Rainbow Electronics AT89C5131 - Manual (Page 135)

135
AT89C5131
4136A–USB–03/03
Table 85. USBIEN Register
USBIEN (S:BEh)
USB Global Interrupt Enable Register
Reset Value = 10h
Table 86. USBADDR Register
USBADDR (S:C6h)
USB Address Register
Reset Value = 80h
7 6 5 4 3 2 1 0
- - EWUPCPU EEORINT ESOFINT - - ESPINT
Bit Number Bit Mnemonic Description
7-6 -
Reserved
The value read from these bits is always 0. Do not set these bits.
5 EWUPCPU
Enable Wake Up CPU Interrupt
Set this bit to enable Wake Up CPU Interrupt. (See “USBIEN Register
USBIEN (S:BEh) USB Global Interrupt Enable Register” on page 135)
Clear this bit to disable Wake Up CPU Interrupt.
4 EEOFINT
Enable End Of Reset Interrupt
Set this bit to enable End Of Reset Interrupt. (See “USBIEN Register USBIEN
(S:BEh) USB Global Interrupt Enable Register” on page 135). This bit is set
after reset.
Clear this bit to disable End Of Reset Interrupt.
3 ESOFINT
Enable SOF Interrupt
Set this bit to enable SOF Interrupt. (See “USBIEN Register USBIEN (S:BEh)
USB Global Interrupt Enable Register” on page 135).
Clear this bit to disable SOF Interrupt.
2-1 -
Reserved
The value read from these bits is always 0. Do not set these bits.
0 ESPINT
Enable Suspend Interrupt
Set this bit to enable Suspend Interrupts (see the “USBIEN Register USBIEN
(S:BEh) USB Global Interrupt Enable Register” on page 135).
Clear this bit to disable Suspend Interrupts.
7 6 5 4 3 2 1 0
FEN UADD6 UADD5 UADD4 UADD3 UADD2 UADD1 UADD0
Bit Number
Bit
Mnemonic Description
7 FEN
Function Enable
Set this bit to enable the function. FADD is reset to 1.
Cleared this bit to disable the function.
6-0 UADD[6:0]
USB Address
This field contains the default address (0) after power-up or USB bus reset.
It will be written with the value set by a SET_ADDRESS request received by the
device firmware.