Rainbow Electronics AT76C551 - Manual (Page 56)

56
AT76C551
1612D–08/01
• Bit 2 R – RMWUPE
Remote Wake-up Enable. This bit is set if the Host enables the function’s remote wake-up
feature.
• Bit 1 R – CONFG
Configured. This bit is set by the firmware after a valid SET_CONFIGURATION request is
received. It is cleared by a reset or by a SET_CONFIGURATION with a value of 0.
• Bit 0 R – FADD Enable: Function Address Enable
This bit is set by firmware after the status phase of a SET_ADRESS request transaction. The
Host will use the new address starting at the next transaction.
Note: Default: 00h
SPRSR: Suspend/Resume Register
addr 50003E8h W 8 bits
• Bits 7..4 – Reserved
• Bit 3 – SOF INT: Start Of Frame Interrupt
• Bit 2 – EXT RSM: Received External Resume
The USB hardware sets this bit to denote an External Resume Interrupt. If RMWUPE = 1, a
RESUME signal is send in USB BUS.
• Bit 1 – RCVD RSM: Received Resume
The USB hardware sets this bit when a USB resume signaling is detected at its port.
• Bit 0 – SUSP: Suspend
The USB hardware sets this bit when it detects no SOF for 3 ms. The USB macro enters in
SUSPEND MODE, the processor has to go in SLEEP mode.
Note: Default: x0h
SPRSIE: Suspend/Resume Interrupt Enable Register
addr 50003E4h R 8 bits
Bits 7..4 – Reserved
• Bit 3 – SOF IE: Enable SOF Interrupt
• Bit 2 – EXTRSM IE: Enable External Resume Signaling Interrupt
1 = Enable
0 = Disable
• Bit 1 – RCVDRSM IE: Enable BUS Resume Signaling Interrupt
1 = Enable
0 = Disable
• Bit 0 – SUSP IE: Enable Suspend Signaling Interrupt
1 = Enable
0 = Disable
Note: Default: x0h
UISR: USB Interrupt Status Register
addr 50003DChW8 bits