NXP Semiconductors TDA4821P
The TDA4821P performs the ‘autosize’ feature for colour monitors. The IC measures the timing of active H/V video with respect to the H-sync and V-sync pulses and also with respect to the horizontal flyback pulse in order to allow the microcontroller to adjust the display settings automatically, in particular parameters HSIZE, VSIZE, HPOS and VPOS. The activation of the autosizing function can be done on user command or automatically on any mode change.| Part No. | TDA4821P |
|---|---|
| Datasheet | TDA4821P Download |
| Manufacturer |  NXP Semiconductors |
| Description | Autosize |
| Buy | Stock & Price |
FEATURES
● Measuring of six horizontal and four vertical timing parameters as follows: – Horizontal: sync width, sync period, video start, video end and horizontal flyback pulse start and end – Vertical: sync width, sync period, first line of video active and last line of video active.● Detection of H-sync and V-sync polarity
● I2C-bus interface (maximum clock frequency 400 kHz) for read-out of data and write data of the internal clock multiplier using double byte (16-bit format)
● Flexible digital clock input with built-in and (via I2C-bus) adjustable clock multiplier; internal clock is 48 MHz (typical value)
● Horizontal measurements are expressed in number of clock pulses; precision is approximately 20 ns at 48 MHz and can be improved if external averaging methods are used
● Vertical measurements are expressed in number of lines
● Internal buffer keep I2C-bus registers stable between the V-sync pulses, allowing for asynchronous read-out.
GENERAL DESCRIPTION
ORDERING INFORMATION TYP...
