MC68HC908LD64 Datasheet, PDF (197/362 Pages) Freescale Semiconductor, Inc – Microcontrollers

Universal Serial Bus Module (USB)
Hub Function I/O Registers
To indicate the end of the resume, a low-speed EOP signal will be
followed when this control bit changes from 1 to 0. Reset clears this
bit.
1 = Force downstream port data lines to K state
0 = Default
SUSPx — Downstream Port Selective Suspend Bit
This read/write bit forces the downstream port entering the selective
suspend mode. This bit can be set by the host request SetPortFeature
(PORT_SUSPEND) only. When this bit is set, the hub prevents
propagating any bus activity (except the port reset or port resume
request or the global reset signal) downstream, and the port can only
reflect upstream bus state changes via the endpoint 1 of the hub. The
blocking occurs at the next EOF2 point when this bit is set. Reset
clears this bit.
1 = Force downstream port enters the selective suspend mode
0 = Default
Dx+, Dx– — Downstream Port Differential Data
These read-only bits are the differential data shown on the hub
downstream ports. When the SUSPND bit is 0 in the HRPCR register,
the data is the latched state at the last EOF2 sample point. When the
SUSPND bit is 1, the data reflects the current state on the data line
while accessing this register.
MC68HC908LD64 — Rev. 3.0
Freescale Semiconductor
Universal Serial Bus Module (USB)
Data Sheet
197