SCN2674

The signetics SCN2674 advanced video displlay controller (AVDC) is a programmable device designed for use in CRT terminals and display systems that employ raster scan techniques.The AVDC generates the vertical and horizontal timing signals necessary for the display of interlaced or non-interlaced data on a CRT monitor.It provides consecutive addressing to a user-specified display buffer memory domain and controls the CPU display buffer interface for various buffer configuration modes.A variety of operating modes,display for mats,and timing profiles can be implemented by programming the control registers in the AVDC.

A minimum CRT terminal system configuration consists of an AVDC,a keyboard and communication controller,a display character and graphic generator,an SCB2675 color/monochrome attributes controller (CMAC),a single-chip microcomputer such as the 8048,a display buffer RAM,and a small amount of TTL for miscellaneous address decoding,interface,and control.Typically,the package count for a minimum system is between 15 and 20 devices;system complexity can be enhanced by upgrading the micro processor and expanding via the system address and data buses.

The SCN2674 and SCN2674T has some absolute maximum ratings.When symbol is TA,the parameter is operating ambient temperature,the rating is 0 to +70,the unit is .When symbol is Tstg,the parameter is storage temperature range,the rating is -65 to +150,the unit is .The parameter is all voltage with respect to ground,the rating is 0.5 to +6.0,the unit is V.