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AOP single-wire IC (high speed mode, 280 us reset)

1-wire RGB · American Opto Plus LED · aop

Channels
RGB
Bits / channel
8
Supply
3.3–5.5 V
PWM
—
Backup data
no
Packages
2

AOP’s second IC: the L993L-QEPGBC-3I and L381L-LEPGB3DI6 share this table (the L381L sheet is marked ‘TENTATIVE’, 2020-08-18). It lacks the advance mode of aop-adv and uses a 280 us reset instead of 250 us.

Refresh & flicker

24 bit per pixel in G, R, B order, MSB first (figure ‘SINGLE DATA IN 24BIT FOR RGB’). 12 mA per channel, VDD 3.3-5.5 V on the L993L-QEPGBC (3.7-5.3 V on the L381L), DIN high 2.7 V min, low 1.0 V max (0.7 V on the L381L).

Timing

AOP single-wire IC (high speed mode, 280 us reset) bit timingAOP single-wire IC (high speed mode, 280 us reset) bit timing: a zero bit is 300 nanoseconds high then 790 low; a one bit is 790 high then 610 low; reset 280 microseconds low1 · Bit encoding, to scaleDINhighlowbit 0 period 1090 nsbit 1 period 1400 nsT0H 300 nsT1H 790 nsT0L 790 nsT1L 610 ns"0" bit"1" bit0250500750100012501500175020002250time, nsDatasheet lists unequal bit periods (1090 vs 1400 ns); each bit is drawn with its own.2 · 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 × ~1400 ns ≈ 33.6 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 ≥ 280 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 790 · T1H 790 / T1L 610 ns · reset 280 µs source: datasheet
SourceT0HT0LT1HT1LPeriodRateReset±
datasheet ↗ 300 ns 790 ns 790 ns 610 ns 1200 ns 833 kHz 280 µs —
Windows (min-max): T0H 0.22-0.38 us, T0L 0.58-1.0 us, T1H 0.58-1.0 us, T1L 0.22-1.0 us, reset >=280 us, ‘TH+TL>1.2 us’. The values here are the window midpoints: 300 / 790 / 790 / 610 ns (T0L and T1H at 0.79 us, T1L at 0.61 us).

Clones & compatibility

“Compatible” is never stated bare here — each relationship carries how strong the claim is, and what bites if you assume too much.

  • protocol compatible WS2812B-V5

    T0H 220-380 ns, T0L 580-1000 ns, T1H 580-1000 ns and a 280 us reset are the windows the ws2812b-v5 protocol records; the AOP T1L window is wider (0.22-1.0 us against 580 ns-1 us). The sheets never mention WorldSemi. source ↗

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.

  • 2020-08-18 datasheet revision American Opto Plus L993L-QEPGBC-3I data sheet, 'Version 1.0 Date: 08-18-2020' ↗ day