SPRUJ52C june 2022 – july 2023 AM69 , AM69A , TDA4AH-Q1 , TDA4AP-Q1 , TDA4VH-Q1 , TDA4VP-Q1
The DSI host may send a command sequence and then request an acknowledge message from the panel. The host will send the command and release the bus by performing a BTA sequence. The panel will then respond with an acknowledge message (or error response) followed by a BTA to return the bus to the host. This sequence is illustrated in Overview of a Display Subsystem.
Overview of a Display Subsystem.
Figure 12-435 shows LP transmission timing diagram.
The Host will not be able to transmit any other packets once the BTA is sent to the panel and will expect either an ACK trigger or response LPDT message with a payload. The system must ensure there is sufficient time to send any command and issue the BTA, receive the response (Trigger, Short or long packet) and accept the BTA from the panel, if this request is made in the line blanking intervals.
Figure 12-436 presents panel read response sequences.
The panel response time will be based on the tx_esc_clk used inside the panel and the expect number of bytes for the payload. The expected reposes are illustrated in the blocks in the MIPI DSI standard.