Features
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Generals
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Low cost and space saving solution
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Built-in oscillator, analog and digital circuit
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Supports “Selective Suspend”. Remote wake up need be supported
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Works with standard Windows® mouse drivers
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Low profile QFN 56 pin packages: 8x8mm 0.90 Max (LxWxH)
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Low power consumption. TBD uA (idle), TBD mA
(operation)
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3.0V to 5.25V operating voltage
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Temperature range: -10°C to +85°C
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Keyboard Section
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USB bootable keyboard
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4 Keyboard matrixs are programmable for FN and Numlock
On/Off combination cases
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8X16 keyboard matrix scan
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Supports USB page 1 power keys and page C consumer keys.
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At least 24 macro keys. Each combination key support
maximum up to 8 key’s combination
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Advanced ghost key detection
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Supports external electronics switches to simulate key press
and key release.
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Directly driven LEDs: CapsLock, NumLock and ScrollLock.
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Pointing Stick Section
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USB bootable mouse
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Low count of total components. Only several resistors and
capacitor are needed
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Advanced motion control algorithm
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Z-Tap algorithm to simulate left button click, double click and
drag
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3 mouse buttons: left, middle and right
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External PS/2 Mouse Port
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Support PS/2 Pass-through mode. The mouse driver can send PS/2
commands to the port and receive response from the port
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Supports customized mouse packets. The following companies’
mouse packets can be passed to the driver without
interpretation: Synaptics touchpad, Alps touchpad, Elantech touchpad
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Supports Micrsoft 2 button mouse, IBM 3 button mouse, Microsoft
wheel mouse, and Microsoft 5 button mouse
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Others
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Supports PWM dimming backlight brightness control (off, 50%
and100%) and automatically turned off feature
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Supports blackout all LEDs
Overview
The SK7190 IC is a USB keyboard and pointing stick combo
encoder IC with one external mouse PS/2 port. The SK7190 scans keyboard matrix,
encode the key press information to USB keyboard protocol, samples a
forces stick sensor and encode the force change information to USB mouse
protocol, and send the information to host PCs. The SK7190 also
accepts reports one external PS/2 mouse via the external PS/2 port, and
converts the reports to USB mouse protocol, and send them to host PCs.
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