New USB audio chip DP108T substitute CM108, can be use for Allstar?

App_rpt-users
2

I am not a programmer but I do not think you can use that chip as it does not have any GPIO pins to use for PTT or COS.

Can you get any audio out of it with a set of speakers using app_rpt?

Marshall - ke6pcv

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From: Iulian via AllStarLink Discussion Groups [mailto:noreply@community.allstarlink.org]
Sent: Wednesday, August 12, 2020 4:04 AM
To: ke6pcv@cal-net.org
Subject: [AllStarLink Discussion Groups] [App_rpt-users] New USB audio chip DP108T substitute CM108, can be use for Allstar?





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iuliandj
August 12

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Hello,
Receltly i bought Logilink ua0053 usb sound card to modify for allstar link.
When I open the case, I found that the chipset is not CM108, even if in raspbberry pi lsusb command says that is CM108 C media chipset, is DP108 T with 2x12 pins.
The pin out is :

image

image

Schematic:

image

Device:
image
Specifications:
DP108T Highly integrated USB5.1 audio I/O controller
Overview
1.
DP108T is a highly integrated USB/YTPE-C audio chip. All necessary analog modules are embedded, including dual DAC and audio driver, microphone gainer, PLL, voltage regulator and USB transceiver. In addition, the audio volume can be easily adjusted through a dedicated HID compatible volume control pin.
2. Features
※Support
USB2.0 ; TYPE-C; ※Comply with USB auditory device specification version 3.0;
※Support USB pause/resume mode and remote wake-up function of volume control pin;
※Speaker mode (only playback function) or an earphone mode (playback and recording functions) has jumper pins (jumper pIN);
※ headset mode, USB audio function topology (USB audio function topology) has two input terminals
promoter, the two output terminals, a mix Unit, a selection unit and 3 feature function units;
※In earphone mode, turn on/off the mixer unit through jumper pin;
※Support one control terminal, one synchronous output terminal, one synchronous input terminal and one interrupt terminal.
※When the device is paused, the Releasing Playback Bandwidth and the USB bus are alternately
set to zero bandwidth;
※Up, down, and mute playback pins support USB HID device groups, so the host can control synchronously; ※Mute The indicator pin uses LED to indicate the mute status;
※ Jumper Pin (3.5V or 2.5V) can be set for voltage output;
※ The earpiece amplifier is an embedded high-performance 16-bit audio DAC;
※ The microphone gainer input It is a 16-bit embedded ADC;
※Embedded Power-On-Reset module;
※Embedded 5V-3. 3V regulator supports single external 5V operation;
※Drive-free compatible with Win98 SE/ Win ME/ Win2000/ Win XP/ Mac OS9 / OS X;
※24-pin SSOP package.
The second real picture is designed with an upgraded version of DP108T. It can be seen from the picture that the board designed by DP108T is more concise and the development difficulty is also less.
The biggest difference between the two is:

  1. DP108T has no EEPROM external interface, which means PID And VID cannot be modified
  2. The software using C-MEDIA is very likely to be unusable. But as long as the C-MEDIA software is cracked, PID and VID are implanted in the initialization.
  3. DP108T needs more filter circuit (filter capacitor)
  4. DP108T does not need to use crystal oscillator (internal integration)
  5. Supports USB2.0 and 5.1 at the same time, supports TYPE-C interface
  6. Reduce development difficulty and development cost

I don’t see any GPIO pin.
Can I use this sound card for Allstar link with FOB modifications for PTT and COS like CM108 ? On wich pins?
Thank you !

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