38K0 datasheet(59/328 Pages) RENESAS

59 / 328 page

FUNCTIONAL DESCRIPTION

Rev.2.00

Oct 05, 2006

page 42 of 112

38K0 Group

REJ09B0337-0200

HARDWARE

Fig. 51 Structure of EP01 byte number register 0

B0BYT01

[6:0]

–

EP01 byte number register 0 (EP01BYT0) [address 001E16]

Bit name

Bit symbol

At reset

Function

H/W

S/W

IN : Transmit byte number bit

OUT : Receive byte number bit

Not used

–: State remaining

Single buffer mode: Set the transmitting byte number.

Double buffer mode : Set the transmitting byte number

of buffer 0.

Single buffer mode : The received byte number is

automatically set.

Double buffer mode : The received byte number of buffer 0

is automatically set.

Write “0” when writing.

“0” is read when reading.

B1BYT01

[6:0]

–

EP01 byte number register 1 (EP01BYT1) [address 001F16]

Bit name

Bit symbol

At reset

Function

H/W

S/W

IN : Transmit byte number bit

OUT : Receive byte number bit

Not used

–: State remaining

Single buffer mode: These bits are invalid.

Double buffer mode : Set the transmitting byte number

of buffer 1.

Single buffer mode: These bits are invalid.

Double buffer mode : The received byte number of buffer 1

is automatically set.

Write “0” when writing.

“0” is read when reading.

Fig. 52 Structure of EP01 byte number register 1

MXPS01

[6:0]

EP01 MAX. packet size register (EP01MAX) [address 0FEC16]

–

Bit name

Bit symbol

At reset

Function

H/W

S/W

–: State remaining

Max. packet size bit

Not used

IN : These bits are invalid.

OUT : Set the maximum packet size.

Write “0” when writing.

“0” is read when reading.

Fig. 53 Structure of EP01 MAX. packet size register

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