ZHCSQL1 May 2022 DP83TC813R-Q1 , DP83TC813S-Q1
PRODUCTION DATA
Sleep request is entered when switching from normal mode to sleep mode. This is an intermediate state and is used to for a smooth transition into sleep mode. In sleep request mode, the PHY transmits LPS code-groups, informing the Link Partner that sleep is requested.
PHY sleep_rqst_timer (default = 16ms) begins once the PHY enters into sleep request mode. LPS decoding at the Link Partner will trigger the LPS RECEIVED interrupt. In sleep request state device waits for Link Partner to send LPS symbols. Once LPS symbols are received by the device, it transitions to SLEEP_SILENT state. If the sleep_rqst_timer expires before device receives LPS codes, the device enters SLEEP FAIL state. .