SPRUJ52C june 2022 – july 2023 AM69 , AM69A , TDA4AH-Q1 , TDA4AP-Q1 , TDA4VH-Q1 , TDA4VP-Q1
In order to provide higher security level an optional Km-key encryption is provided. If Km-key encryption is enabled while sending HDCP_TX_CONFIGURATION command, then HDCP controller will expect Master Key, 1.4 Device Keys and Global Constant. These keys will be decrypted using Km-key (loaded using HDCP2_TX_SET_KM_KEY_PARAMS command) by the controller’s internal Firmware and used during Authentication and Key Exchange procedure. The Km-key encryption will also assure that when host reads Master Key it will receive it in encrypted form.
Enabling Km-key encryption affects the following commands or their parameters: