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AOP single-wire IC with advance function mode

1-wire RGB · American Opto Plus LED · aop

Channels
RGB
Bits / channel
8
Supply
3.3–5.5 V
PWM
—
Backup data
no
Packages
1

AOP’s IC that exposes a command mode on the same wire. Not compared to any other maker’s IC; the sheet names none.

Refresh & flicker

24 bit per pixel in G, R, B order, MSB first. The sheet adds an ‘advance function mode’ in which the MCU starts with a specific command: it can read back the number of cascaded LEDs and the maximum sink current of R/G/B, set the current gain in 32 levels (5 bits) and choose the PWM refresh rate (1.5 / 2.5 / 5 / 10 kHz). The command format is not printed. Supply 3.3 V min / 5 V typ / 5.5 V max, 12 mA per channel, DIN high 2.7 V min, low 1.0 V max.

Timing

AOP single-wire IC with advance function mode bit timingAOP single-wire IC with advance function mode bit timing: a zero bit is 300 nanoseconds high then 900 low; a one bit is 900 high then 300 low; tolerance plus or minus 150 nanoseconds; reset 250 microseconds low1 · Bit encoding, to scaleDINhighlowbit 0 period 1200 nsbit 1 period 1200 nsT0H 300 ±150 nsT1H 900 ±150 nsT0L 900 ±150 nsT1L 300 ±150 ns"0" bit"1" bit020040060080010001200140016001800200022002400time, ns± tolerance on each falling edge2 · One frame: 24 bits, most-significant bit firstDIN170110010007100110101700101100bitch 1 · 8 bitsch 2 · 8 bitsch 3 · 8 bitsChannel order not recorded for this protocol · frame = 24 × ~1200 ns ≈ 28.8 µs · example data, first bits 1 0 1 …3 · RESET / latchlast bits of frame 1first bits of frame 2LEDs latch the data they receivedRESET: DIN low ≥ 250 µs (not to scale)4 · Cascade: each DOUT feeds the next DINMCULED 1DINDOUTLED 2DINDOUTLED NDINDOUTLED 1 keeps the first 24 bits, re-shapes the signal and sends the rest out on DOUT;LED 2 keeps the next 24, and so on. The last LED's DOUT is left unconnected.
T0H 300 / T0L 900 · T1H 900 / T1L 300 ns · ±150 ns · period 1200 ns · reset 250 µs source: datasheet
SourceT0HT0LT1HT1LPeriodRateReset±
datasheet ↗ 300 ns 900 ns 900 ns 300 ns 1200 ns 833 kHz 250 µs 150 ns
Typical 0.3 / 0.9 / 0.9 / 0.3 us with an allowance of +/-0.15 us, reset >=250 us (a minimum).

Library support

Not checked against FastLED, Adafruit or WLED source.

Parts using this protocol

Dating evidence

Evidence, not a release date. A library commit proves the part existed by that date and says nothing about how long before.

  • 2020-01-21 datasheet revision American Opto Plus L993L-LEPGBC-3I data sheet, 'Version 1.1 Date: 1/21/2020' ↗ day