Filled in some info about my chip and started summarizing its larger components/SoC/ICs. Started with the chip doing most of the computations, ble and audio converting csr8670 from qualcomm

README.md

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 # hackable-ble-audio
 Project to research, find and create a hackable platform for smart audio connectivity and seamless transmission between receiving and transmitting devices on same channel
+
+
+## Idea
+Keypoints: 
+looked at what my ble trans/receiver had in its guts in [this video](./resources/pinout.m4v). 
+The main chips I see are:
+ - csr8670 - Bluetooth Audio SoC [more info](#csr8670)
+ - sgm3717 - 4Ω, 400MHz Bandwidth, Dual, SPDT Negative Signal Handling Analog Switch [more info](#sgm3717)
+ - p8908 - 25mW TRUE CAP FREE STEREO HEADPHONE AMPLIFIER [more info](#p8908) 
+
+
+
+# csr8670
+
+The csr8670 is a SoC with BLE, embedded flash for receiving and outputing audio signals.
+
+
+Important note is that the csr8670 in my device has a newer version, the 8675.  
+In a product newsletter from Shenzhen Feasycom has a overviewed comparison between the old and new models [0].
+
+csr8670 | csr8675 | notes
+-- | -- | --
+BT4.0 | BT4.1 | OS upgrade to BT 5.0
+80 Mhz RISC MCU and 80 MIPS Kalimba DSP
+16-bit audio | 24-bit audio | 
+8-96kHz | 8-192kHz | Supported sample rates
+16Mb Flash | 16Mb Flash | External 64Mb SPI Flash
+Stereo codec and 2 path MIC | Stereo codec and 2 path MIC |
+1 x I²S/PCM | 2 x I²S/PCM | Meet the needs of multiple digital audio interfaces
+SPDIF (blocks  I²S/PCM's) | SPDIF (non-blocking I²S/PCM)
+UART, USB2.0 full-speed, I²C | UART, USB2.0 full-speed, I²C & SPI | Serial interfaces
+ | Master and slave bit-serialiser (I²C and  SPI) | 
+6 capacitive touch sensor inputs
+Battery charger
+3 LED and LCD segment driver
+29 PIO ports | 32 PIO ports | Up to w/ BGA package
+
+
+## Documetation & references
+ - Product Page [qualcomm.com](https://www.qualcomm.com/products/csr8670) [pdf](./resources/csr8670/CSR8670%20%7C%20Qualcomm%20Productbrief.pdf)
+ - Product Brief [qualcomm.com](https://www.qualcomm.com/media/documents/files/csr8670-product-brief.pdf) [pdf](./resources/csr8670/CSR8670%20%7C%20Qualcomm%20Productpage.pdf)
+ - Digikey product page [digikey](https://www.digikey.com/catalog/en/partgroup/csr8670/28987) [pdf](./resources/csr8670/CSR8670%20-%20Qualcomm%20-%20Integrated%20Circuits%20%28ICs%29%20%7C%20Online%20Catalog%20%7C%20DigiKey%20Electronics.pdf)
+ - [0] CSR8670 vs CSR8675 [feasy.com](http://www.feasycom.net/news/difference-between-csr8670-and-csr-15721421.html) [pdf](./resources/csr8670/CSR8670%20vs%20CSR8675%20-%20Product%20News%20-%20Shenzhen%20Feasycom%20Technology%20Co.%2CLtd%20%7C%20feasycom.net)
+
+
+## Sources
+
+TODO: 
+Chip maker, info and important takeaways.  
+Pros and cons.  
+
+