FT201XQ-R FTDI, FT201XQ-R Datasheet - Page 33

• Manufacturer Part Number: FT201XQ-R
• Description: USB Interface IC USB to I2C IC QFN-16
• Manufacturer: FTDI

Specifications of FT201XQ-R

• Rohs: yes
• Product: USB 2.0
• Data Rate: 12 Mbps, 480 Mbps
• Interface Type: I2C, USB
• Operating Supply Voltage: 2.97 V to 5.5 V
• Operating Supply Current: 6.4 mA to 8.65 mA
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-16
• Tradename: X-Chip

Note that because the acknowledgement can be checked for each byte written (since the FT-X slave is
generating the acknowledge when writing to it), there is no command to ask the FT-X how much buffer
space is available.
9.3 Other I
Soft reset
This uses the General Call Address. If the second byte is 0x06 (0000 0110) it will be interpreted by the
FT-X as the Soft Reset command. This will reset the chip and clear all buffers.
Flush command
This uses the General Call Address. If the second byte is 0x0E (0000 1110) it will be interpreted by the
FT-X as the Flush command and the Transmit and Receive buffers will be flushed of all data.
Figure 9.4: Flush data command
Read Data Available command
This uses the General Call Address. If the second byte is 0x0C (0000 1100) it will be interpreted by the
block as the Read Data Available command and on the next I
data will hold the number of bytes available for burst read.
Figure 9.5: Reading the amount of data available
USB State command
This uses the General Call Address. If the second byte is 0x16 (0001 0110) it will be interpreted by the
block as the USB State command and on the next read cycle following this command, the data will hold
the coded USB State value. The USB state allows you to check the current USB enumeration state:
0x00 = Suspended.
0x01 = Default.
0x02 = Addressed.
0x03 = Configured.
Note: The Configured state is the normal operating state.
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how many bytes are available. This signal can be mapped to the CBUS pins. Note that the
Receive buffer is the buffer which holds data which has come from the external I
going to the host computer over USB.
Do a write over I
NAK if there is no space in the buffer for the data to be written into. The FT-X will NACK in the
address phase if this is the first byte being written and there is no space available. If the buffer
becomes full during a burst write, the FT-X will NACK any bytes during the data phase which
cannot be accommodated in the buffer.
2
C Commands
Copyright © 2013 Future Technology Devices International Limited
2
C (Master transmitter, Slave receiver) and check if the FT-X ACKs. The FT-X will
FT201X USB I2C SLAVE IC Datasheet
Document No.: FT_000627 Clearance No.: FTDI# 264
2
C read cycle following this command, the
2
C master and is
Version 1.3
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