SH7721 datasheet(857/1524 Pages) RENESAS

857 / 1524 page

Section 24

USB Host Controller (USBH)

Rev. 3.00 Jan. 18, 2008 Page 795 of 1458

REJ09B0033-0300

Bit

Bit Name

Initial

Value

R/W

Description

(Read) Port Reset Status

When this bit is set by writing to SetPortReset, the port

reset signal is output. This bit is cleared when PRSC is set

upon completion of a reset. When the CCS is cleared, this

bit is not set.

0: Port reset signal is not active

1: Port reset signal is active

PRS

R/W

(Write) Set Port Reset

Writing a 1 sets PortReset signal. Writing a 0 has no

effect. When the CCS bit is cleared, this write does not set

the PRS bit, instead, sets the CSC bit. This reports a reset

of the power disconnection port to the driver.

(Read) Port Over Current Indicator

This bit is valid only when a root hub is placed in such a

way that an over-current condition is reported on the base

of each port. If the over-current report at each port is not

supported, this bit is cleared to 0. If this bit is cleared, all

power controls are normal in this port. If this bit is set, an

over-current status exists in this port. This bit always

reflects an over-current input signal.

0: No over-current condition

1: Over-current condition is detected

POCI

R/W

(Write) Clear Suspend Status

Writing a 1 initiates a resume. Writing a 0 has no effect. If

the PSS bit is set, a resume is initiated.

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