Specifications

Super I/O Controller
• SMSC LPC47N227
• Outstanding Features
• LPC bus interface, based on Intel’s LPC Interface Specification Revision 1.01, February
1999 (supports CLKRUN and LPCPD signals)
• PC99 and ACPI compliant
• Serial IRQ support (15 options)
• Interrupt Serializer (4 Parallel IRQs to Serial IRQ)
• Intermal FDD signal support
• 5V tolerant and back-drive protected pins (except LPC bus pins)
• 100-pin TQFP Package
Keyboard Controller
• NS87591
• KBC standard interface
• Support three independent PS/2 devices ( K/B, mouse and internal pointing device )
• Real Time Clock (RTC )
DS1287,MC146818 and PC87911 compatible
• Four on chip times
16-bit programmable timer base counter with 5 bit prescaler
8-bit WATCHDOG timer
16-bit timer with 30-us resolution
16-bit general purpose timer with PWM and Capture Capabilities
• Support AMP1.2
• Active mode operating frequency 4-10 MHz
Chapter 1-5