The CENTAUR KS8695PX, Multi-Port PCI Gateway Solution,
delivers a new level of networking integration, performance,
and overall BOM cost savings, enabling original equipment
manufacturers (OEMs) to provide customers with feature-
rich, low-cost solutions for the residential gateway and small
office environment.
• Integration of a PCI arbiter supporting one external mas-
ter.
– Allows incorporation of a variety of productivity en-
hancing system interfaces, including the expanding
802.11 a/g/b wireless LAN.
• High-performance ARM
TM
CPU (ARM9) with 8KB
I-cache, 8KB D-cache, and a memory management unit
(MMU) for Linux and WinCE
®
support.
• XceleRouter
TM
technology to accelerate packet process-
ing.
• Proven wire-speed switching technology that includes
802.1Q tag-based VLAN and quality of service (QoS)
support.
• Five patented mixed-signal, low-powered Fast Ethernet
transceivers with corresponding media access control
(MAC) units.
• Advanced memory interface with programmable
8/16/32-bit data and 22-bit address bus with up to 64MB
of total memory space for Flash, ROM, SRAM, SDRAM,
and external peripherals.
Functional Diagram
CENTAUR KS8695PX
Advanced Memory Controller
External I/O
Controller
FLASH/ROM/
SRAM
Controller
SDRAM
Controller
ARM9™
High Speed AMBA Bus
MMU
8KB
I-Cache
8KB
D-Cache
XceleRouter™
APB
Bridge
Switch
Registers
Advanced Peripheral Bus (APB)
Interrupt
Controller
1 External
PCI Master
PCI
Host
Bridge
High-Performance
Non-Blocking
5-Port Switch
16 GPIOs
UART
10/100
MAC
TX/FX
PHY
10/100
MAC
TX/FX
PHY
10/100
MAC
TX/RX
PHY
10/100
MAC
TX/RX
PHY
10/100
MAC
TX/RX
PHY
Timer/
Watchdog
XceleRouter is a trademark of Micrel, Inc. AMD is a registered trademark of Advanced Micro Devices, Inc. ARM is a trademark of Advanced RISC Machines Ltd.
Intel is a registered trademark of Intel Corporation. WinCE is a registered trademark of Microsoft Corporation.
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
September 2005
1
M9999-091605
KS8695PX
Micrel
•
Memory and External I/O Interfaces
– 8/16/32-bit wide shared data path for Flash, ROM,
CPU Features ...........................................................................................................................................................................15
PCI to AHB Bridge Features .....................................................................................................................................................15
Advanced Memory Controller Features ....................................................................................................................................16
Direct Memory Access (DMA) Engines .....................................................................................................................................16
Protocol Engine and XceleRouter™ Technology .....................................................................................................................16
Other Features ..........................................................................................................................................................................16
System Level Hardware Interfaces ...........................................................................................................................................17
System Clock ............................................................................................................................................................................18
Signal Descriptions by Group ...................................................................................................................................................21
Memory Map Example ..............................................................................................................................................................31
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