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USB245 Datasheet

  • USB245

  • Pinout Information

  • 6頁(yè)

  • ETC

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USB245
Res. [1]
Res. [2]
Res. [3]
SD7 [4]
SD6 [5]
SD5 [6]
SD4 [7]
SD3 [8]
SD2 [9]
SD1 [10]
SD0 [11]
GND [12]
[24] VCC
[23] FILTER_VCC
[22] USB_VCC
[21] DM
[20] DP
[19] GND
[18] TXE#
[17] WRITE
[16] READ#
[15] RESET#
[14] RXF#
[13] RCCLK
Res.
SD(0..7)
RCCLK
RXF#
RESET#
READ#
WRITE
TXE#
DP
DM
USB_VCC
FILTER_VCC
VCC
GND
Pinout
Information
Reserved, Unconnected. Do not use.
Data Bus. Driven when READ# is asserted.
Data inputs when WRITE is asserted.
Output of the onboard RC Timer.
Active low output. When asserted, receive
data is available, and can be read from FIFO.
Active Low output. Remains low for 140msec
after power-up, then goes high.
Active Low input. When low, the device drives
the current receive FIFO data onto SD0-SD7.
Input that Clocks Data at SD0-SD7 into
transmit FIFO on a High-to-Low transition.
Active Low Output. When asserted, signifies
transmit FIFO space is available.
USB Plus Data Signal.
USB Minus Data Signal.
Input to onboard 5volt power filter.
Output of onboard 5volt power filter.
5 Volt power input.
Ground.
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
USB ver1.1 compatible device with
a 384 byte transmit FIFO and 128
Byte receive FIFO.
Works with FTDI鈥檚 Virtual Com
Port (VCP) and D2XX Drivers for
Microsoft Windows.
Small Size: Surface Mount
Technology allows the device to fit
in standard 24 pin DIP socket.
Preprogrammed 93C46 EEPROM
with unique USB device information.
Easy to use 8-bit microcontroller-
microprocessor interface with FIFO
status lines
The USB245 is small, easy to use device with all necessary
timing circuits, and power filtering built in.
Each contains a preprogrammed EEPROM which holds the
device and vendor ID codes.
The 8-bit data bus easily connects to processor data buses.
The two control bus lines (READ# and WRITE) direct data flow
from the device, while two status lines (TXE# and RXF#) give
information about the state of the internal transmit and receive
FIFOs. The status lines can also be used as interrupt sources
for the processor.
The onboard RESET# line is routed externally and can be
used to drive other circuits.
The device can be wired to derive and source power from
the USB bus, or alternatively have power sourced from the
processor interface.
All Trademarks are property of
their respective owners
漏 2002 Xylotex
www.xylotex.com

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