38K2 datasheet(68/151 Pages) RENESAS

68 / 151 page

38K2 Group

Rev.3.00

Oct 15, 2006

page 68 of 147

REJ03B0193-0300

Fig. 102 Structure of Downstream port control register

PCON1

[1:0]

PCON2

[1:0]

b7:b4

–

Downstream port control register (DPCTL) [address 0FF916]

Bit name

Bit symbol

At reset

Function

H/W

S/W

Downstream port 1 function

select bit

Downstream port 2 function

select bit

Not used

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.

–: State remaining

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