www.national.com
2
Revision 1.1
G
Features
General Features
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32-bit x86 processor, up to 300 MHz, with MMX instruc-
tion set support
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Memory controller with 64-bit SDRAM interface
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PC/AT functionality
■
PCI bus controller
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IDE interface, two channels
■
USB, three ports, OHCI (OpenHost Controller Interface)
version 1.0 compliant
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Audio, AC97/AMC97 version 2.0 compliant
■
National’s Virtual System Architecture
technology
(VSA) support
■
Power management, ACPI (Advanced Configuration
Power Interface) version 1.0 compliant
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Package:
— 388-Terminal TEPBGA (Thermally Enhanced Plastic
Ball Grid Array)
GX1 Processor Module
■
CPU Core:
— 32-bit x86 processor, up to 300 MHz, with MMX
instruction set support
— 16 KB unified L1 cache
— Integrated Floating Point Unit (FPU)
— Re-entrant SMM (System Management Mode)
enhanced for VSA
■
Memory Controller:
— 64-bit SDRAM interface
— 78 to 100 MHz frequency range
— Direct interface with CPU/cache
— Supports clock suspend and power-down/self-
refresh
— Up to 8 SDRAM devices or one DIMM/SODIMM
Core Logic Module
■
Audio Codec Interface:
— AC97/AMC97 (Rev. 2.0) codec interface
— Legacy audio emulation using XpressAUDIO
— Six DMA channels
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PC/AT Functionality:
— Programmable Interrupt Controller (PIC), 8259A-
equivalent
— Programmable Interval Timer (PIT), 8254-equivalent
— DMA Controller (DMAC), 8237-equivalent
■
Power Management:
— ACPI 1.0 compliant
— Sx state control of three power planes
— Cx/Sx state control of clocks and PLLs
— Thermal event input
— Wakeup event support:
– Three general-purpose events
– UART RI# signal
– Infrared (IR) event
■
General Purpose I/Os (GPIOs):
— Six (6) dedicated GPIO signals
— 24 multiplexed GPIO signals
■
Low Pin Count (LPC) Bus Interface:
— Specification version 1.0 compatible
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PCI Bus Interface:
— PCI version 2.1 compliant with wakeup capability
— 32-bit data path, up to 33 MHz
— Glueless interface for an external PCI device
— Supports four PCI bus master devices
— Supports four PCI interrupts
— Rotating priority
— 3.3V signal support only
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Sub-ISA Bus Interface:
— Supports up to four chip selects for external memory
devices
– Up to 16 MB addressing
– Supports a chip select for ROM or Flash EPROM
boot device, up to 16 MB
– A chip select for one of:
–
M-Systems’ DiskOnChip DOC2000 Flash file
system
–
NAND EEPROM
— Supports up to two chip selects for external I/O
devices
– 8-bit (optional 16-bit) data bus width
– Cycle multiplexed with PCI signals
– Is not the subtractive decode agent
■
IDE Interface:
— Two IDE channels for up to four external IDE devices
— Supports ATA-33 synchronous DMA mode transfers,
up to 33 MB/s
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Universal Serial Bus (USB):
— USB OpenHCI 1.0 compliant
— Three ports