1.2 System Unit | 1 Hardware Overview |
1.2System Unit
The system unit is composed of the following major components:
Processor
•Intel Desktop P4 up to 2.4GHZ or Northwood upgradable
–mPGA478 package CPU
–FSB533 Northwood CPU 2.53G/2.66G/2.8G w/o HT
–FSB533 Northwood CPU 3.06G w/HT
–FSB800 Northwood CPU 2.4G/2.6G/2.8G/3.0G/3.2G w/HT
System Logic
•Intel chipset MCH Springdale PE
•Integrated DRAM controller
•Accelerated Graphics Port (AGP) Interface
•Hub Interface to Intel ICH5
•Power Management Functions
Fixed Disk Interface
•Intel 82801 EB I/O Controller HUB5 (ICH5)
KBC/EC (Keyboard Controller/Embedded Controller)
•One PC87591 chip functions as both KBC and EC.
•KBC 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
•EC has the following functions:
–Power supply sequence control
–Thermal conditions control
–LEDs control
–Beep control
–Devices ON/OFF control
–FAN revolutions rate control
–General Input/Output port control
–Docker power supply control
–Battery capacity check
–Flash rewriting
–Detection of abnormal condition
–EC I/F
–I2C Communication
–EC access
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