Highlights
• High Performance Embedded Controller (EC)
• ACPI 2.0 Compliant
• PC2001 Compliant
• LPC Interface
- Supports LPC Bus frequencies of 19MHz to
33MHz
- Multiplexed Command, Address and Data
Bus
- Serial IRQ Interface Compatible with Serialized
IRQ Support for PCI Systems
- PME Interface
• 3.3-Volt I/O
• 128-pin QFP RoHS Compliant Package
• System Watch Dog Timer (WDT)
• Battery Backed Resources
- Power-Fail Status Register
- VBat backed 64 byte memory
• Extreme Low S5
- Enables power saving by shutting down
standby voltage regulators in system S5 state
- System wake from power button press
- System wake from LAN
• Two EC-based SMBus 2.0 Host Controllers
- Allows Master or Dual Slave Operation
- Controllers are Fully Operational on Standby
Power
- DMA-driven I2C Network Layer
- I2C Datalink Compatibility Mode
- Multi-Master Capable
- Supports Clock Stretching
- Programmable Bus Speeds
- 400 KHz Capable
- Hardware Bus Access “Fairness” Interface
- Detects SMBus Time-outs
- One controller can be multiplexed onto a low
voltage SMBus
• PECI Interface 2.0
- Supports PECI REQUEST# and PECI
READY signaling
- Supports up to 2 CPUs and 4 domains
• Temperature reading from PCH over SMBus
• Temperature reading from AMD-TSI over SMBus
• Temperature Monitor
- Monitoring up to 2 Remote Thermal Diodes
plus an Anti-Parallel Remote Thermal Diode
- Built-in ADC supports temperature readings
from -63 degrees Celsius to +192 degrees
Celsius
–Supports monitoring of discrete diodes (3904 type
diodes)
–Supports monitoring substrate diodes (45nm &
65nm processor diodes)
- Temperature resolution is 0.125 degrees Celsius
- Internal Ambient Temperature Measurement
- Out-of-limit Temperature Event reporting
• Bi-directional PROCHOT# Pin
- Interrupt generation for PROCHOT Assert
events
- May be used by AMTA and PTTA features to
adjust fan control limits
- May be configured to force fans on full
- Supports PROCHOT Assertions to external
CPU
- Supports PROCHOT Throttle Events to
external CPU
- Supports Interrupt Event to Host
• Voltage Monitor
- Monitoring VBAT, VTR,VCC and Vtt power
supplies
- Monitoring of one external voltage
- Limit comparison on monitored values
• PWM (Pulse width Modulation) Outputs (4)
- Multiple Clock Rates
- 16-bit ON and 16-bit OFF Counters
• Fan tachometer Inputs (4)
- Programmable to monitor standard tachometer
outputs or locked rotor alarm outputs
- Generate tachometer event when speed of
fan drops below programmed limit
• Internal clock sources
- A Ring Oscillator generates 64 MHz clock
- SIO clocks derived from a 96MHz PLL synchronized
to a 14.318MHz clock input
- Main ring generates 32kHz standby clock
when external 32.768KHz clock source is off
• Low Battery Warning