The SK5102 is a USB keyboard and KeyMouse combo encoder with a user-programmable keyboard matrix. The IC can be programmed to any keyboard with four matrix tables for FN and NUMLOCK(or RFN) cases, so the IC is the best choice for custom keyboard solution but with an off-the-shelf IC.
The SK5102 scans and encodes an 8-row by 20-column matrix. The key press events are translated to keyboard and mouse report. The encoder gets matrix information from on-chip flash matrix table. Sprintek provides Windows® application FlexMatrix Editor and Programmer software to edit, download and upload the matrix table.
The SK5102 scans AB rotary encoder inputs then map the rotation events to two key locations in the key matrix.
The SK5102 provides an external PS/2 port that supports hot plug and hot swap of PS/2 mouse including wheel mouse, and keyboard devices.