MiTAC 7521 PLUS/N service manual Integrated Interrupt Controller, Integrated Keyboard Controller

7521Plus / N N/B MAINTENANCE

Integrated Interrupt Controller

Two 8237A Compatible DMA Controller

Two 8259A Compatible Interrupt Controllers

Level or Edge Triggered programmable

Serial IRQ

Interrupt Source Re-routable to Any IRQ channel

Three 8254 Compatible Programmable 16-bits counters

System timer interrupt

Generate refresh request

Speaker output

Integrated Keyboard Controller

Hardwired Logic Provides Instant Response

Supports PS/2 Mouse Interface

Password Security and Password Power-Up

System Sleep and Power-Up by Hot-Key

KBC and PS2 Mouse Can Be Individually Disabled

Integrated Real Time Clock (RTC) with 256B CMOS SRAM

Supports ACPI Day-Month and Month-of-Year- Alarm

256 Bytes of CMOS SRAM

Provides RTC H/W Year 2000 Solution

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