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Update 'Hardware info'

Triss 2021-06-26 18:12:44 +00:00
parent b13a510ec8
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Hardware-info.md

@ -7,13 +7,13 @@ The SQ50 consists of the following components:
* MicroUSB-connector (to the host computer)
* 5-pin 2.54mm pin header, for probe IO
* Xilinx Spartan XC3S50AN TQG144AGQ1917 D5886160A 4C (QFP-144) ([datasheet with pinout](https://www.xilinx.com/support/documentation/data_sheets/ds557.pdf), [internal flash memory docs](https://www.xilinx.com/support/documentation/user_guides/ug333.pdf))
* ISSI IS61WV25616EDBLL-10TLI EAB217P5 1950 (RAM used for storing samples)
* ISSI IS61WV25616EDBLL-10TLI EAB217P5 1950 (TSOP-44, [datasheet](https://www.issi.com/WW/pdf/61-64WV25616EDBLL.pdf)) (SRAM used for storing samples)
* FTDI HWJFS.00 FT240XQ 1741-D (USB interface) ([product info](https://ftdichip.com/products/ft240xq/), [datasheet](https://ftdichip.com/wp-content/uploads/2020/08/DS_FT240X.pdf), [proprietary drivers used by ScanaStudio](https://www.ftdichip.com/Drivers/D2XX/Linux/libftd2xx-x86_64-1.4.8.gz))
* TI OPA 4354A 912Q (quad opamp, [product info](https://www.ti.com/product/OPA4354))
* A number of analog components
* Bottom side:
* 8-pin 2mm pin header/connector (JTAG)
* 3 empty slots/solder pads for more ISSI chips (probably used in the SQ100/SQ200 variants)
* 3 empty slots/solder pads for more ISSI SRAM chips (probably used in the SQ100/SQ200 variants)
* Empty solder pads for a SOIC-8 chip for unknown purpose
* 147776 TP949 6EAL (QFN-16, unknown purpose)
* A crystal oscillator, frequency/markings are impossibly tiny to read
@ -58,4 +58,17 @@ bottom side, jtag conn
7. GND
8. VCC
Perhaps the two 'nc' pins go to a different device.
Perhaps the two 'nc' pins go to a different device.
### Upgrading your device
When using a custom driver (and not ScanaStudio), my SQ50 seems to happily sample at 200 MHz when specified in the settings, even though it is not marketed to be able to do this.
However, unlike the SQ200, it has much less SRAM for storing samples. This can probably be fixed by populating the 3 empty pads intended for ISSI chips. This has not been tested yet, though.
You can get these ISSI SRAM chips here:
* [Arrow](https://www.arrow.com/en/products/is61wv25616edbll-10tli/integrated-silicon-solution-inc?q=IS61WV25616EDBLL-10TLI)
* [Digikey](https://www.digikey.com/en/products/detail/issi-integrated-silicon-solution-inc/IS61WV25616EDBLL-10TLI/2799144)
* [Farnell/Newark](https://www.newark.com/integrated-silicon-solution-issi/is61wv25616edbll-10tli/sram-4mbit-10ns-tsop-ii-44/dp/65T1338)
* [Mouser](https://eu.mouser.com/ProductDetail/ISSI/IS61WV25616EDBLL-10TLI?qs=DfG0HhEx1UX%2F12WoHJaVrQ%3D%3D)
* [RS Components](https://americas.rsdelivers.com/product/issi/is61wv25616bll-10tli/issi-sram-is61wv25616bll-10tli-4mbit/8115181)