addressable.wiki

P9813

SPI RGB · DMS Microelectronics · p9813

Channels
RGB
Bits / channel
8
Supply
5–6.5 V
PWM
—
Backup data
no
Packages
0

A clock-and-data driver for external LEDs (12 V and 24 V application circuits are in the sheet). It drives external LEDs, so the catalogue holds it as a protocol only: no LED-with-IC package of it was found. The sheet is a machine-translated DMS Microelectronics document with no date, revision or country. Not checked against any library.

Refresh & flicker

A driver IC, not an LED: three constant-current outputs of 0-45 mA set by a single external resistor (24 kOhm gives 20 mA, 10 kOhm 36 mA, 6.8 kOhm 46 mA), output pins good for 17 V, SOP-14 and DIP-14 packages. An internal 1.2 MHz ring oscillator keeps modulating the outputs if the clock stops (“free-run”). The PWM frequency is not stated in the sheet. A PLL regenerates the data signal for 1 MHz transfer across up to 1024 cascaded pixels.

Frame format

P9813 SPI frameP9813 clocked frame: start frame, one 32-bit LED frame per pixel with brightness and colour bytes, and an end frame, plus data and clock waveforms1 · Frame stream (data clocked on CLK)Start frame32 × 0LED 132 bitsLED 232 bits…LED N32 bitsEnd frameclock ≥ N/2 edgeseach LED forwards what it does not keep on DO / CO2 · One LED frame: 32 bits, MSB first111brightch 1 8ch 2 8ch 3 83 marker bits (111), 5-bit global brightness 0–31, then 8-bit channels3 · DATA and CLK, first 8 bits of an LED frameDATACLK11110010111 markerbrightness bits 4..0data changes while CLK is low,LED samples on the rising edgeno fixed bit period: clock rateis set by the host
Frame layout: APA102-family 32-bit LED frames convention, see the protocol notes for end-frame differences
SourceT0HT0LT1HT1LPeriodRateReset±
datasheet ↗ — — — — — — — —
The JEN pin selects whether the check bits are verified (JEN = 0) or ignored (JEN = 1). The sheet gives no clock minimum widths.

Clones & compatibility

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

  • electrically similar APA102

    Both are clock-plus-data chains with a 32-bit zero start frame and 32 bits per pixel in blue-green-red order, but the P9813 flag is two bits and is followed by inverted check bits rather than a 3-bit flag and 5-bit global brightness, so frames are not interchangeable. source ↗

Library support

Parts using this protocol

No package is catalogued for this protocol yet — it is seeded for family completeness, or it is a driver IC that drives external LEDs rather than shipping as an integrated package.