FT4232H datasheet(33/43 Pages) FTDI

tên linh kiện	FT4232H

Giải thích chi tiết về linh kiện	QUAD HIGH SPEED USB TO MULTIPURPOSE UART

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Document No.: FT_000060

FT4232H QUAD HIGH SPEED USB TO MULTIPURPOSE UART/MPSSE IC

Datasheet Version 2.05

Clearance No.: FTDI#78

6.4

4 Channel Transmit and Receiver LED Indication Example

The following example illustrates how a 74HCT595 can be used to decode the EEDATA data to indicate Tx

and Rx on each of the channels. The associated LED will light when the Channel is transmitting or

receiving data.

Figure 6.6 Using 74HCT595 to Indicate Tx and Rx Data

In this configuration, the LEDs will flash when the EEPROM is accessed. For example during enumeration.

Under normal operation, the EECS is held low to disable access to the EEPROM. In this special case, the

EECLK will clock the EEDATA into the 74HCT595 shift register (with EECS low, therefore EEPROM ignores

the EEDATA). Then EECS will pulse high. The rising edge of the EECS latches the data into a storage

Please refer to the 74HCT595 datasheet for further explanation.

FT4232H bảng dữ liệu(PDF) 33 Page - Future Technology Devices International Ltd.