
KL5KUSB105
Kawasaki LSI
2570 North First Street
Suite 301
San Jose, CA 95131
Tel: (408) 570-0555
Fax: (408) 570-0567
www.klsi.com
1
Ver. 1.8
USB to 4 Serial Ports
Description
The Kawasaki USB to 4 Serial enables your system to have the capability to communicate between the
USB (Universal Serial Bus) port and up to four serial port peripherals. This device meets the USB 1.0/1.1
and standard serial port specifications. All the advantages of USB are available to peripherals with serial
port interface such as plug and play capabilities. With the USB Standard of high-speed data transfers, this
device is ideal for connections to high-speed modems or ISDN terminal adapters. Kawasaki’s device and
software enable the USB interface to be transparent to the peripheral and requires no firmware changes.
This makes it possible for peripherals with serial interfaces to easily interface with USB with minimum
modifications. This feature is ideal for Legacy applications.
Features
Advanced 16 Bit processor for USB transaction
processing and control data processing
Compliant with the USB 1.0/1.1 (Universal
Serial Bus)
4 Serial Port
230kbps
128 byte FIFO
Plug and Play compatible
I
2
C interface
Utilizes low cost external crystal circuitry
1.5K x 16 internal RAM buffer for fast
communications
Debug UART for debug and code development
USB host device drivers available
Single-chip solution in a 100 pin LQFP
Block Diagram
Serial
IntSerial
Interface
Serial
Interface
Serial
Interface
(4)
PLL & Clock
Generator
16 Bit Address / Data Bus
16 Bit
Processor
Serial
Interface
Engine
RAM
(3KB)
Timer 0
USB
Interface
Mask
ROM
EEPROM
Serial
Interface
Timer 1
VP
VM
CLK
X2
SCL
SDA
Watchdog
Timer
Debug
UART
Txd
Rxd
DTR
RTS
DCD
DSR
Txd
Rxd
CTS
RI
Channel 3
Channel 4