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1.2 System Unit Block Diagram 1 Hardware Overview
VGA Controller
One Trident XP4-MCM chip is used. The video controller incorporates graphics accelerator,
video accelerator.
• Internal VRAM, 32MB DDR 250MHz (64MB is also supported.)
• Connected to AGP bus R2.0
• LCD Interface LVDS 2ch
• TV Encoder: Tvxpress2
• DVI Supported by Dock
Sound Controller
• One AC'97Codec AD1981A chip and AC-Link controller embedded in ICH4-M
• SW sound
EC/KBC (Embedded Controller/Keyboard Controller)
• One Mitsubishi M306K9FCLRP micon chip functions as both EC and KBC.
• EC
This controller controls the following functions:
– Power supply sequence
– Thermal conditions
– LEDs
– Beep
– Device ON/OFF
– Fan speed
– Universal I/O port
– Docker Docking Sequence
– Battery capacity check
– Forced reset
– Flash rewriting
– EC interface
– I2C communication
– EC access
– Slim Select Bay Control
• KBC
This controller has the following functions:
– Scan controller to check status of keyboard matrix
– Interface controller between the keyboard scan controller and the system
– Control of switching and simultaneous operation of the accupoint/external
PS/2 mouse and of the internal keyboard/external PS/2 keyboard
TECRA M1 Maintenance Manual (960-436) 1-13