TTControl Vision 307 - USB Host Interface; Pinout; Functional Description; Maximum Ratings

6. SPECIFICATION OF INPUTS AND OUTPUTS
6.8 USB Host interface
Supported by Vision 307Plus products.
6.8.1 Pinout
Connector Pin no./Shield Function
D 1 USB D+
D 2 USB V
bus
D 3 USB D-
D 4 USB GND
D Shield USB SHIELD
6.8.2 Functional description
The USB Host interface is compliant with the USB 2.0 standard.
Be sure to use an appropriate cable for the USB connection. For the USB data lines, a twisted pair connec-
tion must be used. In a noisy environment the data line pair should be shielded separately. In this case,
connect the cable shielding to USB shield.
If the USB interface is used to connect a removable device, provide a connector compliant with the USB
standard. This ensures that the pins of the USB interface are connected in the correct order (first shield,
then ground (GND), then V
bus
, then the data lines), thus preventing the interface from getting damaged.
For power supply below 7.5 V, see section 6.1.2.1.
6.8.3 Maximum ratings
Symbol Parameter Note Min Max Unit
L
max
Maximum cable length 1, 2 5 m
V
usb
Maximum voltage on V
bus
, D+, and D- -0.5 5.5 V
I
max
Maximum current on V
bus
500 mA
I
off
Overcurrent protection on V
bus
500 620 mA
V
in-CMM
Input common mode range DC or AC-peak with line fre-
quency (max 60Hz)
3 -0.05 0.5 V
V
in-CMM
Input common mode range DC or AC-peak with line fre-
quency (max 60Hz)
4 0.8 2.5 V
Note 1 The maximum cable length depends on the type of cable used, the number of connec-
tors between the devices, the environment the cable is installed, as well as the USB
transmission speed mode used. As a rule of thumb, each connector pair decreases the
maximum cable length by 0.5 meters if a USB conform connector is used. If an arbitrary
connector is used, the length penalty will be higher.
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Proprietary Information
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Document Number:
D-156-G-02-003