Acer Extensa 61X Service Manual page 72

32-bit addressability
Provides compatible DMA transfers
Provides type F transfers
Interrupt controller
Provides 14 interrupt channels
Independently programmable level/edge triggered channels
Counter/Timers
Provides 8254 compatible timers for system timer, refresh request, speaker output use
Keyboard controller
Built-in PS2/AT keyboard controller
The specific I/O is used to save the external TTL buffer
Real time clock
Built-in real-time clock
128-byte CMOS RAM with 2µA standby current maximum
Plug-and-Play port support
programmable chip select
Steerable interrupt request lines
PMU interface
Supports CPU SMM mode, SMI feature
Supports programmable stop clock throttle
Supports the APM control
Provides external suspend mode switch/turbo switch/ring-in switch
Provides four system states for power saving (on, doze, standby, suspend)
Provides three timers from 1 second to 300 minutes to individually monitor VGA, MODE,
IN status
Supports RTC alarm wake up control
IDE interface
Built-in PCI IDE master controller
Supports PIO modes up to mode 5 timings, and multiword DMA mode 0, 1, 2
8 x 32-bit pre-read and posted-write buffers
Dedicated pins for ATA interface
Supports up to 256 KB ROM size decode
Reserved USB interface
208-pin PQFP package
Major Chips Description 2-15