32-bit VGA Controllers - Timing Information

Frozen Content

Modified by Admin on Sep 13, 2017

The following tables provide information for setting the internal timing registers (HTIM and VTIM), when using either the VGA32 or VGA32_16BPP variants of 32-bit VGA Controller. Timing values are based on a variety of different monitor resolutions and refresh rates.

The VGA32_TFT Controller has been specifically designed to operate with the TX09D50VM1CAA – an Hitachi color TFT LCD panel offering a resolution of 240x320. All timings (horizontal and vertical) have therefore been fixed, in accordance with the timing requirements of this particular panel. As such, the following tables do not apply to this particular configuration of 32-bit VGA Controller.

Table 1. Horizontal timing information.

Resolution	Refresh Rate (Hz)	Pixel Clock (MHz)	Number of pixels per line	Sync pulse length (pixels)	Horizontal back porch (pixels)	Number of visible pixels
640x480	60	25.175	800	96	51	640
640x480	72	31.5	832	40	131	640
720x400	70	28.322	900	108	57	720
720x350	70	28.322	900	108	57	720
800x600	56	36	1024	72	131	800
800x600	60	40	1056	128	91	800
800x600	72	50	1040	120	67	800
640x480	75	31.5	800	96	51	640
640x480	66	30.24	864	64	99	640

Table 2. Vertical timing information.

Resolution	Refresh Rate (Hz)	Number of lines per frame	Sync pulse length (lines)	Vertical back porch (lines)	Number of visible lines
640x480	60	525	2	34	480
640x480	72	520	3	30	480
720x400	70	449	2	36	400
720x350	70	449	2	61	350
800x600	56	625	1	24	600
800x600	60	628	4	25	600
800x600	72	666	6	25	600
640x480	75	525	2	34	480
640x480	66	525	3	41	480