SLLSFX1 September 2024 ISO6163
ADVANCE INFORMATION
Refer to the PDF data sheet for device specific package drawings
The low-speed control channels with automatic enable have ACTIVE state sample time and delay timer to prevent unintended entry to or exit from STANDBY state. This section explains the impact of these timing requirements on the automatic enable functionality and the maximum data rate possible in the low-speed control channels.
Both low-speed control channels, C and D, have an ACTIVE sample time, tAMS, preventing noise from triggering state transitions. When at least one of the low-speed control channels, C and D, is LOW longer than the ACTIVE sample time, the device generates an ACTIVE mode request and either transitions to ACTIVE state or remains in ACTIVE state, canceling any STANDBY requests that can be generated. When the device must transition from STANDBY to ACTIVE upon an ACTIVE request, the device does so within tLPN from the falling edge on one or both of the low-speed control channels.
When both low-speed control channels have been HIGH longer than the ACTIVE sample time a STANDBY request is generated. As long as an ACTIVE mode request is not generated before the STANDBY state enable delay time, tLP_EN, elapses the device transitions to STANDBY state and remains there until an ACTIVE node request is generated.
The following flowchart and figures show how the ACTIVE sample time, STANDBY state enable delay time and power up conditions impact the state of the device and the high-speed channels.