Search found 1456 matches

by pasi
Wed 2018-05-16 10:25
Forum: VS1005 and VSOS Software
Topic: Using Analog pin for battery voltage detection
Replies: 8
Views: 110

Re: Using Analog pin for battery voltage detection

3.6V is the maximum rating for the silicon process.

Also, if a voltage on the analog pin is above the AVDD voltage (or below AGND), current starts to flow through the protection diodes to try to protect the IC.

Measuring 4.2V would need a voltage divider.
by pasi
Tue 2018-05-15 16:04
Forum: VS1005 and VSOS Software
Topic: UART connection VS1005 Breakout Board and pc
Replies: 2
Views: 34

Re: UART connection VS1005 Breakout Board and pc

The important difference being RS232 = +-12V, UART = 3.3V/0V. There are two versions from FTDI et.al, you will need the latter logic-level version.
by pasi
Tue 2018-05-15 11:09
Forum: DSP and Audio Software
Topic: Use the vs1053b chip as microphone input to read external sound intensity in DB.
Replies: 1
Views: 176

Re: Use the vs1053b chip as microphone input to read external sound intensity in DB.

You can read instantaneous values using the SCI registers to enable the ADC and then reading values asynchronously: http://www.vsdsp-forum.com/phpbb/viewtopic.php?t=29 Note: due to a hardware bug you can disable / enable the ADC only once after each hardware reset or the ADC channels may be swapped....
by pasi
Mon 2018-05-14 9:46
Forum: Microcontroller Software
Topic: Not connected pins
Replies: 3
Views: 61

Re: Not connected pins

What's the IC?

In vs1053/vs1063 LQFP-48 pin 35 is digital(IO) ground.
by pasi
Mon 2018-05-14 9:41
Forum: Microcontroller Software
Topic: Ogg-Vorbis audio file duration
Replies: 1
Views: 28

Re: Ogg-Vorbis audio file duration

You would need to determine the size with your controller. You would: 1. determine the sample rate from the headers 2. seek to the end of the file, and locate the last Ogg Vorbis header (usually in the last 8kB of file) and get the sample number (granule position) 3. calculate the duration from the ...
by pasi
Tue 2018-05-08 15:41
Forum: VS1010 Forum
Topic: VS1010C
Replies: 2
Views: 51

Re: VS1010C

A good question. The capacitors of XTAL and XTAL_RTC should use DGND. I think AGND got used for XTAL_RTC mainly for drawing reasons, because the XTAL_RTC pins are on the "analog side" of the chip. And then XTAL pins just followed that. Both grounds should be connected together under the VS1010, so d...
by pasi
Sat 2018-05-05 13:16
Forum: Stand-Alone Applications
Topic: bug in VSIDE Solution VS1063 player/recorder2016 version
Replies: 9
Views: 737

Re: bug in VSIDE Solution VS1063 player/recorder2016 version

We released a new version of the vs1063a standalone player / recorder VSIDE solution a few days back. Now the SCI control is possible in the recorder and SCI control is always possible. You can also control both the player and player/recorder using UART (with UART_BUFFERED enabled). See http://www.v...
by pasi
Sat 2018-05-05 13:13
Forum: Stand-Alone Applications
Topic: player1003but.bin ?
Replies: 8
Views: 469

Re: player1003but.bin ?

SPI EEPROM of SPI FLASH of the required size to hold the standalone player application would do. In the case of vs1003, 8kB SPI EEPROM should be enough. After the standalone player application has been loaded, it talks with a uSD/SD/MMC card in SPI mode. The card is connected to mostly the same pins...
by pasi
Fri 2018-05-04 17:13
Forum: VS1010 Forum
Topic: How to make programmed "Reboot #"
Replies: 6
Views: 152

Re: How to make programmed "Reboot #"

Edit: Not specific to VS1010. 1. If you're lucky and the ROM code doesn't assume a lot of peripheral states - configure the GPIO pins as outputs and set to the appropriate state, then jump at the start of the ROM at 0x8000 ((void (*)(void))(0x8000))(); You can increase your luck by turning off peri...
by pasi
Thu 2018-05-03 13:49
Forum: System Software
Topic: Turn off the 5.6s power off feature VS1005
Replies: 10
Views: 1529

Re: Turn off the 5.6s power off feature VS1005

All IO pins have a protection diode to the corresponding voltage, so if any of the IO pins get voltage from an external device, you will see that voltage minus ~0.6V in IOVDD, maybe less if there is series resistance in the path. About Power Off: Certain combinations of residual voltages in IOVDD an...