AN2131QC Cypress Semiconductor Corp, AN2131QC Datasheet - Page 217

• 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

* AN2122/AN2126 only.
USBIEN bits gate the interrupt request to the 8051 for USB reset, suspend, SETUP token,
start of frame, and SETUP data available.
Bit 5:
This bit is in the AN2122 and AN2126 versions only. The 8051 sets this bit to enable the
IN-bulk-NAK interrupt. This interrupt occurs when the host sends an IN token to a bulk
IN endpoint which has not been armed by the 8051 writing its byte count register. Indi-
vidual enables and requests (per endpoint) are controlled by the IBNIRQ and IBNIEN reg-
isters (7FB0, 7FB1).
Bit 4:
This bit is the interrupt mask for the URESIR bit. When this bit is “1,” the interrupt is
enabled, when it is “0,” the interrupt is disabled.
Bit 3:
This bit is the interrupt mask for the SUSPIR bit. When this bit is “1,” the interrupt is
enabled, when it is “0,” the interrupt is disabled.
Bit 2:
This bit is the interrupt mask for the SUTOKIR bit. When this bit is “1,” the interrupt is
enabled, when it is “0,” the interrupt is disabled.
Page 12-24
USBIEN
R/W
b7
0
-
IBNIE
URESIE
SUSPIE
SUTOKIE
R/W
b6
0
-
IBNIE*
Figure 12-20. USB Interrupt Enable Register
R/W
b5
0
IN bulk NAK Interrupt Enable
USB Reset Interrupt Enable
USB Suspend Interrupt Enable
SETUP Token Interrupt Enable
USB Interrupt Enable
Chapter 12. EZ-USB Registers
URESIE
R/W
b4
0
SUSPIE
R/W
b3
0
SUTOKIE
R/W
b2
0
SOFIE
R/W
b1
0
EZ-USB TRM v1.9
SUDAVIE
R/W
b0
7FAE
0