FT220XS-U FTDI, FT220XS-U Datasheet - Page 38

• Manufacturer Part Number: FT220XS-U
• Description: USB Interface IC USB to 4 bit SPI / FT1248 IC SSOP-16
• Manufacturer: FTDI

Specifications of FT220XS-U

• Rohs: yes
• Tradename: X-Chip

FT220X USB 4-BIT SPI/FT1248 IC Datasheet
Version 1.2
Document No.: FT_000629 Clearance No.: FTDI# 262
Reading
As with the writing process, the first part of the communication for a read sets the address. The read will
then be initiated when the FT1248 slave receives an MTP memory read command. The status during the
command phase indicates whether or not the MTP memory shall be able to service the read request. If it
is possible to carry out the read, the FT1248 moves into the data phase where it can either continue with
the read transaction until the slave successfully returns an ACK along with the data or if it receives NAK
during the data phase it can abort the read transfer and try again. When the read has been serviced the
st
data shall be returned on the 1
data byte phase.
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