38K2 datasheet(87/358 Pages) RENESAS

87 / 358 page

FUNCTIONAL DESCRIPTION

Rev.2.00

Oct 15, 2006

page 68 of 130

38K2 Group

REJ09B0338-0200

HARDWARE

Fig. 100 Structure of DP2 control register

Fig. 101 Structure of DP2 status register

DSCONN2

DSPTEN2

DSSUSP2

DSDETE2

DSRSTO2

DSRSMO2

DSRMOD2

DSLSPD2

–

DP2 control register (DP2CON) [address 002C16]

Bit name

Bit symbol

At reset

Function

H/W

S/W

Downstream port 2 connect bit

Downstream port 2 enable bit

Downstream port 2 suspend bit

Downstream port 2 connect-

state detection enable bit

Downstream port 2 SE0 signal

transmit bit

Downstream port 2 resume

signal transmit bit

Downstream port 2 bus-state

read mode control bit

Downstream port 2 USB transfer

speed select bit

0 : Disconnect ; PTCON2 interrupt enabled

1 : Connect ; PTDIS2 interrupt enabled

0 : Downstream port 2 disabled

1 : Downstream port 2 enabled ; This bit is cleared when

an interrupt of PTDIS2 or PTERR2 is generated.

0 : No port suspended

1 : Port suspended; This bit is cleared when an interrupt

of PTDIS2 or PTRSM2 is generated.

0 : Connect-state detection disabled ; PTCON2 and PTDIS2

interrupts disabled

1 : Connect-state detection enabled ; This bit is cleared when an

interrupt of PTCON2, PTDIS2 or PTERR2 is generated.

0 : Being not output

1 : SE0 signal being output

0 : Being not output

1 : K-signal being output ; When writing “0”, a low-speed

EOP is output and then a transition to being not

output occurs.

0 : Mode where a downstream port 2 bus-state is read,

using RD signal

1 : Mode where a downstream port 2 bus-state is read,

using EOF2 signal (internal signal)

0 : Full-speed mode (12MHz)

1 : Low-speed mode (1.5 MHz)

–: State remaining

D2MINUS

D2PLUS

b7:b2

DP2 status register (DP2STS) [address 002D16]

Bit name

Bit symbol

At reset

Function

H/W

S/W

–: State remaining

D2- signal bit

D2+ signal bit

Not used

In-

definite

In-

definite

–

In-

definite

In-

definite

–

In DSRMOD2 = “0”, a downstream port 2 bus-state is

read, using RD signal.

In DSRMOD2 = “1”, a downstream port 2 bus-state is

read, using EOF2 signal (internal signal).

In DSRMOD2 = “0”, a downstream port 2 bus-state is

read, using RD signal.

In DSRMOD2 = “1”, a downstream port 2 bus-state is

read, using EOF2 signal (internal signal).

Write “0” when writing.

“0” is read when reading.

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