AN2131SC Cypress Semiconductor Corp, AN2131SC Datasheet - Page 216

• 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 Endpoint Interrupt Enable registers define which endpoints have active interrupts.
They do not affect the endpoint action, only the generation of an interrupt in response to
endpoint events.
When the IEN bit for an endpoint is “0,” the interrupt request bit for that endpoint is
ignored, but saved. When the IEN bit for an endpoint is “1,” any IRQ bit equal to “1” gen-
erates an 8051 INT2 request.
EZ-USB TRM v1.9
IN07EN
OUT07IEN
Note
The INT2 interrupt (EIE.0) and the 8051 global interrupt enable (EA) must be enabled
for the endpoint interrupts to propagate to the 8051. Once the INT2 interrupt is active, it
must be cleared by software.
OUT7IEN
IN7IEN
R/W
R/W
b7
b7
0
x
OUT6IEN
IN6IEN
R/W
R/W
b6
b6
0
x
OUT5IEN
Figure 12-19. IN/OUT Interrupt Enable Registers
IN5IEN
Endpoint 0-7 OUT Interrupt Enables
Endpoint 0-7 IN Interrupt Enables
R/W
R/W
b5
b5
0
x
Chapter 12. EZ-USB Registers
OUT4IEN
IN4IEN
R/W
R/W
b4
b4
0
x
OUT3IEN
IN3IEN
R/W
R/W
b3
b3
0
x
OUT2IEN
IN2IEN
R/W
R/W
b2
b2
0
x
OUT1IEN
IN1IEN
R/W
R/W
b1
b1
0
x
OUT0IEN
IN0IEN
Page 12-23
R/W
R/W
7FAC
b0
7FAD
b0
0
x