NJU26060 Demo Board SUMMARY SPECIFICATION

Transcription

1 SUMMARY NJU26060 Demo Board NJU26060 is a DSP suitable for audio with a sampling rate converter, two PWM modulators, a digital audio transmitter (DIT) and four GPIOs. The target program is stored in built-in OTP or external EEPROM. The inputs of this demo board provide with a stereo analog signal and digital signal. This board designs to drive 9-ohm speaker at up to 20W per channnel. According to need, this board is able to interface to external devices with the built-in DIT SPECIFICATION Table 1 shows specification of NJU26060 Demo Board. Input Name Board number Dimension Board category Power supply Digital Analog Digital NJU26060 Demo Board APC *105mm Double sided board DC19V Sampling frequency: 32KHz to 192KHz J6/J7: SHORT 2.0Vrms/Full scale J6/J7: OPEN 1.0Vrms/Full scale Sampling frequency: 48KHz Output Headphone (16ohm-load) 0dBFS@1KHz(no-clipped) 31mW Speaker BTL 8ohm 15W 10% 20W Operating temperature Room temperature Table 1 Board specification - 1 -

2 BLOCK DIAGRAM The block diagram of NJU26060 DEMO board is shown in the figure 1.Because of a built-in SRC, this DSP operates always in master mode. The digital audio signal outputted from DIR is converted to sampling frequency of 48KHz by SRC. The DSP uses this converted signal, executes signal processing and inputs PWM modulator. The PWM moderator-0 is amplified by TAS 5132 of TI driver and outputted to speakers. The signal of PWM moderator-1 converts to an analog signal by LPF. The converted analog signal is amplified by NJM2768 and outputted to headphone. The digital input is SDI0 and the analog input is SDI1.The ADC in this demo board is NJU3610. PC PC I/F USB U1 D3.3V RESET Reset IC NJU7706 MPU CY7C RESETb SCL SDA NJU bit DSP Core DATA RAM0 Program RAM DATA RAM1 OTP CLK CLKOUT GPIO0 GPIO1 GPIO2 GPIO MHz NJU26060 Demo Board EEPROM 24LC128 Jumper setting DVD Drive Digital input Analog input 2.6Vrms/Full scale J1 D3.3V A3.3V J3 A3.3V DIR CS8416 ADC NJU SDI LRI BCKI SDI1 LRO BCKO SRC DIT PWM Modurator0 SDO LP0 LN0 RP0 RN A12V A19V Driver TAS5132 LC LPF J4 TM1 TM2 Digital output Lch spaeker PWM mute 2 PWM_MUTEb Rch speaker Power Supply 19.0V VOL CUR PWM standby D3.3V 3 PWM_DISb PWM Modurator1 LP1 RP CR LPF ATT-3dB A5V Headphone Amp NJM2768 J2 Headphone DC19V J5 REG12V NJM2387 REG5V NJM7805 REG3.3V NJM2880 A3.3V D3.3V A19V A12V REG5V NJM2880 A5V Figure 1 Block Diagram USAGE of DEMO Board 1. According to execute DSP program, set to jumpers. (J8-J11) 2. Connect to devices. 3. Power on. 4. Execute a GUI

3 Jumper setting description Selection of DSP program J8 (GPIO0)=H: external EEPROM J8 (GPIO0)=L: built-in OTP This section shows an example used EEPROM. Symbol Name H L J8 GPIO0 EEPROM OTP J9 GPIO1 No use No use J10 GPIO2 EEPROM No use J11 GPIO3 EEPROM No use Jumper setting of J6/J7 Short: 2Vrms input/full scale Open: 1Vrms Input/Full scale Parts layout Figure 2 shows the parts layout of NJU26060 Demo Board. Digital output J8-J11 EEPROM for NJU26060 Lch PC I/F USB MPU CY7C64713 Reset Driver TAS5132 Rch NJU26060PWM standby DSP NJU26060 NJU26060PWM mute Headphone Amp NJM2768 ADC NJU3610 J6 J7 OP.Amp NJM2747 DIR CS8416 Digital input Analog input Headphone output DC19V Figure 2 Parts layout - 3 -

4 Figure 3 NJU26060 Demo Board (APC-005-1)(1/8) TOP block - 4 -

5 Figure 4 NJU26060 Demo Board (APC-005-1)(2/8) MPU block - 5 -

6 Figure 5 NJU26060 Demo Board (APC-005-1)(3/8) DIR block - 6 -

7 Figure 6 NJU26060 Demo Board (APC-005-1)(4/8) ADC block - 7 -

8 Figure 7 NJU26060 Demo Board (APC-005-1)(5/8) NJU26060 block - 8 -

9 Figure 8 NJU26060 Demo Board (APC-005-1)(6/8) Driver block - 9 -

10 Figure 9 NJU26060 Demo Board (APC-005-1)(7/8) Headphone block

11 Figure 10 NJU26060 Demo Board (APC-005-1)(8/8) Power block

12 Figure 11 NJU26060 Demo Board (APC-005-1) component side silk

13 Figure 12 NJU26060 Demo Board (APC-005-1) Backside silk

14 Figure 13 NJU26060 Demo Board (APC-005-1) component side pattern

15 Figure 14 NJU26060 Demo Board (APC-005-1) backside pattern

16 MEMO [CAUTION] The specifications on this databook are only given for information, without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights