NYX1-512

The NYX1-512 chip is a recording peripheral that can implement the Synapse Electrical Broadband node. It supports the following ElectricalBroadbandConfig parameters:

Parameter name	Parameter options
`bit_width`	12
`sample_rate`	4000, 8000, 16000, 20000, 25000, 32000
`low_cutoff_hz`	4, 57, 92, 154, 457 (defaults 92 if field is empty)
`high_cutoff_hz`	4365, 13489, 20400 (defaults 13489 if field is empty)
`channels`	valid `electrode_id` and `reference_id` depend on the desired reference mode.
	`id` is arbitrarily assigned
	`type` specifies `ELECTRODE` (default) or `GPIO`

Gain and Filter Parameters

The NYX1-512 chip has tunable filter parameters and gain settings. The value of the low- and high-frequency cutoffs determines the gain of the system. The table below details the valid pairs of filter cutoff values, as well the gain associated with each setting.

Low Cutoff (Hz)	High Cutoff (Hz)	Gain (V/V)
457	13489	138
154	13489	179
92	13489	200
57	13489	200
57	4365	200
4	20400	13

Reference Modes

Differential Reference Mode

You need to select pairs of electrodes according to the following rules:

electrode_id: Select a set of even numbered electrodes which fall between 0–511, inclusive.
reference_id: For a given electrode_id n, reference_id = n+1

Global Reference Mode

electrode_id: All even OR all odd values between 0–511, inclusive.
reference_id: Refer to the following table:

`electrode_id`	Valid `reference_id`
0–7	512
8–127	513
128–135	514
136–255	515
256–263	516
264–383	517
384–391	518
392–511	519

Ground Reference Mode

To use PCB ground as your reference signal:

electrode_id: All even OR all odd values between 0–511, inclusive.
reference_id: 520

LUX1-16K

The LUX1-16K chip is a stimulation peripheral that can implement the Synapse Optical Stimulation node. It drives an LED array of up to 128 × 128 pixels (16,384 total). It supports the following OpticalStimulationConfig parameters:

Parameter name	Parameter options
`peripheral_id`	ID of the LUX1-16K peripheral to drive
`pixel_mask`	Per-pixel enable list in row-major order. A value of `0` forces the corresponding pixel off; any non-zero value leaves it enabled. Leave empty to enable all pixels. When provided, its length must match the frame's `rows` × `columns`.
`bit_width`	7 (yields 128 intensity levels, 0–127)
`frame_rate`	Frame rate in Hz. Must be greater than 0.
`gain`	Intensity gain multiplier applied to the normalized pixel values
`send_receipts`	`true` or `false` (defaults to `false`). When `true`, the device returns a 1×N receipt vector (N = number of LEDs) with each frame.

Frame Format

An optical stimulation frame (OpticalStimFrame) describes a single image to display on the LED array. Each frame specifies:

Field	Description
`rows`	Frame height, in pixels
`columns`	Frame width, in pixels
`intensity`	Normalized pixel intensities in row-major order. Each value ranges from `0.0` (fully off) to `1.0` (fully on); values are scaled to the 0–127 range on the device.
`duration_us`	On-time, in microseconds. For passive displays this is the row on-time; for active displays it is the frame on-time.

SciFi Virtual Recording Peripheral

This recording peripheral generates test data for benchmarking and debugging SciFi headstages. It can implement the Electrical Broadband node. The peripheral will attempt to match the bit-rate requested by the supplied config parameters. It supports the following ElectricalBroadbandConfig parameters:

Parameter name	Parameter options
`bit_width`	12
`sample_rate`	0–10000
`gain`	Ignored
`low_cutoff_hz`	Ignored
`high_cutoff_hz`	Ignored
`channels`	`electrode_id` and `reference_id` are ignored. Test data will output the id of each configured channel at the requested sample rate

Peripherals