EP80579 Datasheet, PDF (266/1916 Pages) Intel Corporation – Intel® EP80579 Integrated Processor Product Line

Intel^® EP80579 Integrated Processor
9.6.13
9.6.14
9.6.15
Watchdog Timer
• Selectable Prescaler:
— Approximately 1 MHz (1 µs to 1 s).
— Approximately 1 KHz (1 ms to 10 min.)
• 33 MHz Clock (30 ns Clock Ticks).
• Multiple Modes (WDT and Free-Running).
• Free-Running Mode:
— One Stage Timer.
— Toggles WDT_TOUT# after programmable time.
• WDT Mode:
— Two Stage Timer (First Stage generates Interrupt, Second Stage drives
WDT_TOUT# low).
— First Stage generates an SERIRQ, NMI or SMI interrupt after Programmable
time.
— Second Stage drives WDT_OUT# low or inverts the previous value.
— Used only after first timeout occurs.
— Status bit preserved in RTC well for possible error detection and correction.
— Drives WDT_TOUT# if OUTPUT is enabled.
• Timer can be disabled (default state) or Locked (Hard Reset required to disable
WDT).
• WDT Automatic Reload of Preload value when WDT Reload Sequence is performed.
Serial Port
• Two Full Function 16550 Compatible Serial Ports.
• Configurable I/O addresses and interrupts.
• 16-Byte FIFOs.
• Supports up to 115 Kbps.
• Programmable Baud Rate Generator.
• Modem Control Circuitry.
• 14.7456 MHz and 48 MHz supported for UART baud clock input.
GPIO
• General Purpose I/Os .
• There are 36 GPIO pins of which 5 have alternate power on functions.
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Intel^® EP80579 Integrated Processor Product Line Datasheet
266
August 2009
Order Number: 320066-003US