AN2131QC Cypress Semiconductor Corp, AN2131QC Datasheet - Page 240

• Manufacturer Part Number: AN2131QC
• Description: IC MCU 8051 8K RAM 24MHZ 80BQFP
• Manufacturer: Cypress Semiconductor Corp
• Series: EZ-USB®r

Specifications of AN2131QC

• Applications: USB Microcontroller
• Core Processor: 8051
• Program Memory Type: ROMless
• Controller Series: AN213x
• Ram Size: 8K x 8
• Interface: I²C, USB
• Number Of I /o: 24
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 80-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 428-1307

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