WTS701MMSLASHT datasheet(47/77 Pages) WINBOND

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WTS701

Publication Release Date: May 2003

- 47 -

Revision 3.09

Command

Byte

Command

Data Byte

SCLK

MOSI

MISO

SSB

Figure 12. Type I SPI Transaction.

Type II – Two Word Transactions that Receive Data

Type II transactions are four byte transactions that read out the byte count register. As these

commands are all Class0, ICMD will never be active and R/ B will never occur.

Command

Byte

Command

Data Byte

Data Byte 0

(even)

Data Byte 1

(odd)

SCLK

MOSI

MISO

SSB

BCNT0

BCNT1

Figure 13. Type II SPI Transaction.

Type III – Transactions that send data

Type III transactions send data to the WTS701. If the data rate exceeds the ability of the WTS701 to

read data from the input FIFO or if the internal data queue becomes full then the R/ B line will

handshake a pause in the SPI transaction. The host can either:

•

Wait for R/ B to return HIGH then continue sending data

•

Terminate the transaction and try sending data later

WTS701MM/T bảng dữ liệu(PDF) 47 Page - Winbond