EZ-USB Datasheet, PDF (231/334 Pages) Cypress Semiconductor – The EZ-USB USB Integrated Circuit

USBCS
b7
b6
WAKESRC
-
R/W
R
0
0
USB Control and Status
7FD6
b5
b4
b3
b2
-
-
DISCON DISCOE
R
R
R/W
R/W
0
0
0
1
Figure 12-31. USB Control and Status Registers
b1
b0
RENUM SIGRSUME
R/W
R/W
0
0
Bit 7:
WAKESRC Wakeup source
This bit indicates that a high to low transaction was detected on the WAKEUP# pin. Writ-
ing a “1” to this bit resets it to “0.”
Bit 3:
DISCON Signal a Disconnect on the DISCON# pin
The EZ-USB DISCON# pin reflects the complement of this bit. This bit is normally set to
0 so that the action of the DISCOE bit (below) either floats the DISCON# pin or drives it
HI.
Bit 2:
DISCOE Disconnect Output Enable
DISCOE controls the output buffer on the DISCON# pin. When DISCOE=0, the pin
floats, and when DISCOE=1, it drives to the complement of the DISCON bit (above).
DISCOE is used in conjunction with the RENUM bit to perform ReNumeration™ (Chap-
ter 5, "EZ-USB Enumeration and ReNumeration™").
Page 12-38
Chapter 12. EZ-USB Registers
EZ-USB TRM v1.9