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USB245 の電気的特性と機能

USB245のメーカーはETCです、この部品の機能は「Pinout Information」です。


製品の詳細 ( Datasheet PDF )

部品番号 USB245
部品説明 Pinout Information
メーカ ETC
ロゴ ETC ロゴ 




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USB245 Datasheet, USB245 PDF,ピン配置, 機能
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
Pinout Information
[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
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.
USB ver1.1 compatible device with
a 384 byte transmit FIFO and 128
Byte receive FIFO.
Works with FTDI’s 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
© 2002 Xylotex
www.xylotex.com

1 Page





USB245 pdf, ピン配列
Device Function
A processor can use the status lines TXE# and RXF# in either a polled or interrupt manner.
The TXE# line will go active LOW indicating that there is room available in the 384 bytes transmit
buffer for the processor to place another byte for transmission over the USB bus. The RXF# line
will go active LOW when there is at least one byte available in the 128 byte FIFO for the
processor to read.
To write data into the transmit FIFO, the following procedure should be used: With the WRITE
line LOW, the processor places the data on lines D0-D7. The processor then strobes the WRITE
line by bringing it HIGH for a minimum of 50 ns, and then completes the cycle by bringing the
WRITE line back LOW.
To read data from the receive FIFO, the processor drives the RD# line LOW. After a maximum
time of 30 ns, valid data will be driven on lines D0-D7. The processor reads the data and then
drives the RD# line back inactive HIGH.
For USB powered controls, USB power would be fed into Pin 22. The filtered output provided
at Pin 23 would then be tied to Pin 24 (Vcc). This power (+5volts) can be used to power other
circuits in the design, up to the maximum current draw per USB device. For USB specifications
see: www.usb.org/developers.
For System powered controls, +5 volts can be directly fed into Pin 24. Pins 22-23 are left
unconnected. Alternatively system power can be fed into Pin 22. Pin 23 would then be tied to Pin
24 for extra system power filtering. In this case USB power is never connected to the device.
USB power and alternate System power sources should not be tied together, except for
common grounding (GND).
The USB245 is a ‘slave’ or ‘peripheral’ device to a ‘master’ or ‘host’ USB controller such as a
PC running Windows 98/2000. The host must have appropriate drivers running to access the
USB245. Drivers are available for Windows and Mac Systems.
Addition Information
USB Cable color codes: RedÆ 5 Volts, Black Æ GND, Green Æ DP, White Æ DM
Schematic Usage
See appendix for a simple example using the USB245 with the Ubicom SX-28.
Pin Orientation
Pin 1
Vcc
GND
(version 1.0)
Software Drivers Supplied & Supported by: Future Technology Devices International Ltd. (FTDI).
http://www.ftdichip.com


3Pages


USB245 電子部品, 半導体
1
SX28
VCC
VCC
D
C1
GND
READ#
WRITE
RXF#
TXE#
U1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
GND RESET#
RTCC OSC1
VCC OSC2
VCC
RC7
RA0 RC6
RA1 RC5
RA2 RC4
RA3 RC3
RB0 RC2
RB1 RC1
RB2 RC0
RB3 RB7
RB4 RB6
GND
RB5
28 RESET#
27 OSC1
26 OSC2
25 D7
24 D6
23 D5
22 D4
21 D3
20 D2
19 D1
18 D0
17
16
15
SX28AX-SS
GND
PORTB on SX28 for other I/O
C
2
CR1
20 MHz Resonator
31
3
GND
READ#
WRITE
RXF#
TXE#
RESET#
U2
4
5
6
7
8
9
10
11
SD7 VCC
SD6 FILTER_VCC
SD5 USB_VCC
SD4
SD3 DM
SD2 DP
SD1
SD0 RXCLK
16
17
14
18
READ#
WRITE
RXF#
TXE#
15 RESET#
GND
GND
USB245
VCC
24
23
22
21
20
13
19
12
GND
4
D
RED 1
WHITE 2
GREEN 3
BLACK 4
J1
VCC0
DATAO-
DATA0+
GND0 GND
GND
5
C
BS2-IC
U4
B BS2-IC
GND
P0
P1
P2
P3
P4
P5
P6
P7
1
2
3
4
5
6
7
8
9
10
11
12
SOUT VIN
SIN VSS
ATN RES#
VSS VDD
P0 P15
P1 P14
P2 P13
P3 P12
P4 P11
P5 P10
P6 P9
P7 P8
24
23 GND
22
21 VCC
20
19
18
17
16 TXE#
15 RXF#
14 READ#
13 WRITE
A
12
P7
P6
P5
P4
P3
P2
P1
P0
READ#
WRITE
RXF#
TXE#
U3
4
5
6
7
8
9
10
11
SD7 VCC
SD6 FILTER_VCC
SD5 USB_VCC
SD4
SD3 DM
SD2 DP
SD1
SD0 RXCLK
16
17
14
18
READ#
WRITE
RXF#
TXE#
15 RESET#
GND
GND
USB245
VCC
24
23
22
21
20
13
19
12
GND
RED
WHITE
GREEN
BLACK
1
2
3
4
J1
VCC0
DATAO-
DATA0+
GND0 GND
GND
5
B
Title USB245 Demo Schematic
Size
A
Date:
File:
3
Number
5-Dec-2002
C:\Designs\stamps.ddb
Revision
Sheet of
Drawn By:
4
A

6 Page



ページ 合計 : 6 ページ
 
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[ USB245 データシート.PDF ]


データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。


共有リンク

Link :


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Pinout Information

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ETC


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