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PDF ( 数据手册 , 数据表 ) G1-233P-85-1.8

零件编号 G1-233P-85-1.8
描述 Processor Series Low Power Integrated x86 Solution
制造商 National Semiconductor
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G1-233P-85-1.8 数据手册, 描述, 功能
April 2000
Geode™ GX1 Processor Series
Low Power Integrated x86 Solution
General Description
The National Semiconductor® Geode™ GX1 processor
series is a line of integrated processors specifically
designed to power information appliances for entertain-
ment, education, and business. Serving the needs of con-
www.DataSheet4Ussuo.cmluomteiorsn
and business professionals alike, it’s the perfect
for IA (information appliance) applications such as
thin clients, interactive set-top boxes, and personal internet
access devices.
The Geode GX1 processor series is divided into three main
categories as defined by the core operating voltage. Avail-
able with core voltages of 2.0V, 1.8V, and 1.6V, it offers
extremely low typical power consumption (1.2W, 1.0W, and
0.8W, respectively) leading to longer battery life and
enabling small form-factor, fanless designs. Typical power
consumption is defined as an average, measured running
Microsoft Windows at 80% Active Idle (Suspend-on-Halt)
with a display resolution of 800x600x8 bpp at 75 Hz.
Geode™ GX1 Processor Internal Block Diagram
SYSCLK
Clock Module
SYSCLK
multiplied
by “A”
Core
Clocks
X-Bus
Clocks
16 KB
Unified L1
Cache
(128)
C-Bus (64)
x86 Compatible Core
Integer
TLB Unit
Instruction
Fetch
MMU
Load/Store
INT/NMI
Interrupt
Control
FP_Error
Floating Point
Unit
INTR
IRQ13
SMI#
SUSP#
SUSPA#
Power
Management
Control
Core Suspend
Core Acknowledge
X-Bus Suspend
X-Bus Acknowledge
X-Bus (32)
Arbiter
Write
Buffers
X-Bus
Controller
Read
Buffers
Arbiter
PCI Host
Controller
2D Accelerator
VGA
BLT Engine
ROP Unit
X-Bus CLK
divide by “B”
Display Controller
Compression Buffer
Palette RAM
Timing Generator
3
REQ/GNT
Pairs
PCI
Bus
4
SDRAM
Clocks
64-bit
SDRAM
RGB
YUV
Geode™ Graphics
Companion Interface
National Semiconductor and Virtual System Architecture are registered trademarks of National Semiconductor Corporation.
Geode, WebPAD, and VSA, are trademarks of National Semiconductor Corporation.
For a complete listing of National Semiconductor trademarks, please visit www.national.com/trademarks.
© 2000 National Semiconductor Corporation
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G1-233P-85-1.8 pdf, 数据表
Table of Contents (Continued)
5.0 Power Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
5.1
5.2
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5.3
POWER MANAGEMENT FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
5.1.1 System Management Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
5.1.2 Suspend-on-Halt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
5.1.3 CPU Suspend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
5.1.3.1 Suspend Modulation for Thermal Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
5.1.3.2 Suspend Modulation for Power Management. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
5.1.4 3 Volt Suspend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
5.1.5 GX1 Processor Serial Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
5.1.6 Advanced Power Management (APM) Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
SUSPEND MODES AND BUS CYCLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
5.2.1 Timing Diagram for Suspend-on-Halt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
5.2.2 Initiating Suspend with SUSP# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
5.2.3 Stopping the Input Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
5.2.4 Serial Packet Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
POWER MANAGEMENT REGISTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
6.0 Electrical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
6.1 PART NUMBERS/PERFORMANCE CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . 185
6.2 ELECTRICAL CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
6.2.1
6.2.2
6.2.3
6.2.4
Power/Ground Connections and Decoupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
6.2.1.1 Power Planes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
NC-Designated Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
Pull-Up and Pull-Down Resistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
Unused Input Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
6.3 ABSOLUTE MAXIMUM RATINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
6.4 RECOMMENDED OPERATING CONDITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190
6.5 DC CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
6.5.1 Input/Output DC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
6.5.2 DC Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
6.5.2.1 Definition of CPU Power States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
6.5.2.2 Definition and Measurement Techniques of CPU Current Parameters. . . . . . . . . . . 191
6.5.2.3 Definition of System Conditions for Measuring “On” Parameters . . . . . . . . . . . . . . . 192
6.5.2.4 DC Current Measurements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
6.6 I/O CURRENT DE-RATING CURVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
6.6.1
6.6.2
6.6.3
Display Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
Memory Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
I/O Current De-rating Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
6.7 AC CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
7.0 Package Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
7.1 THERMAL CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
7.1.1 Heatsink Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
7.2 MECHANICAL PACKAGE OUTLINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210
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#
Revision 1.0







G1-233P-85-1.8 equivalent, schematic
Architecture Overview (Continued)
1.7.1 Reference Designs
As described previously, the GX1 series of integrated pro-
cessors is designed specifically to work with National’s
Geode I/O and graphics companion devices. To help define
and drive the emerging information appliance market, sev-
eral reference systems have been developed by National
Semiconductor. These GX1 processor based reference
systems provide optimized and targeted solutions for three
main segments of the information appliance market: Per-
sonal Internet Access, Thin Client, and Set-top Box. Con-
tact your local National Semiconductor sales or field
support representative for further information on reference
designs for the information appliance market.
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NSC
LM4549
Codec
Geode™
GX1
Processor
Control
Data
SDRAM
PCMCIA
Flash
Card
Optional
Embedded OS
Applications
Bootloader
Run-Time Diagnostics
Storage
Ultra DMA/33
USB Port
Geode™
CS5530
I/O
Companion
3.3V PCI Bus
RF Interface
ISA Bus
Buttons
Pwr Mgmt Microcontroller
DC Sense
Backlight
DSTN
Linear
Flash
(8 MB)
Embedded OS
Applications
Bootloader
Run-Time Diagnostics
Storage
Geode™
CS9211
Graphics
Companion
Li Batteries/
Charger
Touch
Control
512 KB DRAM
Figure 1-6. Example WebPAD™ System Diagram
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16
Revision 1.0










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