H8SSLASH2218 datasheet(541/750 Pages) RENESAS

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Section 14 Universal Serial Bus (USB)

Rev.6.00 Jun. 03, 2008 Page 493 of 698

REJ09B0074-0600

14.3.31

Extended Module Stop Register (EXMDLSTP)

Bit

Bit Name

Initial Value

R/W

Description

7 to 2 —

Undefined

—

Reserved

These bits are always read as an undefined value and

cannot be modified.

RTCSTOP

R/W

RTC Module Stop

0: Cancels the RTC module stop.

1: Sets the RTC module stop.

USBSTOP1 0

R/W

USB Module Stop 1

0: Cancels the stop state of the USB module partly.

A clock is provided for the USB module partly. After

this bit has been cleared, only the UCTLR and

UIER3 registers in the USB module can be

accessed. To access the other registers, clear the

MSTPB0 bit in MSTPCRB to 0.

1: Places the USB module completely in the stop state.

The clocks in the USB module stop operation

completely. However, register values in the USB

module are maintained.

Notes: 1. For details on USB module stop mode cancellation procedure, refer to section 14.5,

Communication Operation.

2. When reading pin states using the port D register (PORTD), after accessing

EXMDLSTP (address range: H'FFFF40 to H'FFFF5F), you must perform a dummy read

to the external address space (such as H'FFEF00 to H'FF7FF) outside the range

H'FFFF40 to H'FFFF5F before reading PORTD.

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