Answers Database
SPROMS: Can the VPP/VCC pin be tied through a resistor to +5V?
Record #1420
Product Family: Hardware
Product Line: 1700
Product Part: 1700
Problem Title:
SPROMS: Can the VPP/VCC pin be tied through a resistor to +5V?
Problem Description:
Urgency: standard
General Description:
Can a customer tie the VPP/VCC pin of a XC1700 PROM through
a resistor to +5 Volts?
Customers may want to do this if they are switching between
Xilinx and Atmel PROMs.
Solution 1:
Solution:
Do not use a resistor between VCC and VPP pins on XC1700.
This has severe impacts on speed and data reliability.
Vpp is actually the power supply for the read section.
If a customer is using a resistor between the VCC and
the VPP they should be aware that this will affect the
reliability and speed of the part.
To prevent this problem, tie VPP and VCC directly to +5 Volts.
End of Record #1420 - Last Modified: 07/30/99 19:07 |
