CRT8021 Datasheet | SMSC

STANDARD MICROSYSTEMS CORPORATIONAt CRT 8021 CRT 8021-003 j1PC FAMILY CRT Video Attributes Controller Video Generator VAC Features o ON CHIP VIDEO SHIFT REGISTER Maximum shift register frequency-20MHz Maximum character clock rate-2.5MHz o ON CHIP HORIZONTAL AND VERTICAL RETRACE VIDEO BLANKING o ON CHIP GRAPHICS GENERATION o ON CHIP ATTRIBUTE LOGIC-CHARACTER, FIELD Reverse video Character blank Character blink Underline Strike-thru o ON CHIP BLINKING CURSOR o ON CHIP DATA BUFFER o ON CHIP ATTRIBUTE BUFFER 0+5 VOLT OPERATION o TTL PATIBLE o MOS N-CHANNEL SILICON-GATE COPLAMOS® PROCESS PIN CONFIGURATION VIDEO 1 LD/SH 2 VDO 3 A0 4 A1 5 A2 6 A3 7 A4 8 AS 9 A610 A7 11 Vee 12 R2 13 R314 28 RETBL 27 CURSOR 26 Msa 25 MSI 24 BLINK 23 VSYN 22 CHABL 21 REVID 20 UNDLN 19 STKRU 18 ATTBE 17 GND 16 RO 15 R1 I o PATIBLE WITH CRT 5027/37 VTAC® AND CRT 9007 VPAC GENERAL DESCRIPTION The SMC CRT 8021 Video Attributes Controller (VAC) is an n-channel COPLAMOS® MOS/LSI device. It contains wide and thin graphics logic, attributes logic, a data latch, field and character attribute latch, a blinking cursor, and a high speed video shift register. The CRT 8021 VAC isa panion to SMC's CRT 5027/37VTAC® or CRT 9007 VPAC. The CRT 8021 and a character ROM bined with either a CRT 5027/37 or a CRT 9007 prises the major circuitry required for the display portion of a CRT video terminal. The CRT 8021 video output may be connected directly to a CRT monitor video input. The CRT 5027/37 or CRT 9007 blanking output can be connected directly to the CRT 8021 retrace blank input to provide both horizontal and vertical retrace blanking of the video output. A blinking cursor is available on the CRT 8021. There is a separate cursor blink rate which is twice the character blink rate and has a duty cycle of 50/50. strike-thru are similar but independently controlled functions. These attributes are available in all modes. The thin graphic mode enables the user to create single line...