Mono Class D Amplifier Channel Standby 8 7 19 20 1 GND R10 10K STBY_R SPK_STBY C21 17 16 Gain Control G0 15 R2 10K GND STBY_L GND GND 220n C15 GND G1 R1 10K GND 220n C11 220n GND J3 RCA WBTOR 1 GND GND J1 RCA WBTOR 1 C5 1uF 18 VCCD STBY 20 14 C2 PGND 4 GNDD 17 9 AV CC NC 21 3 AGND 13 PV CC PGND 12 6 OUTPUT H BRIDGE VCCA Bridge H Bridge H OUT- OUT+ 8 5 U3 ROUT- ROUT+ LOUT- LOUT+ L5 L6 C33 100pF GND Speaker BLM18EG221SN1 100pF C32 GND C31 100pF Terminal Block 2 1 P3 J4 Lumberg 1503 06 Mono Jack GND 100pF C30 GND External Speakers BLM18EG221SN1 L4 Terminal Block 1 2 P2 100pF C8 C9 100pF GND BLM18EG221SN1 L3 BLM18EG221SN1 L2 BLM18EG221SN1 L1 BLM18EG221SN1 11 14 5 2 U2 ST: TS2012IQT Stereo Class D Amplifier E-PAD PV CC 2 7 GNDA 21 9 E-PAD Doc ID 16318 Rev 1 KSSG1708 U6 2 1 Figure 2. 21 STEVAL-CCA021V1 Schematic diagrams Schematic circuit of the TS4657-based audio board 3/5 Revision history 2 STEVAL-CCA021V1 Revision history Table 1. 4/5 Document revision history Date Revision 29-Sep-2009 1 Changes Initial release. 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