AR# 7709: 2.1i Virtex Map - MAP uses the incorrect JF setting for a CLKDLLHF
2.1i Virtex Map - MAP uses the incorrect JF setting for a CLKDLLHF
Keywords: JF MAP
Urgency : Standard
General Description: A high freqency DLL should have a JF (jitter) setting of 0xFFF0. A regular DLL shoulf have a JF setting of 0xC080. Instances have been seen where MAP assigns a CLKDLLHF 0xC080 instead of 0xFFF0 even though it is checked as High Frequency in FPGA Editor.