Taiwan Xinchuang SSS1700 latest version Chinese manual | SSS1700 latest version Chinese specification | SSS1700datasheet Chinese explanation

                                                          Taiwan Xinchuang SSS1700 latest version Chinese manual | SSS1700 latest version Chinese specification | SSS1700 datasheet Chinese explanation

 

            SSS1700 is a new USB audio control chip launched by Taiwan Xinchuang SSS following SSS1629/SSS1630. Compared with SSS1629 and SSS1630, SSS1700 has the following advantages:
1. The entire USB audio design circuit has no capacitor output, and the chip has a built-in 12MHz crystal oscillator, which reduces peripheral components, reduces the BOM cost of the entire solution, and the board frame size can be made smaller.
2. The sound quality of the SSS1700 chip has been greatly improved. It supports 96 KHz 24-bit sampling rate and external audio codec (24-bit/96 KHz I2S input and output). Compared with SSS1629, it only supports 48HZ 16-bit sampling rate. The user provides a better listening experience.
3. The overall noise floor of the SSS1700 chip is greatly reduced, and the average noise floor of the chip is about 60DB.
4. SSS1700 supports 3.5MMM 4-segment automatic switching between American and British standards, which broadens the applicable scenarios and reduces the switching circuit in the design process.
5. SSS1700 supports Mciro USB, Type-C 3.1 interface, lightning interface, which can realize the functions of earphone and microphone. Support call, answer and hang up the phone, volume increase and decrease functions.
1. SSS1700 chip product features :

Compliant with USB specification v2.0 running at full speed

 

Compliant with USB Audio Device Class Specification v1.0

 

Support 44.1KHz/48KHz/96KHz, 16-bit/24-bit sampling rate (EEProm option)

 

Embedded digital mixer, the mixer is muted by default after booting (operating system control)

 

When setting a single ADC, both DAC channels are mixed with the single ADC data

 

When setting stereo ADC, L-ch DAC and L-ch ADC data are mixed, R-ch DAC and R-ch ADC data are mixed

 

ROM option for power mode setting (USB bus power 100mA: default or 500mA configuration)

 

By default, 16 and 24 bits, ADC and DAC with 48KHz sampling rate are supported

 

Embedded headphone driver, up to 16 ohm load driver

 

ADC line input to DAC output data path option

 

Embedded I2S interface (master/slave mode) for 16/24-bit codec DAC/ADC (EEPROM option)

 

Embedded SPDIF input and output interface for 16/24-bit codec DAC/ADC (EEPROM option)

 

Embedded crystal-less on-chip oscillator

 

Support USB suspend/resume mode

 

Embedded USB transceiver for USB interface

For the headphone function, the USB audio function topology has 2 input terminals, 2 output terminals, (1 mixer unit), (1 selector unit) and (3) functional unit (some units can be enabled by ROM code option) )

 

Support one control endpoint, one synchronous output endpoint, one synchronous input endpoint, one interrupt input endpoint (HID uses interrupt input and control output)

 

Alternate zero bandwidth setting, used to release the playback bandwidth on the USB bus when the device is inactive

 

Volume up, volume down, play mute, record mute, next track, previous track, stop and play/pause pins for direct user control

 

Volume up, volume down, play mute, next track, previous track, stop and play/pause support

 

Two-wire serial bus (I2C bus) is used for external MCU control. The entire EEPROM space can be accessed by MCU

 

USB HID for host control synchronization

 

External serial EEPROM (24C02~24C16) interface for customer-specific USB video, PID, product string, serial number, default gain, default EQ setting, playback/record enablement and other options

 

EEPROM write function can provide convenience for mass production through HID or the specific requirements of the supplier

 

Pre-loaded VID, PID and product string and design options for setting priority: i) External EEPROM ii) Embedded ROM

 

Customer specific requests and new virtual registers (10XX\u 10XX; where XX can be set by register write-back and read-back for verification) for software protection

 

GPIO and MCU interface register read/write via HID

 

A true headphone amplifier solution

 

Support CTIA/OMTP automatic switching TRRS audio jack (EEPROM option)

 

Support AD key detection (EEPROM option)

 

Support RGB LED (EEPROM option)

 

Support HID keyboard (EEPROM option)

 

Support IIC initial external codec (EEPROM option)

 

Embedded 1.2V POR

 

Embedded 5V to 3.3V (250mA capacity) and 3.3V to 1.2V regulators 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

 

2. SSS1700 electrical parameters and parameter setting methods

1. Absolute maximum ratings

 

2. DC characteristics

 

3. AC characteristics

Headphone output

 

Microphone input characteristics

 

4. Pin description

 

48-pin LQFP/QFN pin output diagram

 

36-pin QFN pin output diagram

 

 

Pin list table

 

Play, record and function options

 

 

Insert path selection function option

 

 

5. Block diagram and description

 

The default setting of the line in USB mode

 

 

6. Automatic gain control (AGC)

 

SSS1700 has AGC (Automatic Gain Control) function. It can automatically adjust the output range of the ADC to keep the output of the ADC in a stable range. The AGC control principle diagram is as follows, the adjustable range of gain is -23dB~+40dB, and each level is adjustable by 1dB.

 

 

The AGC parameter setting can be set in EEPROM. Control characteristics include time stability, error range, active mode, hold time, speed adjustment, etc. These parameters need to be set separately. The operation diagram is as follows:

 

 

 

The goal of AGC tuning is within the two blue lines. As shown in the figure before, if the signal is lower than the blue line interval, the AGC amplifier will adjust the signal to the blue line range. Similarly, in the figure, the signal exceeds the blue interval, and then AGC reduces the signal to the blue range.

 

7. Multi-function buttons (4 keys)

 

SSS1700 supports up to 4 multi-function keys. Through the EEPROM setting, each multi-function key can have up to four different button operation modes. The four different button operations are "short press", "two short presses in a row", "short press and long press" and "long press".

 

Each multi-function button corresponds to a different control mode to meet different functional requirements, so as to achieve the purpose of streamlining the number of buttons. The setting diagram is as follows:

 

Key input can be set from the following locations: Function output can be assigned to:

 

8. LED lighting effect function

 

SSS1700 has a stereo audio waveform gradient indicator function. Through EEPROM settings, it can provide up to six indicator signals (the difference between L/R, and share three indicator signals for each channel). The indicator signal can be connected to the LED as an audio output gradient indicator. When the audio signal is zero, the LED can be set as a breathing light to increase product diversity.

 

The following is a functional diagram: 

 

When setting the audio output indicator, it can be adjusted according to the required output range; each indicator signal can have 16 levels for recommended audio settings.

 

9. Five-band equalizer

 

SSS1700 builds an equalization function of 5 frequency bands on the playback path, which provides users with sound adjustments. These frequencies of the five-band equalizer are fixed at 60Hz, 300Hz, 1.2KHz, 3.6KHz, and 12KHz, respectively. The gain of each frequency band can be set to +12dB~-∞dB, as shown below:

 

 

Users can adjust a variety of sound effects according to their needs. The adjusted sound effects are stored in EEPROM, and different sound effects can be changed in a loop mode with a single button. At the same time, a single LED indicator switch sound effect is provided. By default, SSS1700 has a built-in subwoofer sound setting, therefore, without external EEPROM, there is still an EQ sound conversion for users to use. The preset bass (subwoofer) sound settings are as follows:

 

 

10. Typical application circuit of LQFP48 (U6C)/QFN (Q6C)

 

 

11.QFN36 (QCC) typical application circuit

 

Three, packaging information

 

LQFP 48 

  

 

QFN48

 

 

 

  QFN36