Geode™ GXLV Processor Series Low Power Integrated X86 Solutions
April 2000
Geode™ GXLV Processor Series
Low Power Integrated x86 Solutions
General Description
The National Semiconductor
®
Geode™ GXLV processor
series is a new line of integrated processors specifically
designed to power information appliances for entertain-
ment, education, and business. Serving the needs of con-
sumers and business professionals alike, it is the perfect
solution for information appliance applications such as
thin clients, interactive set top boxes, and personal inter-
net access devices.
The GXLV processor series is divided into three main cat-
egories as defined by the core operating voltage. Avail-
able with core voltages of 2.2V, 2.5V, and 2.9V, it offers
extremely low typical power consumption (1.0W to 2.5W)
leading to longer battery life and enabling small form-fac-
tor, fanless designs. Each core voltage is offered in fre-
quencies that are enabled by specific system clock and
multiplier settings. This allows the user to select the
device(s) that best fit their power and performance
requirements. This flexibility makes the GXLV processor
series ideally suited for applications where power con-
sumption and performance (speed) are equally important.
Typical power consumption is defined as an average,
measured running Microsoft’s Windows at 80% Active Idle
(Suspend-on-Halt) with a display resolution of 800x600x8
bpp at 75 Hz.
Internal Block Diagram
I/O Companion
Clock Module
SYSCLK
SYSCLK
multiplied by
A
Core
Clocks
X-Bus
Clocks
X86 Compatible Core
INT/NMI
Interrupt
Control
INTR
IRQ13
SMI#
TLB
Integer
Unit
FP_Error
Scratchpad
16 KB
Unified L1
Cache
(128)
Instruction
Fetch
MMU
Load/Store
Floating Point
Unit
C-Bus (64)
X-Bus Controller
Write Buffers
Arbiter
Read Buffers
SUSP#
Power
Management
Control
Core Suspend
Core Acknowledge
X-Bus Suspend
X-Bus Acknowledge
X-Bus (32)
SUSPA#
2D Accelerator
Arbiter
PCI Host
Controller
VGA
BLT Engine
ROP Unit
X-Bus Clk ÷ B
Display Controller
Compression Buffer
Palette RAM
Timing Generator
3
REQ/GNT
Pairs
PCI Bus
4
SDRAM
Clocks
64-bit SDRAM
RGB
YUV
Video Companion Interface
National Semiconductor is a registered trademark of National Semiconductor Corporation.
Geode and WebPAD are trademarks of National Semiconductor Corporation.
For a complete listing of National Semiconductor trademarks, please visit www.national.com/trademarks.
© 2000 National Semiconductor® Corporation
www.national.com
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