Hardware Functional Overview 3-9
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True-color and Hi-color display capability with flat panels and CRT monitors up
to 640x480 resolution
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Advanced power management features minimize power consumption during:
Normal operation
Standby (Sleep) modes
Panel-Off Power-Saving Mode
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Power Sequencing control outputs regulate application of Bias voltage, +5V to
the panel and +12V to the inverter for backlight operation
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Fully compatible with IBM VGA
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EIAJ-standard 208-pin plastic flat pack
External VGA Capability
The NEC Versa 550 Series notebooks provide a 15-pin female D-type external VGA con-
nector that can be connected to an external video graphics adapter (VGA) type monitor.
Another feature of the notebook computer is the ability to auto-sense the display output to
both LCD and the external CRT monitor. The notebook provides external resolution of
800x600 by 256 colors or 1024x768 by 256 colors for NEC Versa 500D2/550D with 1MB
video memory (800x600 by 16 colors or 1024x768 by 16 colors for NEC Versa 500D1
with 512KB memory). The 500D2/550D can also provide simultaneous display at 640x480
by 256 colors with the standard VGA DSTN LCD.
KEYBOARD SUBSYSTEM
The Keyboard Subsystem of the notebook is implemented on the Motherboard and Key-
board Assembly using the Motorola G10 Lapkat keyboard controller chip.
The NEC Versa 550 Series keyboard is an 85/86-key, IBM enhanced-type keyboard with
standard characters and function keys plus 12 programmable function keys and the Special
Function (Fn) key. The notebook also provides an external PS/2 port in supporting an ex-
ternal PS/2 keyboard or standard DIN-type AT-keyboard. See Chapter 1 for more informa-
tion.
Summary of Contents for Versa 550 Series
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