Taiwan SSS Xinchuang sss1700 replaces cmmedia cm6533 24bit 96KHz USB audio codec chip

Taiwan Xinchuang is 2021 A chip was introduced in SSS1700 Can replace compatible CM6533, It is superior to Cmedia CM6533, And SSS1700 The peripheral circuit is simple and easy to design , Chip cost ratio Cmedia CM6533 Be low , The overall scheme price is relatively high Cmedia CM6533 It also has more advantages .

Here are the details Cmedia CM6533 And SSS1700 Parameter properties ：

Cmedia CM6533 Is a USB Audio codec , Embedded inside 8051 kernel , For headset , Mobile entertainment devices plug in mobile speakers （docking）,USB Loudspeaker box ,USB Microphone and other applications . Through the interior 8051 Can develop a variety of applications , For example, Microsoft voice phone （micro lync）, Apple Android product plug-in mobile speaker .

Cmedia CM6533 characteristic ：

USB Interface

accord with USB 2.0 Full speed （12 Mbps） Equipment standards

accord with USB Audio equipment standards v1.0 edition

accord with USB Human computer interaction equipment standard v1.1

Embedded audio encoder

16-bit 2 channel ADC, Can be realized 83dB Signal-to-noise ratio

8/11.025/16/22.05/32/44.1/48（kHz） Sampling rate

16-bit 2 channel DAC, Can be realized 93dB Signal-to-noise ratio

8/11.025/16/22.05/32/44.1/48（kHz） Sampling rate -16 Bit adoption 44.1k/48k Output S/PDIF Interface

IIC The interface can be connected to the outside EEPROM- Support automatic gain control （AGC ）

Support USB Pause 、 return 、 Reset

Support USB Transmission type control 、 interrupt 、 block 、 Synchronous data

14 individual IO The port can be configured as a key or LED Indicator light , Firmware programmable IO Mouth function

3.3v/5v 9 individual IO The port supports an internal pull-down resistor ,5 Supports internal pull-up resistors

LQFP48 encapsulation

The headset is configured in four pin modes 、 Microphone 、 Socket speaker 、 Microphone （MODE_0,MODE_1）.

One 12M Crystal oscillator , Internal PLL （PLL）

Single 5v Power supply （1.8v-5v kernel ,5v-3.3vIO Numbers IO mouth ,5v-3.3v Analog de coder ）

SSS1700 characteristic ：

     SSS1700 yes 3S Highly integrated monolithic USB Audio controller , With on-chip oscillator , Save external... For headphone applications 12MHz Crystal assembly .SSS1700 Function support 96 KHz 24 Bit sampling rate and external audio codec （24 position /96 KHz I2S Input and output ）, And has built-in stereo 16/24 position ADC、 stereo 16/24 position DAC、 Headset driver 、 Five band hardware EQ、, Audio PLL ,USB Clock oscillator , and USB FS Controller plus physical layer . external 24C02~24C16 EEPROM Connect as USB VID/PID/ Product string 、 Default gain settings and other customization requirements provide flexibility .SSS1700 by Windows/MAC/Android Features in the operating system USB The audio solution provides the lowest BOM Solution .

accord with USB standard v2.0 Run at full speed

accord with USB Audio equipment class specification v1.0

Support 44.1KHz/48KHz/96KHz、16 position /24 Bit sampling rate （EEPROM Option ）

Embedded digital mixer , After power on, the default mixer is silent （ Operating system control ）

When setting sheet ADC when , Two DAC All channels are related to the order ADC Data mixing

When setting stereo ADC when ,L-ch DAC And L-ch ADC Data mixing ,R-ch DAC And R-ch ADC Data mixing

Power mode setting ROM Options （USB Bus power supply 100mA： Default or 500mA To configure ）

The default support 16 and 24 position ,48KHz Sampling rate ADC and DAC

Embedded earphone driver , the height is 16 Ohmic load drive

ADC Line input to DAC Output data path options

be used for 16/24 Bit codec DAC/ADC（EEPROM Option ） Embedded in I2S Interface （ Lord / Slave mode ）

be used for 16/24 Bit codec DAC/ADC（EEPROM Option ） Embedded in SPDIF I / O interface

