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Cypress Semiconductor Corporation
SL811HS and SL811HST: Application Notes
©2001 Cypress Semiconductor Corporation. All rights reserved. The information
and specifications contained in this document are subject to change without
notice.
Date: 07/26/01
Revision: 1.21
Page: 41
5.2.2 BULK Read
The BULK Read endpoint’s toggle sequence is initialized to DATA0/DATA1 and so on.
USB Trace 11: Bulk Read
To transfer 512-bytes from device to host, it takes 8 IN transactions with a 64-byte data
payload.
PACKET # SYNC IN ADDR ENDP CRC5 EOP IDLE
PACKET # SYNC DATA0 DATA PAYLOAD CRC16 EOP IDLE
PACKET # SYNC ACK EOP IDLE
PACKET # SYNC IN ADDR ENDP CRC5 EOP IDLE
PACKET # SYNC DATA1 DATA PAYLOAD CRC16 EOP IDLE
PACKET # SYNC ACK EOP IDLE
PACKET # SYNC IN ADDR ENDP CRC5 EOP IDLE
PACKET # SYNC DATA0 DATA PAYLOAD CRC16 EOP IDLE
PACKET # SYNC ACK EOP IDLE
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