Cypress Semiconductor SL811HS Uživatelský manuál stáhnout pdf (Strana 41)

Cypress Semiconductor Corporation

SL811HS and SL811HST: Application Notes

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

1 2 ... 36 37 38 39 40 41 42 43

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Cypress Semiconductor SL811HS Uživatelský manuál Strana 41