Companion - Lippert Cool SpaceRunner LX800 Technical Manual

Processor functional blocks are
·
CPU Core
·
GeodeLink™ Control Processor
·
GeodeLink Interface Units
·
GeodeLink Memory Controller
·
Graphics Processor
· Display Controller
· Video Processor
· Video Input Port
·
GeodeLink PCI Bridge
·
Security Block
For further information please refer to the data book of the AMD Geode

3.2 Companion

AMD Geode™ CS5536 companion device
The AMD Geode™ CS5536 companion device is designed to work with an integrated processor North Bridge
component such as the AMD Geode™ GX/LX processor. Together, the Geode GX/LX processor and Geode
CS5536 companion device provide a system-level solution well suited for the high-performance and low-power
needs of a host of embedded devices including digital set-top boxes, mobile computing devices, thin client
applications, and single board computers.
The internal architecture uses a single, high-performance modular structure based on GeodeLink™ architecture.
This architecture yields high internal speed (over 4 GB/s) data movement and extremely versatile internal power
management. The GeodeLink™ architecture is transparent to application software. Communication with the
Geode GX/LX processor is over a 33/66 MHz PCI bus.
The Geode CS5536 companion device incorporates many I/O functions, including some found in typical Super-I/O
chips, simplifying many system designs. Since the graphics subsystem is entirely contained in the Geode GX/LX
processor, system interconnect is simplified. The device contains state-of-the-art power management that
enables systems, especially battery powered systems, to significantly reduce power consumption.
Audio is supported by an internal controller, designed to connect to multiple AC97 compatible codecs. An IR
(infrared) port supports all popular IR communication protocols. The IR port is shared with one of two industry-
standard serial ports that can reach speeds of 115.2 kbps. An LPC (low pin count) port is provided to facilitate
connections to a Super-I/O should additional expansion, such as a floppy drive, be necessary, and/or to an LPC
ROM for the system BIOS
The hard disk controller is compatible to the ATA-5 specification. The bus mastering IDE controller includes
support for two ATA-compliant devices on one channel. The CS5536 companion device provides four Universal
Serial Bus (USB) 2.0 compliant ports, supporting low speed, full speed, and high speed connections. All four ports
are individually automatically associated with either the Open Host Controller Interface (OHCI) or the Enhanced
Host Controller Interface (EHCI) depending on the attached device type. A real-time clock (RTC) keeps track of
time and provides calendar functions.
A suite of 82xx devices provides the legacy PC functionality required by most designs, including two PIC's
(programmable interrupt controllers), one PIT (programmable interval timer) with three channels, and DMA (direct
memory access) functions. The CS5536 companion device contains eight MFGPT's (multi-function general
purpose timers) that can be used for a variety of functions. A number of GPIO's (general purpose input/outputs)
are provided, and are assigned to system functions on power-up.
State-of-the-art power management features are attained with the division of the device into two internal power
domains. The GPIO's and multi-function timers are distributed into each domain allowing them to act as wakeup
sources for the device. The device provides full ACPI (Advanced Configuration Power Interface) compliance and
supports industry-standard Wakeup and Sleep modes.
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