UPD3301-1 - NEC

UPD3301-1 Programmable CRT Controller

Counts the characters in a row, up to the number of the characters defined in Characters/Row, Row Buffer Consists of a dual RAM buffer. Each buffer can store up to 80 characters. During a DMA operation, the characters are written into the Row Buffer. One of the buffers is used for display. Each character in the buffer is read with Character Clock (C ClKl,.

Features

ATU RES
• Programmable Screen and Character Format Capabilities; -. Characters per Row (up to 80 characters/row) - Lines per Character (up to 32 lines/character} - Rows per Frame (up to 64 rows/frame) - Horizontal Retrace Time - Vertical Retrace Time - Blinking Time - DMA Control Mode - Cursor Control Mode
• Three Independent Visual Field Attribute Modes such as; - Transparent Attribute Color Mode - Transparent Attribute Black and White Mode - Non
·Transparent Attribute Black and White Mode
• 12 Independent Field Attribute Functions such as; - Vertical Line - Blue - Blinking -.