FT629 - Ferret

FT629 Switch Detection Chip

The FT629 is a switch detection chip. It will detect a change on any of its five input pins and send one byte out of the TX pin. The output byte’s lower five bits correspond to the state of the input pins 1-5. Figure 1: FT629 pin out www.DataSheet4U.com Operation: The operation of the FT629 is very simple. It will transmit one byte each time there is a cha.

Features

mp, etc.). Description of Output: A single byte is output by the FT629 whenever the status of one of its input pins has changed. The status of each pin is encoded into the lower five bits of the output byte, according to Figure 2. Figure 2: Output Byte Organization X Bit7 X Bit6 X Bit5 Pin5 Bit4 Pin4 Bit3 Pin3 Bit4 Pin2 Bit5 Pin1 Bit6 X: does not matter Pin[1-5]: 0 = switch open 1 = switch closed © 2001 FerretTronics, Inc. Page: 1 FT629 ‘Otter’ Sample Circuits: www.DataSheet4U.com Page: 2 © 2001 FerretTronics, Inc. .