Description

The product contains an internal controller made on a single-chip AT89C52-PI computer that scans the matrix of keys, controls indicators, internal diagnostics, and communicates with the system board via a serial interface on the KB-Data and KB-Сlosk lines.
Sensors based on the Hall effect (PKBn14-3 switches), which have increased reliability, durability,
and provide at least 108 switching cycles, are used as keypress sensors.
The keyboard has 84 keys. The reduction in the number of keys was achieved by combining the keys of the additional field (digital dial) with the main alphanumeric field and combining the function keys according to the least used principle. Combined keys are selected with the FN key pressed. When you press FN + Num Lock, the combined keys of the digital dial are connected / disconnected.
Structurally, the keyboard is made in the form of a module built into the tabletop of the base product and corresponds to the execution of gr. 2.1.1, 1.4.1 GOST RV 20.39.304-98.