Answers Database
XCHECKER: Is the HW-XCH3V adapter necessary with 3.3V XL or L devices?
Record #275
Problem Title:
XCHECKER: Is the HW-XCH3V adapter necessary with 3.3V XL or L devices?
Problem Description:
Urgency: Standard
General Description: The 3V X-Checker Adapter, HW-XCH3V, is
specified to be used in 3 Volt Systems. However, since the "XL"
is 3.3V native and 5V tolerant, can the user go without using
the adapter? How the "L" devices?
Solution 1:
XL devices:
A 3V adaptor is needed because the XL device should not see a 5V Vcc
for reliability reasons. If the power supply is separated from the
Xchecker cable, then it should post no problem to use the cable
without the adaptor because all XL I/O's are 5V tolerant. Basically,
the Xchecker cable still requires a 5v source unless it has the 3V
adapter.
L devices:
See Xilinx Solution 1297 for details of using 2000L, 3000L,4000L, or
5200L devices with the Xchecker cable.
See Xilinx Solution 1907 for details of 3.3V devices and their 5V
counterparts.
End of Record #275 - Last Modified: 10/07/97 14:14 |
