FT201XS-R datasheet(34/49 Pages) FTDI

부품명	FT201XS-R

상세설명	FT201X USB I2C SLAVE IC

PDF	49 Pages

Scroll/Zoom	100%

제조업체	FTDI [Future Technology Devices International Ltd.]

홈페이지	http://www.ftdichip.com

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34 / 49 page

FT201X USB I2C SLAVE IC Datasheet

Version 1.4

Document No.: FT_000627 Clearance No.: FTDI# 264

Further details of these states can be found in Chapter 9 of the USB 2.0 Specification from the USB

Implementers Forum website (http://www.usb.org).

Figure 9.6: Checking the USB State

Device ID command

This command uses the Slave address of the FT-X. The master issues the 1111 100 0 command (0x7c

write) followed by the slave address with the direction bit as either 0 or 1 (don’t care). The master then

sends a repeated start followed by the 1111 100 1 command (0x7c read). The FT-X responds with 3

bytes containing the manufacturer ID (12 bits), part ID (9 bits) and revision (3 bits). The master ends

reading with a NACK.

Note: In the case where the master keeps ACKing the data, it has to wrap around and the slave (the FT-

X) will keep sending the 3 bytes of its ID.

Figure 9.7: Reading the Device ID

FT201XS-R 데이터시트(PDF) 34 Page - Future Technology Devices International Ltd.