Embedded crystal free on-chip oscillator

Support USB Hang up / Recovery mode

be used for USB Embedded interface USB Transceiver

For Headphone Function ,USB The audio function topology has 2 Two input terminals ,2 Two output terminals ,（1 A mixer unit ）,（1 A selector unit ） and （3） Functional units （ Some units can be through ROM Code options enable ）

Support a control endpoint 、 A synchronous output endpoint 、 A synchronous input endpoint 、 An interrupt input endpoint （HID Use interrupt input and control output ）

Standby zero bandwidth setting , Used to release when the device is inactive USB Playback bandwidth on the bus

The volume goes up 、 volume down 、 Play mute 、 Recording mute 、 Next track 、 Previous track 、 Stop and play / Pause pin , For users to directly control

The volume goes up 、 volume down 、 Play mute 、 Next track 、 Previous track 、 Stop and play / Suspend support

Two wire serial bus （I2C Bus ） For external use MCU Control the whole EEPROM Space can pass through MCU visit

For host control synchronization USB HID

External serial port EEPROM（24C02~24C16） Interface , For customer specific USB video 、PID、 Product string 、 Serial number 、 Default gain 、 Default EQ Set up 、 Play / Logging enabled and other options

EEPROM The write function passes HID Or the specific requirements of the supplier , Provide convenience for mass production

Preloaded VID、PID And product strings and design options to set priorities ：i） external EEPROM ii） The embedded ROM

Customer specific requests and new virtual registers （10XX\u 10XX; among XX It can be set by register write back and read back , To verify ） For software protection

GPIO and MCU The interface register passes through HID read / Write

True headphone amplifier solution

Support CTIA/OMTP Automatic switch TRRS Audio jack （EEPROM Option ）

Support AD Key detection （EEPROM Options ）

Support RGB LED（EEPROM Option ）

Support HID keyboard （EEPROM Option ）

Support IIC Initial external codec （EEPROM Options ）

The embedded 1.2V POR

The embedded 5V to 3.3V（250mA Capacity ） and 3.3V to 1.2V Regulator , For a single external 5V Power Supply

Embedded rotary encoder interface for volume control （EEPROM Option ）

1.2V Digital core and audio PLL operation 、3.3V USB PLL Operation and ADC/DAC operation

compatible Win XP、Win 7、Win 10、Mac OS、Linux OS and Android OS, No additional driver required

Cmedia CM6533 And SSS1700 Design schematic diagram comparison ：

Cmedia CM6533 Design structure block diagram ：

  SSS1700 Design structure block diagram ：

 SSS1700 Pin configuration ：

 

To sum up, we can see : CM6533 And SSS1700 Consistent package size , It does not affect the size of the designed product , And SSS1700 No capacitance USB Sound card chip , The chip has a built-in crystal oscillator , real Amorphous oscillator USB Audio chip ,USB Headphone chip .

SSS1700 Design USB The headset 、USB Microphone 、USB horn 、USB Sound, etc USB Audio decoding scheme , Drive free and compatible  Win XP、Win 7、Win 10、Mac OS、Linux OS and Android OS And so on , It's standard USB Audio chip , Yes USB Association certified chip .

SSS1700 Design the above products DEMOBOARD The plate is as follows ：

in addition SSS1700 Can support multi-functional composite keys and free combination , Most support 4 Multiple function keys . adopt EEPROM Set up , Each multifunction key can have up to four different button operation modes . The four different button operations are “ Short press ”、“ Short press... Twice in a row ”、“ Short press and long press ” and “ Long press ”.

Each multifunction key corresponds to a different control mode , To meet different functional requirements , So as to achieve the purpose of simplifying the number of keys .SSS1700 You can customize PID、VID, It is convenient for users to identify more quickly USB Sound card equipment .