EZ-USB TRM v1.9 Chapter 12. EZ-USB Registers Page 12-47
Bit 2: WPOL FWR# Pulse Polarity
The 8051 sets WPOL=0 for active-low FWR# pulses, and WPOL=1 for active high
FWR# pulses.
Bit 1-0: WMOD FWR# Pulse Mode
These bits select the phasing and width of the FWR# pulse. See Figure 8-11.
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