Microchip Technology Incorporated
Daisy chain mode entry sequence

Abstract:

A node in a daisy chain includes a serial data input port configured to receive input from an electronic device, a serial data output port configured to send output to another electronic device, a chip select input port configured to receive input from a master control unit, a timer, and an interface circuit. The interface circuit may be configured to, in a daisy chain mode, copy data received at the serial data input port to the serial data output port, and upon receipt of a changed edge of a chip select signal on the chip select input port, initiate the timer. The interface circuit may be configured to, upon the completion of a time to be determined by the timer, enter the daisy chain mode.