38K2 Datasheet, PDF (68/151 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

38K2 Group
b7
0 0 00
b0
Downstream port control register (DPCTL) [address 0FF916]
Bit symbol
Bit name
PCON1
[1:0]
Downstream port 1 function
select bit
PCON2
[1:0]
Downstream port 2 function
select bit
b7:b4
Not used
Function
b1b0
0 0 : USB port (D1-, D1+) OFF,
USB difference amplifier OFF
0 1 : USB exclusive input port (D1-, D1+),
USB difference amplifier OFF
1 0 : Full-speed port (D1-, D1+),
USB difference amplifier ON
1 1 : Low-speed port (D1-, D1+),
USB difference amplifier ON
b3b2
0 0 : USB port (D2-, D2+) OFF,
USB difference amplifier OFF
0 1 : USB exclusive input port (D2-, D2+),
USB difference amplifier OFF
1 0 : Full-speed port (D2-, D2+),
USB difference amplifier ON
1 1 : Low-speed port (D2-, D2+),
USB difference amplifier ON
Write “0” when writing.
“0” is read when reading.
Fig. 102 Structure of Downstream port control register
At reset _{R W}
H/W S/W
0 – OO
0 – OO
– – OO
–: State remaining
Rev.3.00 Oct 15, 2006 page 68 of 147
REJ03B0193-0300