Omega Webcam OM-USB-1208FS Manual De Usuario
OM-USB-1208FS User's Guide
Specifications
26
Input low voltage
1.0 V max, –0.5 V absolute min
Note 8:
CTR is a Schmitt trigger input protected with a 1.5K Ω series resistor.
Non-volatile memory
Table 15. Non-volatile memory specifications
EEPROM
1,024 bytes
EEPROM Configuration
Address Range
Access
Description
0x000-0x07F
Reserved
128 bytes system data
0x080-0x1FF
Read/write
384 bytes cal data
0x200-0x3FF
Read/write
512 bytes user area
Microcontroller
Table 16. Microcontroller specifications
Type
High performance 8-bit RISC microcontroller
Program Memory
16,384 words
Data Memory
2,048 bytes
Power
Table 17. Power specifications
Parameter
Conditions
Specification
Supply current (Note 9)
80 mA
+5V USB power available (Note 10)
Connected to self-powered hub
Connected to externally-powered root port hub
4.5 V min, 5.25 V max
Connected to bus-powered hub
4.1 V min, 5.25 V max
Output current (Note 11)
Connected to self-powered hub
Connected to externally-powered root port hub
420 mA max
Connected to bus-powered hub
20 mA max
Note 9:
This is the total current requirement for the OM-USB-1208FS which includes up to 10 mA for
the status LED.
the status LED.
Note 10:
Self-powered hub refers to a USB hub with an external power supply. Self-powered hubs allow
a connected USB device to draw up to 500 mA.
Root port hubs reside in the PC’s USB host controller. The USB port(s) on your PC are root port
hubs. All externally powered root port hubs (desktop PCs) provide up to 500 mA of current for
a USB device. Battery-powered root port hubs provide 100 mA or 500 mA, depending upon the
manufacturer. A laptop PC that is not connected to an external power adapter is an example of a
battery-powered root port hub.
Bus powered hubs receive power from a self-powered or root port hub. In this case the
maximum current available from the USB +5 V is 100 mA. The minimum USB +5 V voltage
level can be as low as 4.1 V.
a connected USB device to draw up to 500 mA.
Root port hubs reside in the PC’s USB host controller. The USB port(s) on your PC are root port
hubs. All externally powered root port hubs (desktop PCs) provide up to 500 mA of current for
a USB device. Battery-powered root port hubs provide 100 mA or 500 mA, depending upon the
manufacturer. A laptop PC that is not connected to an external power adapter is an example of a
battery-powered root port hub.
Bus powered hubs receive power from a self-powered or root port hub. In this case the
maximum current available from the USB +5 V is 100 mA. The minimum USB +5 V voltage
level can be as low as 4.1 V.
Note 11:
This refers to the total amount of current that can be sourced from the USB +5 V, analog outputs
and digital outputs.
and digital outputs.