AN2131SC Cypress Semiconductor Corp, AN2131SC Datasheet - Page 166

• Manufacturer Part Number: AN2131SC
• Description: IC MCU 8051 8K RAM 24MHZ 44QFP
• Manufacturer: Cypress Semiconductor Corp
• Series: EZ-USB®r

Specifications of AN2131SC

• 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: 16
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 44-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 428-1306; AN2131SC

The 8051 reads the RESUME interrupt request bit in EICON.4, and clears the interrupt
request by writing a zero to EICON.4.
EZ-USB TRM v1.9
tb
Resume_isr:
EICON.5
clr
reti
; enable Resume interrupt
EICON.4
Chapter 9. EZ-USB Interrupts
; clear the 8051 W/U
; interrupt request
Page 9-3