SPRUI30H November 2015 – May 2024 DRA745 , DRA746 , DRA750 , DRA756
Figure 11-28 through Figure 11-31 show timing diagrams of synchronization signals and pixel clocks for active matrix panels. The DISPC directly drives these signals, which are related to the programmable fields listed in Table 11-56.
Name | Register | Description |
---|---|---|
PPL | DISPC_SIZE_LCDo[11:0] PPL value + 1 | Pixels per line |
LPP | DISPC_SIZE_LCDo[27:16] LPP value + 1 | Lines per panel |
HBP | DISPC_TIMING_Ho[31:20] HBP value + 1 | Horizontal back porch |
HFP | DISPC_TIMING_Ho[19:8] HFP value + 1 | Horizontal front porch |
HSW | DISPC_TIMING_Ho[7:0] HSW value + 1 | Horizontal synchronization pulse width |
VBP | DISPC_TIMING_Vo[31:20] VBP value | Vertical back porch |
VFP | DISPC_TIMING_Vo[19:8] VFP value | Vertical front porch |
VSW | DISPC_TIMING_Vo[7:0] VSW value + 1 | Vertical synchronization pulse width |
ONOFF(1) | DISPC_POL_FREQo[17] ONOFF | DISPC_HSYNC and DISPC_VSYNC pixel clock control |
RF(2) | DISPC_POL_FREQo[16] RF | DISPC_HSYNC and DISPC_VSYNC pixel clock edge control |
IEO | DISPC_POL_FREQo[15] IEO | Invert DISPC_ACBIAS |
IPC(3) | DISPC_POL_FREQo[14] IPC | Invert DISPC_PCLK |
IHS | DISPC_POL_FREQo[13] IHS | Invert DISPC_HSYNC |
IVS | DISPC_POL_FREQo[12] IVS | Invert DISPC_VSYNC |
The HSYNC and VSYNC signals are driven on the opposite edge of PCLK from the pixel data.
The DE signal is active high.
The pixel data are driven on the rising edge of PCLK.
The HSYNC signal is active high.
The VSYNC signal is active high.
The HSYNC and VSYNC signals are driven on the rising edge of PCLK.
The DE signal is active low.
The pixel data is driven on the falling edge of PCLK.
The HSYNC signal is active low.
The VSYNC signal is active low.
The HSYNC and VSYNC signals are driven on the rising edge of PCLK.
The DE signal is active high.
The pixel data are driven on the rising edge of PCLK.
The HSYNC signal is active high.
The VSYNC signal is active high.