參數(shù)資料
型號(hào)： TUSB3410UARTPDK
廠商： Texas Instruments, Inc.
英文描述： TUSB3410_UART Evaluation Board(TUSB3410_UART評(píng)估板)
中文描述： TUSB3410_UART評(píng)估板（TUSB3410_UART評(píng)估板）
文件頁(yè)數(shù)： 10/14頁(yè)
文件大小： 163K
代理商： TUSB3410UARTPDK
Equipment
1-2
1.1
Equipment
Figure 1
–
1.TUSB3410_UART Evaluation Equipment
USB EVM
1.2
Hardware Overview
The TUSB3410_UART EVM is an application specific design that focuses on
a USB to UART interface. The EVM provides a bridge between the USB bus
and a UART RS
–
232 port. The EVM runs off a 12
–
MHz crystal, and uses an
I
2
C serial EEPROM for potential customization (firmware can also be
downloaded over the USB bus). The EVM contains a 5
–
V to 3.3
–
V voltage
regulator, and power is provided over the USB cable (bus powered). A type B
USB connector and an RS
–
232 DB9 male connector provide the access
points. Simply connect a standard USB cable from the EVM to the PC and then
connect your RS
–
232 application to the DB9 port.
The EVM is 3 cm by 6 cm. See Figure 1
–
2 for a photograph of the EVM. The
EVM contains two jumpers, one LED, and one switch. Neither jumper usually
needs to be in place.
Jumper 1 (JP1) is used to bring the LED into the circuit, which glows when the
device is in the USB defined suspend low power state. Note that the LED is
only intended for test purposes to verify that the device has gone into the
suspend state. The LED consumes about 1.5 mA, which is above the current
limit allowed when in suspend, so JP1 should be removed for normal
operation.
The other jumper (JP2) is used to connect the serial clock (SCL) from the
TUSB3410 to the optional serial I
2
C EEPROM. The EEPROM can be used to
modify the default descriptor information and firmware. For most initial demo
applications, TI recommends using TI provided firmware, which can be
downloaded over USB into the TUSB3410 at connection time.
The switch (SW1) is normally open and can be used to reset the device. There
is a power up reset circuit built into the board, so the reset switch rarely needs
to be used.
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