AN2131-DK001 Cypress Semiconductor Corp, AN2131-DK001 Datasheet - Page 167

• Manufacturer Part Number: AN2131-DK001
• Description: KIT EZ-USB DEVELOPMENT BOARD
• Manufacturer: Cypress Semiconductor Corp

Specifications of AN2131-DK001

• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 428-1333

Figure 9-2 shows the 21 USB requests that share the 8051 USB (INT2) interrupt. The bot-
tom IRQ, EP7-OUT, is expanded in the diagram to show the logic associated with each
USB interrupt request. Vector 05, not shown in the diagram, exists only in the AN2122/
AN2126, and is described later in this chapter.
Page 9-4
9.4
USB Signaling Interrupts
0C
0D
00
01
02
03
04
05
06
07
08
09
0A
0B
0E
0F
10
11
12
13
14
15
SUDAV
SOF
SUTOK
SUSP
URES
IBN Int
EP0-IN
EP0-OUT
EP1-IN
EP1-OUT
EP2-IN
EP2-OUT
EP3-IN
EP3-OUT
EP4-IN
EP4-OUT
EP5-IN
EP5-OUT
EP6-IN
EP6-OUT
EP7-IN
EP7-OUT
IN07IRQ.7(1)
AVEC
OUT07IEN.7
Interrupt Request Latch
0
IV4
EZ-USB
S
R
IV3
Figure 9-2. USB Interrupts
Chapter 9. EZ-USB Interrupts
IV2
IV1
IN07IRQ.7 (rd)
8051
IV0
EXIF.4(0)
0
R
S
0
EIE.0
EXIF.4(rd)
8051 "USB"
Interrupt
EZ-USB TRM v1.9