USB to Serial
16 Bit Address / Data Bus
Description
The Kawasaki USB to Serial enables your system to have the capability to communicate between the
USB (Universal Serial Bus) port and 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)
• Serial Port
• 230kbps
• 128 byte FIFO
• Plug and Play compatible
Block Diagram
Interface
Interface
• I2C 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 44 pin QFP
Processor
Interface
(4)
DTR
RTS
DSR
RI
RAM
PLL & Clock
Generator
Kawasaki LSI • 2570 North First Street • Suite 301 • San Jose, CA 95131 • Tel: (408) 570-0555 • Fax: (408) 570-0567 • www.klsi.com
(3KB)
EEPROM
Serial
ROM
Rxd
UART_Rxd
KL5KUSB116 Application Block Diagram
USB to Serial
USB
USB Serial
Optional
External
Memory
Pin Diagram 44QFP
EEPROM
nTEST
nRESET
GND
DCD
DSR
CTS
DTR
RTS
RXD
GND
Serial
Device
VDD
3332313029282726252423
VM
CLK
21
TXD
20
UART_TXD
19
PLLEN
18
VDD
17
CP_OUT
16
V CO_IN
15
GND
14
SCL
13
VDD
XD_1
XD_2
XD_3
GND
XD_4
XD_5
XD_6
GND
XD_7
VDD
35
36
37
38
39
40
41
42
43
44
1234567891011
SDA
PU_1
GPIO_31
RI
GPIO_29
VDD
nPWR_PWN
GND
VP
Kawasaki LSI • 2570 North First Street • Suite 301 • San Jose, CA 95131 • Tel: (408) 570-0555 • Fax: (408) 570-0567 • www.klsi.com