38K2 datasheet(53/358 Pages) RENESAS

53 / 358 page

FUNCTIONAL DESCRIPTION

Rev.2.00

Oct 15, 2006

page 34 of 130

38K2 Group

REJ09B0338-0200

HARDWARE

Fig. 33 Structure of USB function address register

Fig. 34 Structure of USB HUB address register

Fig. 35 Structure of Frame number register Low

Fig. 36 Structure of Frame number register High

USB function address bit

Not used

USBADD0

[6:0]

–

USB function address register (USBA0) [address 001216]

Bit name

Bit symbol

At reset

Function

H/W

S/W

–: State remaining

In AD0E = “0”, this value changes after writing.

In AD0E = “1”, this value changes after completion of

SET_ADDRESS control transferring.

Write “0” when writing.

“0” is read when reading.

USB HUB address bit

Not used

USBADD1

[6:0]

–

USB HUB address register (USBA1) [address 001316]

Bit name

Bit symbol

At reset

Function

H/W

S/W

–: State remaining

In AD1E = “0”, this value changes after writing.

In AD1E = “1”, this value changes after completion of

SET_ADDRESS control transferring.

Write “0” when writing.

“0” is read when reading.

Frame number low bit

FNUM

[7:0]

In-

definite

In-

definite

Frame number register Low (FNUML) [address 001416]

The frame number is updated at SOF reception.

Bit name

Bit symbol

At reset

Function

H/W

S/W

O ✕

FNUM

[10:8]

b7:b3

Frame number register High (FNUMH) [address 001516]

In-

definite

–

In-

definite

–

Bit name

Bit symbol

At reset

Function

H/W

S/W

Frame number high bit

Not used

The frame number is updated at SOF reception.

Write “0” when writing.

“0” is read when reading.

–: State remaining

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