•
•
•
The function address is reset to zero (13).
The configuration is reset to zero (19).
Alternate settings are reset to zero (20).
10.7 Reset Summary
Table 10-4. Effects of Various EZ-USB Resets (“U” Means “Unaffected”)
Resource RESET pin USB Bus Reset Disconnect 8051 Reset
8051 Reset
reset
unarm
unarm
reset
reset
reset
reset
run
U
unarm
U
U
unarm
arm
U
N/A
EP0-7 IN EPs
EP0-7 OUT EPs
Breakpoint
unarm
unarm/arm
U
reset
U
Stall Bits
U
reset
U
Interrupt Enables
Interrupt Reqs
CLK24
U
reset
U
U
U
U
U
U
Data Toggles
Function Address
Configuration
ReNum
reset
reset
0
reset
reset
0
reset
reset
0
U
U
U
0
U
U
U
Table 10-4 summarizes the effects of the four EZ-USB resets.
Note
The I2C controller is not reset for any of the conditions laid out in Table 10-4. Only the
EZ-USB RESET pin resets it.
Page 10-8
Chapter 10. EZ-USB Resets
EZ-USB TRM v1.9
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