M38K09RFS datasheet(281/328 Pages) RENESAS

281 / 328 page

3.4 List of registers

Rev.2.00

Oct 05, 2006

page 40 of 89

38K0 Group

REJ09B0337-0200

APPENDIX

Fig. 3.4.5 Structure of USB function address register

USB function address bit

Not used

USBADD0

[6:0]

–

USB function address register (USBA0) [address 001216]

Bit name

Bit symbol

At reset

Function

H/W

S/W

–: State remaining

In AD0E = “0”, this value changes after writing.

In AD0E = “1”, this value changes after completion of

SET_ADDRESS control transferring.

Write “0” when writing.

“0” is read when reading.

Fig. 3.4.3 Structure of USB control register

Fig. 3.4.4 Structure of USB function enable register

At reset

Function

Bit name

Bit symbol

Remote wakeup bit

TrON output control bit

TrON output enable bit

USB reference voltage control bit

USB reference voltage enable bit

USB difference input enable bit

USB clock select bit

USB module operation enable bit

WKUP

TRONCON

TRONE

VREFCON

VREFE

USBDIFE

UCLKCON

USBE

–

USB control register (USBCON) [address 001016]

–: State remaining

0 : Returning to BUS idle state by writing “1” first and

then “0”. (Remote wakeup signal)

1 : K-state output

0 : “L” output mode (valid in TRONE = “1”)

1 : “H” output mode (valid in TRONE = “1”)

0 : TrON port output disabled (Hi-Z state)

1 : TrON port output enabled

0 : Normal mode (valid in VREFE = “1”)

1 : Low current mode (valid in VREFE = “1”)

0 : USB reference voltage circuit operation disabled

1 : USB reference voltage circuit operation enabled

0 : Upstream-port difference input circuit operation disabled

1 : Upstream--port difference input circuit operation enabled

0 : External oscillating clock f(XIN)

1 : PLL circuit output clock fVCO

0 : USB module reset

1 : USB module operation enabled

H/W

S/W

Bit name

Bit symbol

USB function enable bit

Not used

AD0E

b7:b1

–

USB function enable register (USBAE) [address 001116]

0: USB function address register invalidated

1: USB function address register validated

Write “0” when writing.

“0” is read when reading.

At reset

Function

H/W

S/W

–: State remaining

000

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