The IST83020B datasheet from Instant Microelectronics details features, pin definitions, lighting modes, and electrical specifications of the USB backlit…
The IST83020B is a USB low‑speed gaming keyboard controller chip that supports multiple backlight modes, Fn‑key combinations, and up to 26‑key no‑ghosting. It includes a matrix of 20 × 8 pads, three single‑wire RGB LED channels, and an integrated volume encoder.
The document provides a system block diagram, detailed PAD pinout, descriptions of the three selectable keyboard matrices, lighting mode tables, electrical characteristics, typical application circuits, PCB layout and wiring examples, and a revision history. This manual is written in Chinese.
| USB Interface | Low‑speed, USB 2.0 compatible, meets USB HID 1.1 |
|---|---|
| Keyboard Matrix | 20 × 8 pads |
| Maximum NKRO | 26‑key no‑ghosting (also supports 19‑key) |
| LED Channels | Three single‑wire RGB channels (SLED0‑2) |
| LEDs per Channel | Up to 9 LEDs per channel |
| Supply Voltage | 5 V (VDD) |
Press Fn+Scr to cycle through the lighting modes such as flow, comet tail, single‑lane, etc.
The chip supports up to 26 keys without ghosting (19‑key mode is also available).
It is a USB low‑speed device compatible with USB 2.0 and meets the USB HID 1.1 specification.
Three single‑wire RGB channels (SLED0, SLED1, SLED2) are provided.