2003 National Semiconductor Corporation
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G
General Description
The Geode SC1100 device is a member of the National
Semiconductor
Information Appliance On a Chip (IAOC)
family of fully integrated x86 system chips. The main mod-
ules of the Geode SC1100 are:
Geode GX1 processor module - Combines advanced
CPU performance with Intel MMX support, a 64-bit
synchronous DRAM (SDRAM) interface, and a PCI bus
controller.
Core Logic module - Includes PC/AT functionality, a USB
interface, an IDE interface, a PCI bus interface, an LPC
bus interface, Advanced Configuration Power Interface
(ACPI) version 1.0 compliant power management, and
an audio codec interface.
SuperI/O module - Has a Serial Port (UART), an Infrared
(IR) interface, two ACCESS.bus (ACB) interfaces, and a
Real-Time Clock (RTC).
The block diagram shows the relationships between the
modules.
These features, combined with the device’s small form fac-
tor and low power consumption, make it ideal as the core
for an advanced set-top box, consumer access device, res-
idential gateway, thin client, or embedded system.
Block Diagram
CPU
Core
Geode GX1
Memory Controller
PCI Bus
Controller
Clock & Reset Logic
Config.
Block
Fast-PCI Bus
IDE I/F
Fast X-Bus
PIT
DMAC
Pwr Mgmnt
Configuration
ISA Bus I/F
PIC
USB
GPIO
PCI/Sub-ISA
Bus I/F
Audio Codec I/F
LPC I/F
ISA Bus
I/F
P
ACB1
I/F
ACB2
I/F
UART
IR
Bridge
RTC
Core Logic
SuperI/O
X-Bus
March 2003
Revision 1.1
Geode SC1100
Information Appliance On a Chip
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