SLASEC8B February 2017 – January 2019 PGA460-Q1
The time-command interface is the communication interface connected on the IO pin. The default state for the IO pin when the interface is idle is HIGH (pulled up to VPWR). The pin communication is bi-directional, where upon receiving a command, the PGA460-Q1 device is actively driving the IO pin and providing a response by changing the state of the IO pin. If the time-command interface remains stuck while transmitting a command or data for a particular command that is either LOW or HIGH for more than 15 ms, then the PGA460-Q1 communication resets and is expected to receive a new command transmission from the master device.
The time-command interface is specified by five time commands, where four are classified as run commands and one CONFIGURATION/STATUS command. Logic 0 is transmitted by pulling the IO pin low for a time duration of tBIT0_TCI and logic 1 is transmitted by pulling the IO pin low for time duration of tBIT1_TCI as defined in the Specifications section. Figure 12 and Figure 13 receptively show the general timing diagram for device time commands and for logic bit timing. The t(DT_TCI) dead-time is defined for the PGA460-Q1 device to process the received command and change the IO pin state from input to output.