38K2 Datasheet, PDF (36/151 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

38K2 Group
b7
0 0000
b0
Endpoint index register (USBINDEX) [address 001816]
Bit symbol
Bit name
EPIDX [1:0] Endpoint index bit
ADIDX
b7:b3
Address index bit
Not used
Function
b1 b0
0 0 : Endpoint 0
0 1 : Endpoint 1
1 0 : Endpoint 2
1 1 : Endpoint 3
0 : USB function
1 : USB HUB
Write “0” when writing.
“0” is read when reading.
Fig. 39 Structure of Endpoint index register
At reset _{R W}
H/W S/W
0 – _OO
0 – _OO
– – _OO
–: State remaining
Rev.3.00 Oct 15, 2006 page 36 of 147
REJ03B0193-0300