7643 datasheet(398/424 Pages) RENESAS

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7643 Group

REJ09B0133-0200

APPENDIX

3.5 Control registers

Rev.2.00

Aug 28, 2006

page 75 of 98

USB endpoint x OUT write count register

b7 b6 b5 b4 b3 b2 b1 b0

USB endpoint x (x=0 to 2) OUT write count register

(WRT_CNT : address 5D16)

Name

Functions

At reset R W

Contains the number of bytes in endpoint x OUT FIFO.

USB endpoint FIFO mode register

b7 b6 b5 b4 b3 b2 b1 b0

USB endpoint FIFO mode register

(USBFIFOMR : address 5F16)

Name

Functions

At reset R W

For endpoint 1

b3b2b1b0

✕ 0 0 0 : IN 128-byte, OUT 128-byte

For endpoint 2

b3b2b1b0

0 ✕ ✕ ✕ : IN 32-byte, OUT 32-byte

1 ✕ ✕ ✕ : IN 128-byte, OUT 128-byte

FIFO size selection bit

(Note)

Note: The value set into “x” is invalid.

Nothing is arranged for these bits. When these bits are read out, the

contents are undefined. These bits are “0” at write.

Fig. 3.5.47 Structure of USB endpoint x OUT write control register (x = 0 to 2)

Fig. 3.5.48 Structure of USB endpoint FIFO mode register

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