Features
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USB 2.0 full speed and PS/2 interface
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User-Programmable keyboard matrix
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4 sets of 8 x 18 keyboard matrix for Numlock and FN cases
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Up to 255 Custom/Macro keys: generate “LCTRL+LALT+DEL” or “000”
keys
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Key-controlled external PS/2 device lock feature without driver
required
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Built-in 8 direction KeyMouse
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Support one external PS/2 to interface an PS/2 mouse or
keyboard
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Key-controlled 3 general purpose output(GPO), 1 state control
output(SCO), Blackout control
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Support three FN control modes: Level, Toggle and Sticky
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Supports USB selective suspend and remote wakeup
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Built-in oscillator and digital circuit. No external crystal is
needed
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Windows® application to design keyboard matrix
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Low profile QFN 48 pin package: 7x7mm 1.0 Max (LxWxH)
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Low
power consumption. 265uA (USB suspend) and 5.1 mA (USB operation)
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Operating voltage: 4.35 to 5.25V (USB) and 1.71 to 5.25V
(PS/2)
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Commercial
temperature range: -40°C to +85°C
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Custom
versions available in small and large quantities
Overview
The SK5122 is a low power USB and PS/2 combo
keyboard encoder with a user-programmable keyboard matrix. The IC can be
programmed to any keyboard with four matrix tables for FN and NUMLOCK cases, so
the IC is the best choice for custom keyboard solution but with an
off-the-shelf IC.
The SK5122 scans and encodes an 8-row by
18-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 SK5122 provides an external PS/2 port that
supports hot plug and hot swap of PS/2 mouse and keyboard devices. If the IC is
configured to PS/2 interface, then the IC external PS/2 port supports only
keyboards. If the IC is configured to USB interface, then the IC external PS/2
port supports keyboards, mice including wheel mice.
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