M30245FCGP 데이터 시트보기 (PDF) - Renesas Electronics

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M30245FCGP

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Renesas Electronics 

M30245 Group

Usage Notes

EP0 Interrupt

Step #1

No

OUT_BUF_RDY = 1?

Yes

Step #2

Yes

SETUP_END = 1?

Step #3

No

Read packet data

Read # of data bytes equal to EP0 ‘Receive Byte

Count’ (i.e., EP0WC 7-0) from EP0 OUT FIFO .

No

Final packet of Control

Write Transfer?

Yes

Step #4_0

Yes

SETUP_END = 1?

No

CLR_OUT_BUF_RDY = 1

CLR_SETUP = 1 (if SETUP is set)

SET_DATA_END = 1

Step #4_1

No

SETUP_END = 1?

Step #5_0

Yes

SETUP_END = 1?

No

CLR_OUT_BUF_RDY = 1

CLR_SETUP = 1 (if SETUP is set)

Step #5_1

No

Yes

SETUP_END = 1?

Yes

SEND_STALL = 1

Wait for EP0 Interrupt.

Step #6_0

OUT_BUF_RDY = 1?

No

&

SETUP = 1?

Yes

Step #6_1

Yes

SETUP_END = 1?

No

CLR_OUT_BUF_RDY = 1

CLR_SETUP = 1

CLR_OUT_BUF_RDY = 1

CLR_SETUP = 1 (if SETUP is set)

CLR_SETUP_END = 1

SEND_STALL = 1

CLR_OUT_BUF_RDY = 1

CLR_SETUP = 1

Figure 1.212. USB Programming Note 2 Flowchart

Rev.2.00 Oct 16, 2006 page 261 of 264

REJ03B0005-0200

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