
KL5KUSB121
USB to 10/100 Ethernet Controller
Kawasaki LSI
2570 North First Street
Suite 301
San Jose, CA 95131
Tel: (408) 570-0555
Fax: (408) 570-0567
www.klsi.com
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Ver. 1.1
PRELIMINARY
General Description
The Kawasaki KL5KUSB121 Controller is a unique single chip solution to interface peripheral
devices to the Universal Serial Bus (USB) and Ethernet. The KL5KUSB121 has been specifically
designed to provide a simple solution to communicate with Ethernet applications as well as other
USB peripheral devices. This has been accomplished by its highly integrated functionality. The
USB controller consists of a central 16-bit processor, mask ROM, RAM buffer, clock generator,
Ethernet interface, UART, IRQ, Watchdog Timer, Serial interface, External Memory Interface and
SPORT Interface. The SIE (Serial Interface Engine) is fully compatible with the USB specification.
Our powerful internal processor enables Remote NDIS (Network Drive) which gives compatibility
with next generation operating systems and faster data transfer. This USB to Ethernet controller
is ideal for LAN (Local Area Network), HAN (Home Area Network), Cable Modem, Set Top
Boxes, or Mobile Networking applications.
Features
Advanced 16 Bit processor for USB transaction
processing and control data processing
10/100Base-T compatibility
USB interface ver. 1.0/1.1 compliant
Transceivers and SIE (Serial Interface Engine)
Internal Clock Generation - Utilizes low cost
external 12MHz crystal circuitry
MII Physical Layer interface
1.5K x 16 Internal RAM buffer
Remote NDIS for faster data transfer.
Fully IEEE 802.3 compliant 10 Mbit/sec
Ethernet MAC Layer. Interfaces serially of
an external ENDEC PHY.
UART
External memory interface
LQFP package
Serial Interface for external EEPROM
Block Diagram
RAM
(3KB)
Timer 0
USB Interface
16 Bit Address / Data Bus
Data -
Data +
Serial
Interface
Engine
Mask ROM
(8KB)
Timer 1
Watchdog
Timer
16 Bit
Processor
UART
Txd
Rxd
10/100 Mb/s
Ethernet
Interface
MII PHY
Interface
EEPROM
Serial Interface
DIO
CK
SRAM Interface
A15-0
D15-0
Cntrl.
X2
X1
Clock Gen. &
Internal PLL
IRQ
INT 1-0
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