38K2 Datasheet, PDF (33/151 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

38K2 Group
b7
b0
0
USB function address register (USBA0) [address 001216]
Bit symbol
Bit name
USBADD0 USB function address bit
[6:0]
b7
Not used
Fig. 33 Structure of USB function address register
Function
In AD0E = “0”, this value changes after writing.
At reset
RW
H/W S/W
0 0 OO
In AD0E = “1”, this value changes after completion of
SET_ADDRESS control transferring.
Write “0” when writing.
– – OO
“0” is read when reading.
–: State remaining
b7
b0
0
USB HUB address register (USBA1) [address 001316]
Bit symbol
Bit name
USBADD1 USB HUB address bit
[6:0]
b7
Not used
Fig. 34 Structure of USB HUB address register
Function
In AD1E = “0”, this value changes after writing.
At reset
RW
H/W S/W
0 0 OO
In AD1E = “1”, this value changes after completion of
SET_ADDRESS control transferring.
Write “0” when writing.
– – OO
“0” is read when reading.
–: State remaining
b7
b0
Frame number register Low (FNUML) [address 001416]
Bit symbol
Bit name
FNUM
[7:0]
Frame number low bit
Function
The frame number is updated at SOF reception.
At reset _{R W}
H/W S/W
In- In- O ✕
definite definite
Fig. 35 Structure of Frame number register Low
b7
0 0000
b0
Frame number register High (FNUMH) [address 001516]
Bit symbol
Bit name
FNUM
[10:8]
b7:b3
Frame number high bit
Not used
Fig. 36 Structure of Frame number register High
Function
The frame number is updated at SOF reception.
Write “0” when writing.
“0” is read when reading.
At reset _{R W}
H/W S/W
In- In- _{O ✕}
definite definite
–
– _OO
–: State remaining
Rev.3.00 Oct 15, 2006 page 33 of 147
REJ03B0193-0300