Model
True USB Willem
GQ-4X
True USB Willem
GQ-3X
EasyPRO90B
VP190/VP280
TOP2007/2005+
PC Interface/data communication
USB
USB
USB
USB
USB
Power supply
USB or AC/DC
auto detection
auto switching
USB or AC/DC
auto detection
auto switching
Must Use AC/DC power adapter
USB or AC/DC power
USB or AC/DC power
Hardware Developer
MCUmall Canada
MCUmall Canada
China
China
China
Software Developer
MCUmall Canada
MCUmall Canada
China
China
China
Free software updates
reqularly
reqularly
Not reqularily
Not reqularily
Not reqularly
Supported Technical Forum
Yes
Yes
None
None
None
Technical Support
Yes
Yes
None
None
None
Work with EPROM
Support 2716 2732 ... old EPROMs
Yes
Yes
No
No
No
Support 25VF series
Yes
Yes (partial)
No
No
No
Support 25LF series
Yes
Yes (partial)
No
No
No
JTAG Support
Yes
No
No
No
No
Fast mode SPI
Yes
No
No
No
No
Altera Xilinx CPLD
Yes
No
No
No
No
Support PLCC84
Yes
No
No
No
No
Support TSOP48 chip
Yes
Yes
No
No
No
Support PSOP44 chip
Yes
Yes
No
No
No
Support 16bit chip
Yes
Yes
No
No
No
Multi-tasking CPU usage
10%
10%
20%
20%
>98%
Support software O/S Window
98SE/Me/XP/NT/2k
Vista
98SE/Me/XP/NT/2k
WindowVista
98SE/Me/XP/NT/2k
WindowVista
98SE/Me/XP/NT/2k
Allow User add device on software
Yes
Yes
No
No
No
Device search
Yes
Yes
Yes
No
Yes
History memory
Yes
Yes
No
No
No
Status
Active
Active
Active
Active
Active
Manufacturer
MCUmall Electronics Inc.
MCUmall Electronics Inc.
ZLG China
Weilei China
TY China